Section 2 API-653 Practice Questions

Overall Objective for this Manual:

Section 1 - Introduction

1.API-653 covers which of the following types of tanks?

a) Carbon and low alloy steel tanks built to ASME Section VIII, Div.1

b) Carbon and low alloy steel tanks built to ASME Section X

c) Carbon and low alloy steel tanks built to API - 650 and 12C

d) Carbon and low alloy steel tanks built to API - 510

Reference: API-653 Paragraph 1.1.1

2. API-653 provides the requirements for construction of which of the following?

a) Process pressure vessels

b) Aboveground petroleum storage tanks

c) LNG Storage spheres

d) This standard does not provide construction requirements


3. API-653 provides for all but which of the following with regard to aboveground storage tanks?

a) Repair

b) Operation

c) Relocation

d) Alteration


4. The scope of API-653 is limited to all of the following except?

a) Tank foundation

b) Tank Bottom

c) Tank roof

d) Tank mixing motor


5. The API-653 standards states that many of the requirements for design, welding, and materials of API-650 and API-12C can be applied with regard to _____.

a) Repair, inspection, rating, and alteration.

b) Repair, personnel assignment, maintenance, and inspection.

c) Inspection, product in storage, rating, and alteration.

d) Alteration, refinery equipment, electrical controls, and repair.


6. In the application of the requirements for welding, design, and materials of API-650 or API-12C to in-service aboveground storage tanks (AST), which of the following code or standard takes precedence?

a) ASME Section VIII, Pressure Vessels

b) API-12C

c) API-653

d) API-650


7. The API-653 Standard may only be applied to aboveground storage tanks (AST) that have been constructed to and meet the requirements of API-650.a) True

b) False


8. The use of API-653 is intended for organizations that have personnel who are technically trained and experienced in which of the following?

a) All ASME, AWS, ASNT, and API Codes and Standards

b) Tank design, fabrication, repair, construction, and inspection

c) Refinery operations, safety requirements, personnel management, and refinery design

d) Mechanical integrity program, OSHA regulations compliance program, and Process Safety Management


9. When design and construction details are not given and not available in the original construction standard, then details that will provide a level of integrity equal to the current edition of what Code or Standard must be used?

a) ASME Section VIII, Division 1, Pressure Vessels

b) ASME Section VIII Division 2, Alternative Rules for Pressure Vessels

c) API- 650, Welded Steel Tanks for Oil Storage

d) API-12C Steel Storage Tanks for Oil Storage


10. Ultimate responsibility for compliance with this standard rests with ____?

a) The Owner/Operator

b) The Owner/Operators Inspector

c) The repair organization of the Owner/Operator

d) The manufacturer of the AST

Reference: API-653 Paragraph 1.2

11. According to API-653, if any provision presents a direct or implied conflict with any statutory regulation, the regulation governs. What governs if API-653 requirements are more stringent than the statutory regulation?

a) The statutory regulation applies in all cases

b) The conflict must be submitted to the American Petroleum Institute for resolution

c) The owner/operator has the option of applying the requirement best suited to the situation

d) The API-653 requirements shall govern


12.Safe working practices shall comply with what requirements concerning confined space entry?

a) Procedures must comply with any trade developed safety precautions

b) Procedures must comply with any federal or state regulations

c) Procedures need only comply with owner/operator/s requirements

d) Procedures need only comply with NFPA requirements


Answers to API-653 Section 1, Introduction

Question NumberAnswer

1C

2D

3B

4D

5A

6C

7B

8B

9C

10A

11D

12B

Should you find a mistake or disagree with any answer listed, please bring it to our attention for correction or clarification.

BAY Technical Associates, Inc. has attempted to provide answers developed from paragraphs of the respective Code, Standard, or Recommended Practice.

You can reach BAY Tech by phone at (610) 594-9036, by fax at (610) 594-2612, or by

e-mail at [email protected].

Section 2 Suitability for Service

1. When must an evaluation, to determine the suitability for continued use, be conducted?

a) Evaluations shall be conducted when a tank inspection reveals a change has occurred from the original physical condition of the tank.

b) Evaluations shall be conducted at least annually

c) Evaluations shall be conducted at an interval not to exceed the calculated tank inspection frequency.

d) Evaluations shall be conducted once each ten years of service


2. What factors are required for consideration when performing an evaluation for continued use of an AST?

a) Only those listed in API-653

b) The recommended list of considerations provided in API-510 can be modified to suit this purpose

c) Engineering analysis and judgement required for each situation

d) Only those items requested by the Certified Aboveground Storage Tank Inspector


3. Roof plates corroded to an average thickness of less that ____ inch in any ___ square inch area shall be repaired of replaced.

a) 0.9 inch in any 100 square inch area

b) 0.09 inch in any 10 square inch area

c) 0.09 inch in any 144 square inch area (1 square foot)

d) 0.09 inch in any 100 square inch area

Reference: API-653 Paragraph 2.2.1.2

4. The method of inspecting roof support members shall be acceptable to whom?

a) The manufacturer of the AST

b) The responsible inspector

c) The Owner/Operators design engineering department

d) The operations manager


5. During the inspection of fixed roof support members, particular attention must be given to .

a) Severe external corrosion of the roof plate where support structures are attached

b) Severe internal corrosion of pipe columns

c) Severe internal corrosion of the roof plate where support structures are attached

d) Deterioration of wind girders at the point of attachment


6. Inspection of floating roofs is limited to roof plates and pontoons.

a) True

b) False


7. Evaluation of existing floating roofs shall be based on the criteria of

a) API-650, Appendix C for external floating roofs and Appendix H for internal floating roofs

b) API-510 Paragraph 6.4.3 for external floating roofs and 6.5.3 for internal

c) ASME Section VIII, Div 1 Appendix C for external floating roofs and Appendix H for internal

d) ASME Section VIII, Div. 2 Alternative Rules


8. What API Standard or Recommended Practice must be used for evaluating the effects of design partial vacuum on tank roofs?

a) API Standard 620

b) API Standard 650

c) API Recommended Practice 651

d) API Recommended Practice 652


9. Above what operating temperature shall API Standard 650, Appendix M, be considered before changing the service of a tank?

a) 500(F

b) 400(F

c) 300(F

d) 200(F


10. Under what conditions may a tank be operated at a temperature lower than the original design?

a) When the requirements for impact testing of ASME Section VIII, Division 1 have been met

b) When the requirements of the applicable standard or API Standard 650 have been met

c) When the requirements of ASTM Specification A-370 have been met

d) When the requirements of ASTM Specification A-20 have been met


11. Flaws, deterioration, or other conditions that might adversely affect the performance or structural integrity of the shell of an existing tank must be evaluated. Personnel experienced in tank design shall conduct the evaluation. This analysis shall take into account any of the following except

a) Fluid static head

b) Internal and external pressure

c) Organization that manufactured the tank

d) Seismic loads


12. Of the following, which is not an option available to the owner/operator if it is not possible to satisfy the requirements for minimum thickness calculations for a welded tank?

a) Repair damaged areas

b) Reduce allowable liquid level

c) Retire the tank

d) Reduce the fill rate so the tank fills slower and applies pressure gradually


13. Out-of-roundness, buckled areas, flat spots, and peaking and banding of welded joints are all examples of _____.

a) Shell Distortions

b) Flaws

c) Discontinuities

d) Severe damage


14. Shell distortions require the tank to be immediately removed from service and inspected.

a) True

b) False


15. Flaws such as cracks or laminations shall be thoroughly examined to determine their nature and extent and the need for repairs.

a) True

b) False


16. What if anything should be done with cracks in the shell-to-bottom weld?

a) These cracks can be sealed with caulking and the tank returned to service

b) The welds can have a cover weld pass applied over them to prevent leakage

c) Cracks of this type are critical and the tank must be retired from service since repairs are prohibited.

d) Cracks in the shell-to-bottom weld are critical and shall be removed and the weld repaired


17. Internal pitting and pitting rates in the anticipated service, corrosion of weld joints (weld and heat affected zone), weld joint cracking history, and stresses placed on the bottom plates by roof support loads and shell settlement are all examples of causes of what type of failure?

a) Annular ring failure

b) Shell plate failure at first shell course

c) Bottom failure

d) Fatigue failure due to repeated jacking of floor plates


18. Underside corrosion (normally in the form of pitting), inadequate drainage resulting in surface water flowing under the tank bottom, lack of an annular plate ring when required, uneven settlement that results in high localized stresses in the bottom plates, and inadequate provision for movement of roof support columns and other supports are all examples of causes of what type of failure?

a) Shell plate failure at first course

b) Bottom failure

c) Failure of support columns due to hydraulic compression

d) Creep cracking failure


19. Of the following what has historically not been a cause of bottom failures?

a) Non-homogeneous fill under the tank bottom

b) Rock or gravel foundation pads with inadequately filled-in surface voids

c) Inadequate inspection frequency

d) Inadequately supported sumps


20. Where would you look to find the basis for cathodic protection systems for the underside of tank bottoms?

a) API Recommended Practice 651

b) API Recommended Practice 652

c) API Standard 2015

d) API Standard 2207


21. Where would you look to find procedures and practices for protecting tank bottoms with internal lining?

a) API Recommended Practice 651

b) API Recommended Practice 652

c) API Standard 2015

d) API Standard 2207


22. What two methods may be used in quantifying the remaining thickness of tank bottoms?

a) Drilling and actual measurement

b) Ultrasonic and radiography

c) Deterministic and probabilistic

d) Detailed stress analysis and plate deformation measurement


23. Unless a stress analysis is performed, what is the minimum thickness of bottom plates in the critical zone?

a) Smaller of the original bottom plate thickness or 50% of tmin of the lower shell course but not less than 0.1 inch.

b) Smaller of the original bottom plate thickness or 25% of tmin of the lower shell course but not less than 0.1 inch.

c) Smaller of the original bottom plate thickness or 75% of tmin of the lower shell course but not less than 0.1 inch.

d) Smaller of the original bottom plate thickness or 50% of tmin of the lower shell course but not less than 0.01 inch.


24. When repairing internal pitting for the extension of in-service operating period, the repair shall be by any of the following methods except.

a) Pit welding

b) Brazing

c) Overlay welding

d) Lap Patching


25. The thickness of the bottom plate projection beyond the shell, measured at the toe of the weld of the outside bottom-to-shell fillet weld shall be not less than?

a) 0.25 inch

b) 0.01 inch

c) 0.50 inch

d) 0.10 inch


26. The projection of the bottom plate beyond the toe of the shell-to-bottom weld shall be at least?

a) 0.125 inch

b) 0.250 inch

c) 0.375 inch

d) 0.500 inch


27. An aboveground storage tank contains a fluid with a specific gravity of less than one. The thickness of the plate in the first course is 7/8. What is the minimum thickness of the annular plate ring, seismic loading is not a consideration, and the stress in the first course is 27,850 pound per square inch?

a) 0.22 inch

b) 0.31 inch

c) 0.20 inch

d) 0.23 inch

Reference: API-653 Paragraph 2.4.8.2 and Table 2-3

28. An aboveground storage tank contains a fluid with a specific gravity of greater than one. The thickness of the plate in the first course is 7/8. What is the minimum thickness of the annular plate ring, seismic loading is not a consideration, and the hydrostatic test stress in the first shell course is 27,850 pound per square inch?

a) 1 / 4 inch

b) 3 / 8 inch

c) 9 / 32 inch

d) 11 / 32 inch

Reference: API-653 Paragraph 2.4.8.3 and Table 3-1 API-650

29. Settlement, erosion, cracking, and deterioration of concrete are all examples of which of the following principle modes of failure or deterioration?

a) Annular plate ring failure

b) Shell-to-bottom weld failure

c) Deterioration of walkways and roadways

d) Deterioration of foundations


30. To ensure suitability for service, what is the minimum permitted frequency of tank foundation inspection?

a)Annually

b)Every five years

c)Monthly

d)PeriodicallyReference: API-653 Paragraphs 2.5.1.1 & 4.3.1.2

31. Distortion of anchor bolts and excessive cracking of concrete structures may be indications of what two conditions?

a) Serious foundation settlement of a tank overpressure uplift condition

b) Inferior material used in the anchor bolts and the concrete structure

c) Over tightening of the anchor bolts and improper mixing of the concrete

d) The tank was struck by lightning and wind caused movement of the tank


Message to the student:

API-653 Paragraph 2.5.1.2 contains descriptions of some mechanisms of concrete deterioration. It would be in your best interest to read these descriptions carefully and understand them. The examination may contain questions that would require you to know the definition of one or more of these modes of deterioration.

Answers to API-653 Section 2, Suitability for Service


1A

2C

3D

4B

5B

6B

7A

8A

9D

10B

11C

12D

13A

14B

15A

16D

17C

18B

19C

20A

21B

22C

23A

24B

25D

26C

27B

28C

29D

30C

31A





Section 3 Brittle Fracture Considerations

1. Incidents of tank failure due to brittle fracture have occurred shortly after erection during hydrostatic testing or in all but which of the following incidents?

a) On the first filling in cold weather

b) After a change to a higher temperature service

c) After a change to a lower temperature service

d) After a repair or alteration


2. The risk of tank failure due to brittle fracture is considered minimal after what condition(s)?

a) The tank has demonstrated its ability to withstand the combined effects of maximum liquid level (highest stresses) and highest operating temperature

b) The tank has demonstrated its ability to withstand the combined effects of intermediate liquid level (highest stresses) and lowest operating temperature

c) The tank has demonstrated its ability to withstand the combined effects of maximum liquid level (highest stresses) and lowest operating temperature

d) The tank has demonstrated its ability to withstand the combined effects of maximum liquid level (highest stresses) and intermediate operating temperature


3. If it is decided to change the service to a more severe service, it is necessary to

a) Consider the need for pneumatically testing the entire tank

b) Consider the need to recalculate the effectiveness of all reinforcement of openings

c) Consider the need for hydrostatic testing

d) Consider removing all previous welded repairs and have them redone


4. If a tank shell thickness is less than _____ inch, and an evaluation in accordance with Section 2 of API-653 has been performed, the risk of brittle fracture is considered to be minimal.

a) 0.01

b) 0.10

c) 0.05

d) 0.50


5. No known tank failures attributed to brittle fracture have occurred at shell metal temperatures of _____(F and above.

a) -20

b) 20

c) 40

d) 60


6. According to industry experience and laboratory tests, what membrane stress is required to caused failure due to brittle fracture?

a) 6 ksi

b) 7 ksi

c) 10 ksi

d) 12 ksi


7. What is the lowest temperature that a tank, constructed of carbon steel of unknown toughness, may be used? The maximum thickness of the shell is .625

a) 40(F

b) 45(F

c) 50(F

d) 55(F

Reference: API-653 Paragraph 3.3.7 and Figure 3-2

8. What is the purpose of Figure 3-1 of API-653?

a) Provides a procedure to be used in the evaluation of the remaining life of tank bottom plates

b) Provides a procedure to be used in the evaluation of the likelihood of floating roof pontoon failure

c) Provides an assessment procedure for evaluating aboveground storage tanks operating at 15 psi

d) Provides an assessment procedure for evaluating atmospheric aboveground storage tanks

Reference: API-653 Paragraph 3.3 and Figure 3-1

Answers to API-653 Section 3, Brittle Fracture Considerations


1B

2C

3C

4D

5D

6B

7A

8D

Should you find a mistake or disagree with any answer listed, please bring it to our attention for correction or clarification. BAY Technical Associates, Inc. has attempted to provide answers developed from paragraphs of the respective Code, Standard, or Recommended Practice.



Section 4 Inspection

1. What is the purpose of periodic in-service inspection?

a) The purpose of periodic in-service inspection, assure job security for inspectors

b) The purpose of periodic in-service inspection, assure proper operation of AST

c) The purpose of periodic in-service inspection is to assure continued tank integrity

d) The purpose of periodic in-service inspection is to assure OSHA compliance


2. Of the following, which is not a consideration that must be addressed in determining inspection intervals for ASTs?

a) Corrosion prevention systems

b) Inspection interval of other equipment located near the tank under consideration

c) Changes in service (including changes in water bottoms)

d) Previous inspection results


3. What methods of inspection must be considered when establishing inspection frequencies?

a) On-stream core sample inspection

b) On-stream nondestructive inspection

c) In-service aerial inspection

d) In-service groundwater inspection


4.Close visual inspections of aboveground storage tanks, from the ground, are required. Owner/operator personnel who may be other than the Authorized Inspector may perform this inspection. The interval of such inspections shall not exceed:

a) At least every five years or 1/4 the corrosion rate life of the shell whichever is less

b) 12 months

c) 6 months

d) 1 month


5. All tanks shall be given a visual external inspection, by an Authorized Inspector, at what frequency?

a) Inspection conducted at least every 20 years or at the quarter corrosion rate of the bottom whichever is less

b) Inspection conducted at least every 5 years or at the quarter corrosion rate of the bottom whichever is less

c) Inspection conducted at least every 5 years or at the quarter corrosion rate of the shell whichever is less

d) Inspection conducted at least every 20 years or at the quarter corrosion rate of the shell whichever is less


6. External ultrasonic thickness measurements of the shell, while the tank is in service, can be a means of determining rate of uniform corrosion. The extent of UT measurements shall be determined by the owner/operator. What is maximum interval of such thickness measurements when the corrosion rate is not known?

a) Five years

b) Three years

c) One year

d) Every three months until the corrosion rate is established

Reference: API-653 Paragraph 4.3.3.2a.

7. The minimum thickness of a tank was established at 0.585 inch. The shell was fabricated from 3/4 inch plate and included a 0.125 inch corrosion allowance. The tank has been in service for eight years and current ultrasonic thickness measurements reveal an average thickness of 0.712 inch. Based on this information determine when the next ultrasonic thickness measurements will be required.

a) Fifteen years

b) Thirteen years

c) Eleven years

d) Nine years

Reference: API-653 Paragraph 4.3.3.2b.

8. Internal inspections are primarily required to do all but which of the following?

a) Ensure the internal surfaces of the tank are thoroughly cleaned periodically

b) Identify and evaluate any tank bottom settlement

c) Ensure that the bottom is not severely corroded and leaking

d) Gather data necessary for the minimum bottom and shell thickness assessments


9.When can the required internal inspection be performed by some method other than visual inspection?

a)Substitution of the visual inspection is never permitted

b)If the internal inspection is required solely for determining the condition and integrity of the tank bottom

c)If the internal inspection is required solely for determining the condition and integrity of the tank critical zone

d)If the internal inspection is required solely for determining the condition and integrity of the tank roof support structure


10.According to API-653, all tanks shall have a formal internal inspection conducted at intervals defined by this standard. Who is required to conduct the visual inspection?

a)The corrosion engineer

b)The person designated by the Authorized Inspector

c)The authorized Inspector

d)The person designated by the owner user

Reference: API-653 Paragraph 4.4.1.211.Intervals between internal inspections shall be determined by the corrosion rates measured during previous inspections or anticipated based on experience with tanks in similar service. The internal inspection interval shall not exceed how many years?

a) Ten years

b) Fifteen years

c) Twenty years

d) Twenty-five years


12. What is the minimum thickness permitted at the next inspection for a tank bottom designed with a means to provide detection and containment of a bottom leak?

a) 0.01 inch

b) 0.10 inch

c) 0.50 inch

d) 0.05 inch

Reference: API-653 Paragraph 4.4.2.1 & 2.4.7.4

13. In cases where corrosion rates are not known and similar service experience is not available, the bottom plate actual thickness shall be determined by inspection(s) within how many years?

a) 25 years

b) 20 years

c) 15 years

d) 10 years


14.Which of the following is a recognized alternative to internal inspection interval described in API-653?

a)Risk-based Inspection procedures (RBI)

b)Hydrostatically testing the tank every five years

c)Performing complete calculations for minimum required thickness of the tank shell and bottom

d)API-653 does not permit any alternatives to the internal inspection intervals


15.Of the following, which would not be a factor to be considered in a Risk-based assessment of a tank?

a)Availability and effectiveness of inspection methods and quality of data collected

b)The methods used for determining the thickness of the shell and bottom plates

c)Effectiveness of corrosion mitigation methods

d)Names of all operators since the initial start-up of the tank


16. The owner/operator is required to maintain complete record file consisting of three types of records. Which of the following is not one of the three types of records.

a) Repair/alteration history

b) Fill cycles

c) Construction

d) Inspection


17. General inspection reports shall include which of the following?

a) Metal thickness measurement, repairs, conditions found, settlement measurements, and recommendations

b) Metal thickness measurement, repairs, operational upsets, settlement measurements, and recommendations

c) Metal thickness measurement, repairs, conditions found, name of organization performing environmental impact study, and recommendations

d) Metal thickness measurement, list of all personnel who have worked on the tank since the last inspection, conditions found, settlement measurements, and recommendations


Note to Student: Be sure to know all the requirements for Inspector Qualifications. Questions can appear on the exam requiring you to know one, two, or all of these qualification requirements. You will find these requirements are similar to those found in Inspector Certification programs for API-510 and API-570.

Answers to API-653 Section 4, Inspection

Question NumberAnswerQuestion NumberAnswer

1c10c

2b11c

3b12d

4d13d

5c14a

6a15d

7b16b

8a17a

9b





Section 5 Materials

1. All new materials used for repair, alteration, and reconstruction shall conform to which of the following?

a) The existing material code at the time of original construction

b) The latest NFPA Code

c) The current applicable tank standards

d) Any ASME Code specification for P-1 material

Reference: API-653, Paragraph 5.2

2.All shell plates and bottom plates welded to the shell shall be identified. Material identified by any of the following except _____ does not require further identification?

a) Original contract drawings

b) API name plates

c) Suitable documentation

d) Owner/operator's experience with similar tanks in similar service constructed of similar material

Reference: API-653, Paragraph 5.3.1.1

3. Each individual plate for which adequate identification can not be made; the plate shall be _______.

a) Subjected to chemical analysis and mechanical tests as required in ASTM A6 and A370 including Charpy V-Notch

b) Subjected to chemical analysis and mechanical tests as required in ASTM A20 and A333 including Charpy V-Notch

c) Subjected to Brinell hardness analysis and mechanical tests as required in ASTM A6 and A370 including Charpy V-Notch

d) Subjected to Brinell hardness analysis and mechanical tests as required in ASTM A20 and A333 including Charpy V-Notch


4. Under what condition does API-653 require two tension specimens shall be taken at right angles to each other from a corner of each plate? One of those specimens must meet the specification requirements.

a) When the direction of rolling is not definitely known

b) When the welding will be conducted at a temperature less than 32F

c) When the plate is not a full size plate and may be installed with the grain running vertical

d) When the material is not a P-1 material


5. Even when a material is identified, all shell plates and bottom plates welded to the shell shall meet what minimum requirements?

a) The chemistry and mechanical properties of material specified for the application with regard to thickness and design temperature given in ASME Section II, Part A

b) The chemistry and mechanical properties of material specified for the application with regard to thickness and design temperature given in API Standard 650

c) The chemistry and mechanical properties of material specified for the application with regard to thickness and design temperature given in the owner/operator's engineering design

d) The chemistry and mechanical properties of material specified for the application with regard to thickness and design temperature given in the contract for the tank repair, alteration, or reconstruction


6.Is it permissible to reuse existing rolled structural shapes? If so what specification applies?

a) Yes, existing rolled structural shapes shall meet the requirement of ASTM A-20 as a minimum

b) Yes, existing rolled structural shapes shall meet the requirement of ASTM A-370 as a minimum

c) Yes, existing rolled structural shapes shall meet the requirement of ASTM A-6 as a minimum

d) Yes, existing rolled structural shapes shall meet the requirement of ASTM A-7 as a minimum

Reference: API-653, Paragraph 5.3.2

7. Flange material must meet the minimum requirements of the material specifications of the current applicable standard.

a) True

b) False


8. Fasteners shall meet the material specifications of the current applicable standard.

a) True

b) False


9. If existing plates are to be used to reconstruct the tank, they shall be checked for which of the following?

a) Chemical compatibility with other plates used in the reconstruction

b) Excessive corrosion and pitting

c) Mechanical strength including impact properties

d) Inadequately reinforced openings


Answers to API-653 Section 5, Materials


1C

2D

3A

4A

5B

6D

7B

8A

9B





Section 6 Design Considerations for Reconstructed Tanks

1. Design considerations other than normal product loading shall be specified by the _____.

a) Organization performing the reconstruction

b) Authorized Inspector

c) Owner/operator

d) Registered professional engineer contracted by the repair organization

Reference API 653 Paragraph 6.1

2.Weld joint details shall meet the requirements of which of the following?

a) API Standard 650

b) ASME Section IX only

c) The applicable standard

d) AWS D1.1 Structural Welding Code

Reference API 653 Paragraph 6.2.1

3. The thickness to be used for each shell course when checking tank design shall be based on:

a) Measurements taken within 30 days prior to relocation

b) Measurements taken within 60 days prior to relocation

c) Measurements taken within 120 days prior to relocation

d) Measurements taken within 180 days prior to relocation


4. The maximum liquid level for hydrostatic test shall be determined by using which of the following?

a) The nominal thickness of each shell course at the time of original construction

b) The actual thickness measured for each shell course

c) The anticipated thickness for each shell course at the time of next thickness measurements

d) Twice the anticipated thickness for each shell course at the time of next thickness measurements


5. The joint efficiency and allowable stress levels for existing welded joints that are not to be removed and replaced shall be based on which of the following?

a) Original construction standard

b) Original degree and type of inspection

c) Current construction standard

d) Current degree and type of inspection


6. Replacement and new penetrations shall be designed, detailed, welded, and examined to meet what requirements?

a) The current applicable standard

b) The original standard of construction

c) The requirements of the Authorized Inspector

d) The requirements of the owner/operator


7. Existing penetrations shall be evaluated for compliance with what requirements?

a) The current applicable standard

b) The original standard of construction

c) The requirements of the Authorized Inspector

d) The requirements of the owner/operator


8. With regard to seismic design, reconstructed tanks shall be built to meet the stability requirements of:

a) The requirements of the owner/operator

b) The requirements of the Authorized Inspector

c) The original standard of construction

d) The applicable standard

Reference API 653 Paragraph 6.8

Answers to API-653 Section 6, Design


1C

2C

3D

4B

5B

6A

7B

8D





Section 7 Tank Repair and Alteration

1. The basis for repairs and alterations shall be equivalent to which of the following?

a) API-653

b) API-650

c) API-510

d) API-570

Reference API-653, Paragraph 7.1.1

2. The minimum dimension for a replacement shall plate shall be _____ inches or ____ times the thickness of the replacement plate whichever is ______.

a) 12, 12, greater

b) 12, 12, lesser

c) 18, 18, greater

d) 18, 18, lesser

Reference API-653, Paragraph 7.2.2.1

3. Unless an entire shell plate is replaced, the replacement plate may be circular, oblong, square or rectangular provide the corners are

a) Provided with a radius of at least 1 inch

b) Provided with a radius of at least 3% of the short dimension of the plate

c) Provided with a radius of at least 3 inches

d) Provided with rounded corners


4. Prior to welding the new vertical joints, the existing horizontal joints shall be cut for a minimum distance of _____ inches beyond the new vertical joints.

a) Six

b) Eight

c) Twelve

d) Sixteen


5. Vertical joints shall be welded before the horizontal joints.

a) True

b) False


6. For existing shell plates over thick, the outer edge of the butt weld, attaching the replacement shell plate shall be at least _____ times the weld thickness or _____ inches whichever is greater from the outer edge of any existing butt-welded shell joints.

a) 12, 10

b) 10, 12

c) 8, 10

d) 10, 8


7. For existing shell plates thick and less, the outer edge of the butt weld, attaching the replacement shell plate may be reduced to _____ inches from the outer edge of vertical joints or _____ inches from the outer edge of horizontal joints.

a) 10, 8

b) 9, 6

c) 6, 9

d) 6, 3


8. For existing shell plates over thick, the outer edge of the butt weld, attaching the replacement shell plate shall be at least _____ times the weld size or _____ inches, whichever is greater, from the edge (toe) of the fillet weld attaching the bottom shell course to the bottom. This rule does not apply if the replacement shell plate extends to and intersects with the bottom-to-shell joint at approximately _____ degrees.

a) 8, 10, 45

b) 8, 10, 90

c) 8, 10, 60

d) There are no exceptions


9. The edge of any vertical weld joint attaching a replacement plate shall be at least how far from the edge of the weld joint in the annular plate ring or sketch plate?

a) Eight inches

b) Ten inches

c) Twelve inches

d) Six inches


10. Lapped patch shell repairs are an acceptable form of repair for butt-welded, lap-welded, and riveted tank shell only when specified by:

a) The Authorized Inspector

b) Repair organization

c) The insurance company

d) The owner/operator


11. Lapped patch shell repairs are not permitted on shell courses exceeding what thickness?

a) inch

b) inch

c) 1 inch

d) 1 inch


12. When a lapped patch shell repair is used, what is the minimum thickness permitted for the repair plate?

a) Not less than .25 inch

b) Not less than .1875 inch

c) Not less than .50 inch

d) Not less than .375 inch


13. Repair plates for lapped patch repairs may square or rectangular in shape. These plates must be provided with a corner radius of at least what dimension?

a) They shall be rounded to a minimum radius of 1 inch

b) They shall be rounded to a minimum radius of 2 inches

c) They shall be rounded to a minimum radius of 3 inches

d) They shall be rounded to a minimum radius of 4 inches


14. The maximum dimension of the lapped patch repair plate vertically and horizontally shall not exceed:

a) 24 inches vertically and 36 inches horizontally

b) 36 inches vertically and 48 inches horizontally

c) 48 inches vertically and 72 inches horizontally

d) There are no maximum dimensions


15. The minimum lapped patch repair plate dimension is what length?

a) 6 inches

b) 8 inches

c) 10 inches

d) 12 inches


16. Is it permissible to install a shell opening and its reinforcement within a properly designed lapped patch shell repair?

a) Yes

b) No


17. When a lapped patch repair plate is used to reinforce the thickness of a shell, which of the following is correct?

a) The repair plate thickness shall be based on the latest edition of API-650 and 653 using a joint efficiency not exceeding 0.35

b) The repair plate thickness shall be based on the applicable standard of construction and API Standard 653 using a joint efficiency not exceeding 0.35

c) The repair plate thickness shall be based on the latest edition of API-650 and 653 using a joint efficiency not exceeding 0.70

d) The repair plate thickness shall be based on the applicable standard of construction and API Standard 650 using a joint efficiency not exceeding 0.70


18. With regard to the thickness of the repair plate at the perimeter of the repair plate, when a lapped patch repair plate is used to reinforce the thickness of a shell, which of the following is correct?

a) The repair plate shall not exceed the thickness of the shell plate by more than 1/4th but no more than 1/8th inch. The maximum repair plate thickness is 1/2inch.

b) The repair plate shall not exceed the thickness of the shell plate by more than 1/3rd but no more than 1/4th inch. The maximum repair plate thickness is 1/2inch.

c) The repair plate shall not exceed the thickness of the shell plate by more than 1/3rd but no more than 1/8th inch. The maximum repair plate thickness is 1/2inch.

d) The repair plate shall not exceed the thickness of the shell plate by more than 1/4th but no more than 1/3rd inch. The maximum repair plate thickness is 1/2inch.


19. Lapped patch repair plates may be used to repair small leaks or minimize the potential of leaks from isolated pitting. The requirements for thickness and design are the same as for reinforcement of shell thickness. This type of repair may not be used to repair small leaks if what condition(s) exists?

a) The leak is located anywhere in the first shell course within 12 inches of a vertical joint

b) The leak of pit is in an area of the shell where there is a product to atmosphere interface

c) There is a possibility of severe environmental impact should the repair fail

d) If exposure of the fillet weld to the product would produce crevice corrosion or if a corrosion cell is likely to occur between the shell plate and the repair plate


20. An alteration to a tank shell by the addition of new plate material shall be performed in accordance with what standard?

a) Current API 650 and latest addenda

b) API 650 edition and addenda applicable at the time of original tank construction

c) Applicable standard

d) Tanks may not be altered by increasing height

Reference API-653, Paragraph 7.5

21. Repairs to existing shell penetrations shall be in accordance with

a) API Standard 650

b) API Standard 653

c) API Standard 510

d) National Board Inspection Code


22. API 653 permits the addition of reinforcing plates to existing un-reinforced nozzles. What requirement is necessary to add this reinforcement to the inside of the tank?

a) The reinforcement plate may not be added to the inside of the plate

b) A telltale hole shall be drilled through the shell opposite the reinforcement plate

c) The reinforcement plate is the same material as the nozzle and is attached to the nozzle by full penetration weld

d) Sufficient nozzle projection exists


23. The addition or replacement of shell penetrations shall be in accordance with

a) API-650

b) API-650 and API 653

c) API-650 and API 510

d) API-650 and AMSE Section VIII, Division 2


24. Installation or replacement of shell penetrations greater than 2 inches shall be installed with the use of an insert plate if what condition(s) exists?

a) The penetration is no closer than 12 inches to an existing penetration

b) The shell plate is greater than thickness and the shell plate material does not meet current metal temperature criteria

c) The penetration is no closer than 10 inches to an existing penetration

d) The shell plate is greater than 3/16 thickness and the shell plate material does not meet current metal temperature criteria


25. An 8 inch diameter penetration is to be installed in a shell which requires an insert plate. What is the minimum permitted diameter of the insert plate?

a) Eight inches

b) Twelve inches

c) Sixteen inches

d) Twenty inches

Reference API-653, Paragraph 7.8.2(a)

26. An insert plate containing an opening with a reinforcing plate is to be installed in a tank. The reinforcing plate diameter is thirty-two inches. What is the minimum diameter of the insert plate?

a)The insert plate must be 32 inches in diameter

b)The insert plate must be 44 inches in diameter

c)The insert plate must be 32 inches in diameter plus the diameter of the opening

d)The insert plate must be 32 inches in diameter plus twice the diameter of the opening

Reference API-653, Paragraph 7.8.2(b)

27. If an integral reinforcement design is used, the thickness of the insert plate, at its periphery and for a distance of 2t from the edge of the weld, shall be the same thickness as the shell. If it is not, the insert plate shall have a ______ taper to match the shell plate thickness.

a) 1:2

b) 1:3

c) 1:4

d) 1:5

Reference API-653, Paragraph 7.8.2(c)

28. When it is necessary to install a new tank bottom above an existing bottom, it may be necessary to alter existing shell penetrations. This procedure may require the existing reinforcing plate to be removed and a new reinforcement plate added. This is not permitted when what condition exists?

a) The assembly was originally hardness tested

b) The existing assembly was not impact tested

c) The existing assembly was fabricated from re-claimed material

d) The existing assembly was stress relieved


29. New reinforcing plates shall be installed in accordance with Fig. 7-2a of API-653. In order to maintain weld spacing, what shape reinforcing plate is permitted?

a) Oval

b) Diamond

c) Tombstone

d) Circular is the only permitted shape


30. No welding or weld overlays are permitted within the Critical Zone except for welding of widely scattered pits, cracks in the bottom plates, the shell-to-bottom weld, or where the bottom or annular plate is being replaced.

a) True

b) False

Reference API-653, Paragraph 7.10.1.2.1

31. API Standard 653 defines the Critical Zone for repairs to tank bottoms as what?

a) That portion of the bottom or annular plate within 3" from the inside edge of the shell, measured radially inward

b) Within the annular plate ring, within 12 inches of the shell, or within 12 inches of the inside edge of the annular plate ring

c) That portion of the bottom or annular plate within 6" from the inside edge of the shell, measured radially inward

d) Within the annular plate ring, within 3" of the shell, or within 12 inches of the inside edge of the annular plate ring


32. If more extensive repairs are required within the Critical Zone than those listed in 7.10.1.2, what must be done with the bottom plate?

a) As long as the repairs do not involve the bottom plate, nothing needs to be done

b) The bottom plate welded to the shell shall be cut out and a new plate installed

c) The bottom plate shall be subjected to suitable nondestructive examination to ensure it has not be adversely affected by the repair

d) The bottom plate and the bottom shell course shall be replaced as an assembly


33. When it is necessary to install a new bottom plate over an existing bottom plate, a suitable ______ material cushion such as sand, gravel or concrete shall be used between the old bottom and the new bottom.

a) Drainage

b) Compacted

c) Non-corrosive

d) Non-conductive


34. When a new tank bottom has been installed in a floating roof tank, what consideration must given to the floating roof level?

a) The floating roof will find its own level

b) The support legs can be jacked up or shortened by the same amount as the thickness of the cushion and new bottom plate

c) The support legs can be jacked up or shortened by the same amount as the thickness of the cushion

d) The support legs can be jacked up or shortened by the same amount as the thickness of the new bottom plate


35. Which of the following is not acceptable when removing an existing tank bottom, with regard to the separation of the shell from the tank bottom?

a) Cutting the shell parallel to the tank bottom a minimum of above the bottom to shell weld

b) Removing the entire shell to bottom attachment weld including penetration and heat affect zone

c) Removing the entire shell to bottom attachment weld by arc gouging and/or grinding

d) Cutting the shell parallel to the tank bottom a minimum of above the bottom to shell weld

Reference API-653, Paragraph 7.10.2.2(a) and (b)

36. For installation of a new tank bottom in a tank with shell plates of unknown toughness, not exempted in Table 10-1 of API-653, new welds in the bottom or annular ring shall be spaced at least the greater of _____ inches or ____t from existing vertical weld joints in the bottom shell course. (t is the thickness of the bottom shell course)

a) three, five

b) six, five

c) five, three

d) five, six


37.What is the minimum thickness of new roof plates for supported cone roofs?

a) 7/16

b) 5/16

c) 3/16

d) 1/16


38. The nominal thickness of new roof plates for self-supporting roofs shall be equal to or greater than _____ inch not to exceed _____ inch.

a) 1/4th, 5/8th

b) 5/16th, 1/2

c) 3/16th, 5/16thd) 3/16th, 1/2

Reference API-653, Paragraph 7.11.2.1 and API-650 3.10.5 or 3.10.6

39. Repairs to internal floating roofs shall be made in accordance with the original construction drawings. To what requirements shall repairs be made if the original construction drawings are not available?

a) The original construction standard

b) Appendix H of API Standard 650

c) Appendix G of API Standard 650

d) Appendix C of API Standard 650


40. To minimize evaporation losses and reduce potential hazard to workers, no more than ____ of the roof seal system should be out of an in-service tank at one time.

a) One-eighth

b) One-fourth

c) One-half

d) Three-quarters


41. Mechanical damage to floating roof perimeter seals shall be repaired or replaced. How are buckled parts handled?

a) They shall be replaced

b) They may be straightened in place

c) They may be heated and bent back into position

d) They may be removed straightened and re-installed


42. With regard to installation of primary and secondary seals, what must be done if the roof rim thickness is less than 0.10 inch.

a) The roof rim shall be thoroughly inspected for damage and corrosion, if it is satisfactory then nothing further needs to be done

b) It shall be replaced. The new roof rim shall be 3/16 inch thickness minimum

c) It shall be replaced. The new roof rim shall be 1/4 inch thickness minimum

d) The tank must be condemned and dismantled


43. What is the maximum hot tap connection permitted in an in-service tank with a minimum shell thickness of 3/8 inch? The material is of recognized toughness.

a)NPS 6

b)NPS 8

c)NPS 14

d)NPS 18

Reference API-653, Paragraph 7.14.1.1(a) and Table 7-1

44. The owner/operator requires a connection to be made in an in-service tank. The shell material is of unknown toughness and the thickness is 1.25. The minimum design metal temperature is 45(F. What is the maximum diameter hot tap connection that may be installed in this tank?

a)NPS 18

b)NPS 14

c)NPS 8

d)NPS 4

Reference API-653, Paragraph 7.14.1.1(b)(1) and Fig. 7-6

45. The minimum height of tank liquid relative to the hot tap location shall be at least ______ during the hot tapping operation.

a) The tank liquid shall be at least 3 feet below the hot tap location

b) The tank liquid shall be at least 1 foot above the hot tap location

c) The tank liquid shall be at least 3 feet above the hot tap location

d) The tank liquid shall be at least 1 foot below the hot tap location


46. It is permissible to perform hot taps on the roof of a tank or within the gas/vapor space.

a)True

b)False


47. The owner/operator requires an NPS 3 nozzle to be installed in an in-service tank. The tank is 110 feet in diameter, 60 feet maximum fill height, shell thickness at the point of hot tap is .75, and the material is of unknown toughness with a minimum design metal temperature of 38(F. This nozzle is to be installed adjacent to an existing nozzle. What is the minimum spacing between these nozzles?

a) Minimum distance is 22.24

b) Minimum distance is 9.08

c) Minimum distance is 19.08

d) Minimum distance is 2.24


48. When installing a pipe nozzle into an in-service tank, how shall the pipe nozzle be prepared?

a) The pipe nozzle must be cut to the contour of the tank and prepared for full fillet welding

b) The pipe nozzle shall be cut to the contour of the tank and beveled to a depth of not more than 1/3 the nozzle thickness to ensure partial penetration groove welding

c) The pipe nozzle shall be cut to the contour of the tank and beveled to a depth of not less than 1/3 the nozzle thickness to ensure partial penetration groove welding

d) The pipe nozzle shall be cut to the contour of the tank and beveled from the outside for a full penetration weld


49. After the reinforcing pad is installed, the pad shall be subjected to a pneumatic test.

a) True

b) False


50. After the valve has been installed on the flange, a pressure test of at least ______ shall be performed on the nozzle prior to mounting the hot tap machine.

a) The same pressure as the pneumatic test of the reinforcing pad

b) 1.25 times the hydrostatic head

c) 1.5 times the hydrostatic head

d) 2.0 times the hydrostatic head (to account for the added stress of the machine)


Answers to API-653 Section 7, Repair/Alteration


1B

2A

3D

4C

5A

6C

7D

8B

9C

10D

11A

12B

13B

14D

15A

16B

17B

18C

19D

20C

21A

22D

23B

24B

25D

Answers to API-653 Section 7, Repair and Alteration Continued:


26B

27C

28D

29C

30A

31A

32B

33C

34B

35D

36A

37C

38D

39C

40B

41A

42B

43C

44D

45C

46B

47A

48D

49A

50C





Section 8 Dismantling and Reconstruction

1. Bottom plates that will be reused shall be cut by de-seaming of lap-welds or by cutting alongside of the remaining welds at a minimum of _______ away from existing welds.

a) One inch

b) Two inches

c) Four inches

d) Six inches


2. Shell plates may be cut by any of the following methods except

a) Shell rings thick or thinner can be dismantled by cutting through the weld without removing the heat affected zone

b) Cuts made a minimum of 6 away from existing welds except where cuts cross existing welds

c) Cuts made a minimum of 2 away from existing welds except where cuts cross existing welds

d) Any shell ring may be dismantled by cutting out existing weld seams and the heat affected zone of the weld


3.API-653 requires that new vertical joints in adjacent shell courses not be in alignment. What is the minimum offset dimension of these joints?

a)Vertical joints shall be offset a minimum of 5 inches or 5t which ever is greater

b)Vertical joints shall be offset a minimum of 5t where t is the plate thickness of the thicker course at the point of offset

c)Vertical joints shall be offset a minimum of 5t where t is the plate thickness of the thinner course at the point of offset

d)Vertical joints shall be offset a minimum of 5 inches or 5t which ever is less


4. Roof plates shall be cut by de-seaming of lap-welds or by cutting alongside of the remaining welds at a minimum of _______ away from existing welds.

a) One inch

b) Two inches

c) Four inches

d) Six inches


5. In the reconstruction of aboveground storage tanks, welding shall be by any of the following welding processes except.

a) Submerged arc welding

b) Oxyfuel

c) Gas metal-arc

d) Forging

Reference API-653, Paragraph 8.4.2.2 and API-650 5.2.1

6. No welding of any kind may be performed when the surfaces to be welded are wet from rain, snow, or ice. When rain or snow is falling or during high wind conditions, welding is permitted provided:

a) The welder is secured to an anti-fall device and the work is properly grounded

b) The welder has agreed to work in such conditions

c) The welder and the work are properly shielded

d) The owner/operator takes full responsibility for the safety of the welder and the quality of the welds


7. According to API-653, no welding is permitted when the temperature of the base metal is below what value?

a) Base metal temperature below -20(F

b) Base metal temperature below 0(F

c) Base metal temperature below 20(F

d) Base metal temperature below 30(F


8. If the base metal is greater than 1 thickness or the temperature of the base metal is between 0(F and 32(F what requirement does API-653 stipulate?

a) The base metal within 3 inches of the weld area shall be heated to a temperature that is warm to the hand (approximately 180(F)

b) The base metal within 8 inches of the weld area shall be heated to a temperature that is warm to the hand (approximately 140(F)

c) The base metal within 3 inches of the weld area shall be heated to a temperature that is warm to the hand (approximately 140(F)

d) The base metal within 8 inches of the weld area shall be heated to a temperature that is warm to the hand (approximately 180(F)


9. What is the maximum permissible undercut of the base metal for vertical joints?

a) 1/64

b) 1/32

c) 1/19

d) 1/16


10. What is the maximum permissible undercut of the base metal for horizontal joints?

a) 1/64

b) 1/32

c) 1/19

d) 1/16


11. What is the maximum weld reinforcement thickness permitted on each side of the plate for a plate, which is 7/8 thick?

Vertical jointsHorizontal joints

a)3/321/8

b)1/83/16

c)3/161/4

d)1/45/16

Reference API-653, Paragraph 8.4.2.6 & Table 8-1

12. Tack welds used in the assembly of vertical joints in tank shells may remain in place when the joints are welded manually provided:

a) They are properly cleaned of all weld slag

b) They are sound

c) Liquid Penetrant or Magnetic Particle examination is performed

d) They shall not remain


13. What are the requirements for making tack welds according API-653?

a) If the tack weld is to be removed, it must be made using qualified weld procedure and qualified welder

b) If the tack weld is to remain in place, it must be made using qualified weld procedure and qualified welder

c) If the tack weld is to remain in place, it may be made using any weld procedure acceptable to the owner/operator

d) If the tack weld is to be removed, it may be made by any welder wishing to gain experience provided the process is the SMAW process


14. All coatings must be removed from the weld area prior to welding except weldable primer coatings. What must done if these primer coatings are used?

a) Weldable primer coatings must also be removed

b) If the coating is applied by brush it may remain provided the application is performed to a written procedure

c) They shall be included in welding procedure qualification tests for brand, formulation, and maximum thickness of primer applied

d) They shall be included in welding procedure qualification tests for the method of application either by brushing or by spraying or a combination of the two.


15. When welding tank bottoms, when should the shell-to-bottom weld be completed?

a) This joint (except for door sheets) can be welded as soon as the bottom plates are laid out and welded

b) This joint (except for door sheets) shall be welded as soon as the first bottom weld joint is completed to prevent distortion

c) This joint (except for door sheets) shall be welded as work progresses around the tank bottom

d) This joint (except for door sheets) shall be completed before the welding of bottom joints


16. What is the maximum permissible misalignment of vertical joints in shell plates that are .9375 thick?

a) .125

b) .09375

c) .009375

d) .0125


17 What is the maximum permissible misalignment of vertical joints in shell plates that are .625 thick?

a) .0625

b) .00625

c) .125

d) .0125


18. Vertical joints shall be completed before the lower horizontal weld is made.

a) True

b) False


19. In completing horizontal joints, what is the maximum projection of the upper plate, beyond the face of the lower plate, at any point for plate thickness of 1.125

a) .25

b) .225

c) .125

d) .0125


20. When welding horizontal and vertical joints constructed of material that is over 1.5 thick, based on the thickness of the thicker part, what is the required preheat temperature?

a) Preheating is not required

b) 140(F

c) 200(F

d) 300(F


21. When shall measurements be taken to verify tolerances of reconstructed tanks?

a) After hydrostatic testing

b) Before hydrostatic testing

c) After lay out of all plates

d) After fit-up and tack welding used for alignment purposes


22. What is the maximum out-of-plumbness of the top of the shell relative to the bottom of the shell of a tank with a total height of 62.25 feet?

a) 7.47

b) .6225

c) 6.25

d) 5


23. An aboveground storage tank is 115 feet in diameter. What is the maximum or minimum radius permitted measured at one foot above the shell-to-bottom weld?

MaximumMinimum

a)115.75114.25

b)690.75689.25

c)1380.751379.25

d)115.5114.5


24. An aboveground reconstructed tank is 126.5 feet in diameter. What is the maximum or minimum radius permitted measured at the second shell course up from the bottom?

MaximumMinimum

a)759.75758.25

b)761.25756.75

c)1520.251515.75

d)128.75124.25


25. Peaking shall not exceed . This is measured using a horizontal sweep board of what dimensions?

a) The sweep board shall be 48 long and made to the true outside radius of the tank

b) The sweep board shall be 48 long and made to the true inside radius of the tank

c) The sweep board shall be 36 long and made to the true outside radius of the tank

d) The sweep board shall be 36 long and made to the true inside radius of the tank


26. Banding shall not exceed ____ with a vertical 36 long sweep board.

a) One half inch

b) Three quarter inch

c) One inch

d) One and one eighth inch


27. The top of the concrete ringwall of a reconstructed tank, that is 115 feet in diameter, must be level within ( 1/8 in any 30 feet of circumference. What is the tolerance measured from the average elevation?

a) (1/8

b) (3/16

c) (1/2

d) (1/4

Reference API-653, Paragraph 8.5.6.2(a)

28. Where concrete ringwalls are not provided, the foundation under the shell shall be level to within what tolerances?

a) (1/8 in any 30 of the circumference and (1/2 in the total circumference measured from the average elevation

b) (1/8 in any 10 of the circumference and (1/2 in the total circumference measured from the average elevation

c) (1/8 in any 10 of the circumference and (1/4 in the total circumference measured from the average elevation

d) (1/8 in any 30 of the circumference and (1/4 in the total circumference measured from the average elevation

Reference API-653, Paragraph 8.5.6.2(b)

29. For foundations specified to be sloped from a horizontal plane, the actual elevation shall not deviate from the calculated differences by more than which of the following where concrete ringwalls are provided?


b) (1/8 in any 10 of the circumference and (1/2 in the total circumference


d) (1/8 in any 30 of the circumference and (1/4 in the total circumference

Reference API-653, Paragraph 8.5.6.3(a)

30.For foundations specified to be sloped from a horizontal plane, the actual elevation shall not deviate from the calculated differences by more than which of the following where concrete ringwalls are not provided?


b) (1/8 in any 10 of the circumference and (1/2 in the total circumference


d) (1/8 in any 30 of the circumference and (1/4 in the total circumference

Reference API-653, Paragraph 8.5.6.3(b)

Answers to API-653 Section 8, Dismantling & Reconstruction


1b

2c

3b

4b

5d

6c

7b

8c

9a

10b

11b

12d

13b

14c

15d

16b

17a

18a

19c

20c

21b

22d

23b

24b

25c

26c

27d

28b

29d

30b





Section 9 - Welding

1. Welding procedure specifications and welders and welding operators shall be qualified in accordance with __________.

a) Original code of construction

b) Owner/operators specification

c) Section IX of the ASME Code

d) Repair organizations specifications


2. According to API Standard 653, if the material specification for the steel from an existing tank is unknown or obsolete what must be done?

a) The material can not be used for tank reconstruction

b) Test coupons for the WPS shall be taken from the actual plate to be used

c) Test coupons for the WPS may be taken from a similar material of known specification

d) Test coupons for the WPS shall only be taken from weld filler metal and not from the base metal


3. Each welder and welding operator shall be assigned ________.

a) Only one joint to ensure traceabilitiy

b) A specific welding machine

c) An identifying number, letter, or symbol

d) Weld joints on only one side of the tank


4.How does each welder and welding operator identify the welds produced by them?

a) Each welder and welding operators identification mark shall be hand or machine stamped adjacent to each completed weld.

b) Each welder and welding operator shall inform the owner/operator which welds he or she completed

c) Each welder and welding operator shall show the inspector exactly which welds they completed

d) Each welder and welding operator shall inform the owner/operator which welds they will be making prior to the start of such welding


5.At what intervals must the welder and welding operators identification be stamped adjacent to the completed welds?

a) Identification shall be at intervals not to exceed 9 feet

b) Identification shall be at intervals not to exceed 7.5 feet

c) Identification shall be at intervals not to exceed 6 feet

d) Identification shall be at intervals not to exceed 3 feet


6. In lieu of stamping, a record may be kept that identifies the welder or welding operator for each welded joint.

a) True

b) False


7. What welds do not require welders identification?

a) All welds require identification

b) Vertical welded joints which are located within the final shell course since this course will be subjected to relatively low stresses

c) Roof plate welds and flange-to-nozzle-neck welds

d) Roof plate welds and bottom plate welds


Answers to API-653 Section 9, Welding


1C

2B

3C

4A

5D

6A

7C





Section 10 Examination and Testing

1. Nondestructive examination procedures, qualifications, and acceptance criteria is required for VT, MT, UT, PT, and RT methods and must be in accordance with what Code or Standard?

a) ASME Code Section V, Nondestructive examination

b) API Standard 650 only

c) API Standard 650 and the supplements given in API-653

d) Owner/operators specifications


2. Personnel performing nondestructive examination shall be qualified in accordance with _____.

a) API Standard 650 and the supplemental requirements of API-653

b) ASME Code Section V, Nondestructive Examination

c) SNT-TC-1A

d) The owner/operators specifications


3. When it is necessary to install a hot tap connection or add a reinforcing plate to an existing un-reinforced penetration, API 653 requires what type, extent, and purpose of examination.

a) Magnetic particle examination for slight sub-surface discontinuities shall be performed in an area equal to twice the diameter of the opening

b) Radiographic examination for cracking shall be performed in the immediate area

c) Ultrasonic examination for cracking shall be performed in the immediate area

d) Ultrasonic examination for lamination shall be performed in the immediate area


4. Completed welds attaching nozzle neck to shell, and reinforcing plate to shell and nozzle neck, shall be examined by _______.

a) Ultrasonic or Radiography

b) Magnetic Particle or Liquid Penetrant

c) Visual examination or Liquid Penetrant

d) Ultrasonic or Magnetic Particle


5. How and when does API Standard 653 require the examination of welds of completed stress relieved assemblies?

a) Completed welds of stress relieved assemblies shall be examined visually only after stress relief and hydrostatic test

b) Completed welds of stress relieved assemblies shall be examined visually as well as by ultrasonic methods after stress relief but before hydrostatic test

c) Completed welds of stress relieved assemblies shall be examined visually as well as by magnetic particle or liquid penetrant methods after stress relief but before hydrostatic test

d) Completed welds of stress relieved assemblies shall be examined visually or by radiography after stress relief but before hydrostatic test


6.Completed butt welds between insert plates and the shell require what type and extent of examination?

a) Complete radiography

b) Spot Radiography

c) Random Radiography

d) Random Spot Radiography


7.In repairing butt weld flaws, what type and extent of examination is required by API-653?

a) Random examination by radiography or ultrasonic methods of the full length of repair

b) Examined full length of the repair by liquid penetrant or magnetic particle methods

c) Examined at three foot intervals by radiography or ultrasonic methods

d) Examined full length of the repair by radiography or ultrasonic methods


8.Completed repairs of fillet welds shall be examined over their full length by the appropriate nondestructive method listed in API-653.

a)True

b)False


9.With regards to new welds attaching shell plate to shell plate, what method(s) of examination is/are required on the completed weld?

a) Visual

b) Visual and Radiography

c) Visual and magnetic particle or liquid penetrant

d) Visual and ultrasonic


10.With regards to new welds attaching shell plate to shell plate for plate thickness greater than one inch, what additional extent and method of examination is required by API-653?

a) The back gouged surface of the root and final pass (each side) shall be examined for its complete length by the Inspector

b) The back gouged surface of the root and final pass (each side) shall be examined for its complete length visually

c) The back gouged surface of the root and final pass (each side) shall be examined for its complete length by magnetic particle or liquid penetrant

d) The back gouged surface of the root and final pass (each side) shall be examined for its complete length by ultrasonic


11.New welding on the shell-to-bottom joint shall be inspected for its entire length by _____ and _______ or ________.

a) Visual examination, liquid penetrant , magnetic particle

b) Right-angle vacuum box and solution film, light diesel oil

c) Visual examination, ultrasonic, eddy current

d) Visual examination, wet fluorescent magnetic particle, helium tracer gas


12.In applying light diesel oil to the opposite side of the first pass of new shell-to-bottom joints, how long must the oil remain on the weld and what is the weld inspected for?

a) The oil shall be allowed to stand at least four hours and the weld inspected for wicking action

b) The oil shall be allowed to stand at least three hours and the weld inspected for wicking action

c) The oil shall be allowed to stand at least two hours and the weld inspected for wicking action

d) The oil shall be allowed to stand at least one hour and the weld inspected for wicking action


13.The existing weld at the shell-to-bottom joint shall be examined visually and magnetic particle or liquid penetrant methods, for the full length under a welded-on patch plate. How much additional shell-to-bottom joint must be examined?

a)Three inches on each side of the patch plate

b)Six inches on each side of the patch plate

c)nine inches on each side of the patch plate

d)twelve inches on each side of the patch plate


14.How and to what extent are newly welded bottom joints tested?

a) Newly welded bottom joints shall be tested their entire length using liquid penetrant

b) Newly welded bottom joints shall be tested their entire length using a vacuum box and a solution film, or a tracer gas and detector

c) Newly welded bottom joints shall be tested their entire length using visual and ultrasonic examination

d) Newly welded bottom joints shall be tested their entire length using wet fluorescent magnetic particle examination


15.What are the requirements, regarding examination, of a welded-on patch plate in the critical zone?

a)The final weld shall be examined by radiography over its entire length

b)Root and final pass shall be examined by radiography over its entire length

c)The root and final pass shall be examined visually over its entire length

d)The root and final pass shall be examined visually and by magnetic particle of liquid penetrant method over its entire length


16.API-653 requires the number and location of radiographs to in accordance with API-650. In addition, API-653 requires how many and what location for new or repaired shell vertical joints?

a) For new or repaired shell vertical joints one radiograph shall be taken in each fifty foot length

b) For new or repaired shell vertical joints one radiograph shall be taken in each twenty-five foot length

c) For new or repaired shell vertical joints one radiograph shall be taken in every joint

d) For new or repaired shell vertical joints one radiograph shall be taken in every other joint


17.API-653 requires the number and location of radiographs to in accordance with API-650. In addition, API-653 requires how many and what location for new or repaired shell horizontal joints?

a) For new or repaired shell horizontal joints one radiograph shall be taken in each twenty-five feet of horizontal joint including those required at intersections of vertical and horizontal joints

b) For new or repaired shell horizontal joints one radiograph shall be taken in each twenty-five feet of horizontal joint not including those required at intersections of vertical and horizontal joints

c) For new or repaired shell horizontal joints one radiograph shall be taken in each fifty feet of horizontal joint including those required at intersections of vertical and horizontal joints

d) For new or repaired shell horizontal joints one radiograph shall be taken in each fifty feet of horizontal joint not including those required at intersections of vertical and horizontal joints


18.API-653 requires two radiographs to be taken at each new or replacement intersection between vertical and horizontal joints. One to comply with the requirement for vertical joints and one to comply with the requirements for horizontal joints.

a) True

b) False


19.For reconstructed tanks, each butt-welded annular plate joint shall be radiographed in accordance with which of the following?

a) API-650

b) ASME - Section V

c) API-653 and API-575

d) Owner/operator's specifications


20.For reconstructed tanks, radiographic examination is required for what percentage of all junctions of new welds over existing seams?

a) 100%

b) 75%

c) 50%

d) 25%


21.Radiographic examination is required for new and replaced shell insert plate and door shell welds. What are the minimum number and location of such radiographs?

a) Circular plates - four radiographs are required, one at each quadrant

b) Square or rectangular - two radiographs are required in each vertical joint and one in a horizontal joint

c) Circular plates - one radiograph and for square or rectangular - one in a vertical joint, one in a horizontal joint, and one in each corner

d) Circular and square of rectangular new or replaced insert plates require 100% examination


22.What is the minimum diagnostic length of each radiograph?

a) The minimum diagnostic length of each radiograph shall be six inches

b) The minimum diagnostic length of each radiograph shall be three inches

c) The minimum diagnostic length of each radiograph shall be nine inches

d) The minimum diagnostic length of each radiograph shall be twelve inches


23.If the radiograph of an intersection between a new and old weld discloses discontinuities, which are unacceptable by current standards, what must be done?

a) The unacceptable welds must be removed and made in accordance with current standards

b) The unacceptable welds shall be repaired to bring them in to compliance

c) The existing welds may be evaluated according to the original standard of construction

d) The existing welds shall be evaluated using the acceptance criteria of ASME Section VIII


24.Radiographs and radiograph records of all repaired welds shall be marked with what letter(s)?

a) "RW" (Repaired Weld)

b) "WR" (Weld Repair)

c) "A" (Accepted repair)

d) "R"


25.Hydrostatic testing is required for reconstructed tanks and tanks that have undergone major repairs or alterations. What is the minimum length of time the hydrostatic test must be held?

a) The time is up to the discretion of the Inspector

b) Twenty-four hours

c) The time is up to the discretion of the owner/operator

d) Twelve hours


26.Major repair and major alteration is defined by API-653 by which of the following?

a) Cutting, addition, removal and/or replacement of the annular plate ring only if the plate is less than 1/2" thick

b) Cutting, addition, removal an/or replacement of the annular plate ring, the shell-to-bottom weld, or a sizeable portion of the shell

c) Cutting, addition, removal an/or replacement of the annular plate ring, the shell-to-bottom weld, or a 100 square inch portion of the shell

d) Cutting, addition, removal an/or replacement of the annular plate ring, the shell-to-bottom weld, or a sizeable portion of the shell in shell material greater than 3/4" thick


27.Of the following, which would not be considered a major repair or alteration?

a) The installation of a shell penetration NPS 12 above the design liquid level

b) The installation of a shell penetration NPS 12 below the design liquid level

c) Jacking of a tank shell

d) The complete of partial removal and replacement of more than 12 inches of vertical weld joining shell plates, or radial weld joining the annular plate ring


Section 2 API-653 Practice Questions

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Transcript of Section 2 API-653 Practice Questions