API 653 Sample Questions

_______________________

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Name:

Job Title:

Company:

Exam Type : PRE-TEST

Course Title : API 653: TANK INSPECTION CODE:

Inspection, Repair, Alteration & Reconstruction of Steel Aboveground Storage Tanks Used in the Petrochemical Industry (API Exam Preparation Training)

MARK

Open Book

1. The liquid penetrant examination method is an effective means for detecting _______.

a. internal discontinuities of a weldb. surface discontinuities of a weldc. both internal and surface discontinuities of a weldd. subsurface discontinuities of a weld

2. A WPS is a written qualified welding procedure prepared to ________.

a. provide direction for making production welds to Code requirementsb. provide direction for the welder to make temporary weldsc. provide direction for the inspector for inspection of the weldsd. provide direction for the welder to use as a general guideline

3. Welding in the 3G position qualifies a welder in what positions?

a. Flat and horizontalb. Horizontal and verticalc. Flat and verticald. Vertical and overhead

4. Which of the following is an essential variable for the WPS?

a. A change in groove designb. A change in backingc. A change in post weld heat treatmentd. A change in electrode angle

5. A welder may be qualified by RT if ___________.

a. the welder uses SMAWb. the welder uses GMAW Short Circuiting modec. the welder uses GMAW Short Circuiting mode root pass with SMAW fill

and reinforcementd. the welder obtains approval from the inspector

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6. A peripheral seal, on an internal floating roof, shall be designed to accommodate ______ of local deviation between the floating roof and the shell.

a. the manufacturer’s standardb. ±4 inchesc. ±1/8inchd. inspector’s experience

7. What is the maximum allowable prod spacing using an AC prod technique?

a. t/2b. 8 inchesc. 10 inchesd. No spacing required

8. Welders that weld tank shell vertical joints shall be qualified in accordance with______.

a. API 11O4b. ASME Section Vc. ASME Section IXd. AWS D1.1

9. Geometric unsharpness of the radiograph of a component under 2” thick shall not exceed __________.

a. 0.020b. 0.030c. 0.040d. 0.050

10.For measuring the thickness of materials using the contact pulse-echo method, temperatures are not to exceed________.

a. 200°Fb. 93°Cc. both 1 and 2d. 50°F

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11.Each piece of magnetizing equipment shall be calibrated ___________.

a. at the beginning of each shiftb. at least once a year or whenever the equipment has been subject to

major electrical repairc. whenever the technician feels like itd. at least once every 90 days

12.During calibration of an ammeter the unit shall not deviate by more than ____ of full scale.

a. 10%b. 20%c. 30%d. 40%

13.An inspector is evaluating a radiograph, a bright white image of a “B” appears on a darker background of the radiograph, __________.

a. the radiograph shall be considered unacceptableb. the radiograph should not be rejectedc. the “B” is for identification of the welderd. the “B” is for identification of the weld

14.Ultrasonic examination of hot tap connections or reinforcement is required by API 653 when _______.

a. in lieu of radiographic testingb. searching for weld flawsc. searching for laminationsd. requested by the welder

15.During an internal inspection of a tank, pitting that measures 0.30 inches deep was found in the shell (0.625 Thickness). The required thickness of the shell in this area is 0.5 inches. Based on the above information should a repair be made?

a. Yesb. Noc. The inspector optiond. Repair contractor’s option

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The following applies to questions 16 through 25 below:

An inspection is performed on an AST 24’ tall, 22’ fill height, 94’ diameter, water storage service, earth foundation. There is one area of general internal corrosion on the south side of the shell 20” wide and 20” in vertical length. There is evidence of bottom settlement.

16.Calculate the minimum thickness of the first course based on product alone.

a. 1.175”b. 0.228”c. 0.551”d. 0.217”

17.Calculate the minimum thickness for the third course, if each course is 4’ in height.

a. .122”b. .100”c. .275”d. .132”

18.Calculate the “L” length for an area of general corrosion found 10’ from the bottom on the south side of the shell, T2= .125”.

a. 40”b. 12.68”c. 680”d. 11.75”

19.There are three pits aligned vertically on the north side of the tank, in the first course. The diameter of the pits are 1 .250”, 1 “, and .500” in length along a vertical line 8” long.Note: Assume pit depth of slightly less than one-half of the minimum acceptable tank shell thickness, exclusive of the corrosion allowance.

a. Because the pits are aligned vertically no repair is requiredb. Scattered pits may be ignoredc. If the pit is round, it may be ignoredd. A repair is required

20.Three circumferentially scattered pits are located on the west side of the tank 18” from the bottom. The pits measure .500”, .477” and .732” in diameter. Note: Assume pit depth of one-half of the minimum acceptable tank shell thickness, exclusive of the corrosion allowance.

a. Because the pits are scattered circumferentially no repair is required

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b. All pits may be ignoredc. If the pit is round, it may be ignoredd. A repair is required

21.A bulge is found on the tank floor, the diameter of the bulge is 30”. What is the maximum permissible height for the bulge?

a. 11.1”b. .460”c. .962”d. 1.11”

22.An area of edge settlement in the tank bottom 6’ from the shell has sloped down and settled. The settlement measures 2” at the deepest point. (The bottom lap welds are approximately parallel to the shell).

a. A more rigorous stress analysis must be performedb. The area should be repairedc. Sloped edge settlement is usually no problemd. The area should be documented and checked during the next

inspection

23.What is the hydrostatic test height of this tank based on a minimum thickness found in question 16, as the controlling thickness?

a. 24’b. 34.2’c. 18.6’d. Not enough information given

24.A depression is noted on a section of the bottom near the middle of the east quadrant. The depression measures 5/8” deep, with a diameter of 36 inches. Should a repair be recommended?

a. Yesb. Noc. Not enough information givend. The tank holds water, no problem

25.If the maximum liquid level in the tank were to be lowered by 5’, what is the minimum thickness of the first course?

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a. 1.73”b. .166”c. .200”d. No change from original design thickness

The following applies to questions 26 through 27 below:

Or = 10 yearsRTbC = .200RTip = .190StPr = .002UPr = .010

26.Using data from above, calculate MRT. (metal loss from the bottom side corrosion).

a. .250b. .070c. .002d. .080

27.Using data from above, calculate MRT. (metal loss from internal corrosion).

a. .250b. .070c. .002d. .080

28.The weld ripples of reinforcement of butt-welded joints shall be before _________ radiography.

a. removedb. ground flush, with grinding direction parallel to the weldc. ground flush, with grinding direction perpendicular to the weldd. removed if irregularities mask discontinuities

29.What is the hydrostatic test height of an in-service welded AST built to API 650, 8th Edition, 82’ diameter, 40’ tall with a minimum first course thickness of 0.197”. The material of construction is A-516, Grade 70 (A 516M Grade 485).

a. 40’b. 36’-2”c. 32’-8”d. 31’-6”

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30.For a single-wall material thickness, over 0.375” through 0.50”, what is the hole-type designation for a source side penetrameter?

a. 15b. 17c. 20d. 25

31.The temperature range to conduct a standard technique liquid penetrant examination is ______.

a. 500F to 1350Fb. 500F to 1250Fc. 700F to 1150Fd. 500F to 800F

32.During an MT examination, __________ shall be performed on each area.

a. 100% coverage at the required sensitivityb. a calibration of each piece of magnetizing equipmentc. at least three separate examinationsd. prod spacing of at least 10”

33.An AC yoke shall have a lifting power of at least ____________.

a. 5lbs.b. 8 lbs.c. 10 lbs.d. 40 lbs.

34.A DC yoke shall have a lifting power of at least _________.

a. 5lbs.b. 8 lbs.c. 10 lbs.d. 40 lbs.

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35.A new tank will hold a product with the specific gravity of 1.05; The corrosion allowance is .10; The thickness of the first course is 1 .25 inches; Hydrostatic test stress 25,000 PSI. What is the thickness required for the annular plate? (Note: Include corrosion allowance).

a. 5/16”b. 11/16”c. 3/8”d. 7/16”

36.A leak is noted 1 1/2” away from the shell-to-bottom weld in the floor of an existing welded tank. The hole in the floor is 4” in diameter. What type of repair, in compliance with API 653, 3rd Edition, should be made?

a. Use RBI. Because the product might not contaminate the soil or waterways, no repair is required.

b. Weld build-up the area.c. Install a ‘tombstone’ shaped, welded-on patch plate, intersecting the

shell-to-bottom joint at approximately 90°.d. Install a non-welded patch plate and fiberglass/epoxy to coat the area.

37.When using the SMAW process, a welder has changed from an F number 4 electrode to an F number 3 electrode. Does the procedure need to be requalified?

a. Yesb. Noc. Only if low hydrogen electrodes are usedd. API 650 allows this change

38.During a welder qualification test, for plate coupons, all surfaces (except areas designated “discard”) shall _______.

a. show complete joint penetration with complete fusion of weld metal and base metal

b. show no more than 1/3t inadequate penetrationc. show no more than 1/3t nonfusiond. be allowed one 5/32” crater crack

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39.What is the hydrostatic test thickness for a new tank whose diameter is 150’, and has a fill height of 40’? The shell material is A 36M.

a. 0.655b. 0.611c. 0.563d. 0.500

40.In order to comply with API 650, the finished surface of a weld reinforcement on plate 1/2” thick, horizontal butt joints, may have a reasonably uniform crown not to exceed ____________ for radiographic examination.

a. 1/4”b. 3/16”c. 1/8”d. 1/16”

41.If piping near the tank enters the ground, the soil should be excavated ______ inches for inspection.

a. 1—3b. 3—6c. 6—12d. Piping is not addressed by any of the documents listed in the API 653

Body of Knowledge.

42.Floating roofs on new tanks shall be sufficiently buoyant to remain floating after ______.

a. Fifteen inches of rainfall in a 24-hour periodb. Ten inches of rainfall in a 24-hour periodc. Thirty inches of snow in a 24-hour periodd. Thirty inches of sand in a 24-hour period

43.A sudden rapid fracture under stress, where the material exhibits little or no evidence of ductility or plastic deformation, is called _________?

a. brittle fractureb. cavitationc. atmospheric corrosiond. caustic corrosion

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44.Each floor scanning operator, who only use the bottom scanning equipment, shall receive a minimum of ________ hours of training.

a. 8b. 12c. 20d. 40

45.Variables in the procedure that can be changed without having to re-qualify the procedure and/or the scanning operators are ________.

a. essential variablesb. non-essential variablesc. qualification testsd. TBEQ

Questions 46 through 50 apply to the WPS)PQR Procedure which begins on page 12.

46.What is the root face limitation as listed on the attached WPS and PQR?

a. 3/32”b. 1/8”c. No limitd. Not designated

47.If the supporting PQR is used, are the P-no’s correct on the attached WPS?

a. Yesb. Noc. Could be if properly preheatedd. Not enough information

48.Is the thickness range on the WPS supported by the PQR?

a. Yesb. Noc. Requalification is required by API 570d. Requalification is required by ASME V

49.Is the attached PQR properly qualified?

a. No, because RT is not allowed during PQR qualificationb. No, because there are not enough tensile testsc. No, because peening is allowed by B31.3

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d. Yes

50.What should have been the correct number and type of guided bends on the PQR?

a. 6 side bendsb. 2 face and 2 root bendsc. 1 side, 1 face and 1 root bendd. 2 face, 2 root and 4 side bends

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Please close all materials. The remainder of the exam

is “Closed Book.”

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The second part of the exam is “Closed Book,”

51.Who has the ultimate responsibility for complying with the provisions of API Standard 653?

a. APIb. Owner/operatorc. Inspectord. Contractor/builder

52.If cracks are suspected in nozzles or nozzle welds they should be checked by ______.

a. ultrasonic digital thickness gaugeb. MT or PT examinationc. eddy current testingd. infra-red thermography

53.Localized corrosion due to the concentration of caustic or alkaline salts is ______?

a. erosionb. brittle fracturec. caustic corrosiond. phase failure

54.Per API 653, tanks shall have a formal visual inspection once every _____ years or RCA/4N years, whichever is less.

a. threeb. four

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c. fived. seven

55.Monthly visual inspections of the external condition of in-service tanks may be performed by ___________.

a. API 653 inspectorsb. owner/operator personnelc. NDE techniciansd. plant managers

56.The critical zone for repairs to tank bottoms is that portion of the bottom or annular plate within _______ inches of the inside edge of the shell.

a. 3b. 6c. 12d. 24

57.On a fixed-type roof, planks long enough to span at least _____ roof rafters should be laid and used as walkways.

a. none allowedb. 1c. 2d. 3

58.Cathodic protection surveys are recommended to ensure the effectiveness of cathodic protection. How often should this survey be done?

a. Every 10 yearsb. Every time the tank is emptyc. Annuallyd. Semi-annually

59.The deflection of an arc from its normal path because of magnetic forces is _____.

a. arc blow

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b. arc lengthc. arc striked. arc angle

60.During the reconstruction of a tank shell, welding operators, welders and welding procedures must be qualified in accordance with _______.

a. API 650b. ASME Section Vc. ASME Section IXd. API 11O4

61.Upon completion, the roof of a tank designed to be gas tight shall be tested by which one of the following methods?

a. Magnetic particle testing of all weldsb. Application of internal air pressure not exceeding the weight of the

roof plates and applying a solution suitable for the detection of leaksc. Penetrant testing the weld jointsd. Visual inspection of the weld joints

62.In regard to API 653, roof plates corroded to an average thickness of _______ inch in any 100 square inch area shall be repaired or replaced.

a. less than 0.09b. 0.09c. greater than 0.09d. no API 653 requirement, owner’s requirement

63.A fusion weld made without filler metal is _______.

a. brazingb. SMAW weldc. autogenous weldd. SAW weld

64.Each welder making welds on a tank shall be certified by _________.

a. erection/fabrication manufacturerb. purchaserc. Nuclear Regulatory Commissiond. certified inspector

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65.A discontinuity with a length that is substantially greater than its width is called a ______.

a. round discontinuityb. linear discontinuityc. non-linear discontinuityd. rejectable defect

66.A form of corrosion that occurs from moisture associated with atmospheric conditions is called ______

a. brittle fractureb. caustic corrosionc. stress crackingd. atmospheric corrosion

67.Which of the following tanks are used to reduce filling and breathing loss by eliminating vapor space?

a. Cone roof tankb. Umbrella-roof tankc. Vapor-dome roof tankd. Floating roof tank

68.Per API 650, external floating roof deck plates having support leg or other rigid penetrations closer than inches to lap weld seams must be full fillet welded not less than 2 inches on 10 inch centers.

a. 6b. 12c. 14d. 18

69.Foundation pads that have washed out or settled under the bottoms of atmospheric storage tanks can be repaired by _________.

a. pumping in waterb. pumping in argonc. pumping in sand, dirt or thin concreted. pumping in gas

70.When corrosion rates are not known and similar service experience is not available, the actual bottom thickness shall be determined by inspections within the next _____ year(s) of tank operation to establish corrosion rates.

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a. fiveb. tenc. threed. one

71.The mechanical working of metals using impact blows is referred to as ______.

a. inclusionb. corrosionc. fatigued. peening

72.Calcining can occur when concrete has been exposed to ______.

a. chemical attackb. sulfate - type alkalisc. chloridesd. high temperature

73.A contributing factor for determining internal inspection intervals shall be time, not to exceed _____ years for any reason, if an RBI program is not in place.

a. 10b. 5c. 20d. 15

74.Upon completion of welding of the new tank bottom, the welds shall be inspected by which one of the following methods?

a. Radiographsb. Vacuumc. Penetrant testingd. Hammer testing

75.The junction of the weld face and the base metal is the __________.

a. heat affect zoneb. weld toec. stress riserd. dilution zone

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76.Tank plates being welded which do not have proper identification shall be subjected to _______.

a. chemical analysisb. UT thickness measurementsc. PT testingd. RTtesting

77.An assembly whose component parts are joined by welding is a _________.

a. spool pieceb. weldmentc. fillet weldd. groove weld

78.______ identifies a procedure for installing a nozzle in the shell of a tank that is in service.

a. Repairb. Alterationc. Hot tapd. Reconstruction

79.Annular bottom plates shall have a radial width that provides at least ________ inches between the inside of the shell and any lap-welded joint in the remainder of the bottom.

a. 10b. 30c. 24d. 18

80.For known materials, all shell plates and bottom plates welded to the shell shall meet, as a minimum, the chemistry and mechanical properties of material specified for the application with regard to thickness and design metal temperature, per ________.

a. ASM Requirementsb. ASME Requirementsc. API 650 Requirementsd. ASTMA 7 Requirements

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81.What action should be taken after a flat spot is discovered in the second ring of a 200’ diameter AST?

a. The shell distortion shall be evaluatedb. The area shall be cut out and replacedc. Since no product is leaking out of the area, it may be ignoredd. The inspector has the option to repair or ignore

82.Routine in-service visual inspections of the external condition of the tank shall not exceed _______.

a. one monthb. six monthsc. one yeard. five years

83.A separation at the joint root between the work pieces is referred to as a ________.

a. gapb. root facec. root edged. root opening

84.Minimum thickness for tank bottom plate, when there is no means of leak detection and containment, is ________ inch.

a. .10b. .075c. .15d. .05

85.When used, the ultrasonic thickness measurements shall be made at intervals not to exceed ________.

a. one monthb. one yearc. five years, (unknown corrosion rate)d. ten years, (unknown corrosion rate)

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86.Cavity-type discontinuities formed by gas entrapment during solidification of the weld are ________.

a. cracksb. tungsten inclusionc. slagd. porosity

87.The most likely point of occurrence of cracks in riveted tanks is around _________.

a. internal pipingb. flanged connectionsc. roof sealsd. rivet holes

88.Qualified inspectors shall have education and experience equal to at least one of the following:

a. a degree in engineering plus 1 year of experience in inspection of tanks, pressure vessels or piping

b. two years of experience in work related fieldc. two year certificate in technology from technical colleged. high school education

89.The maximum acceptable undercutting of the base metal for vertical butt joints is _______ inch.

a. 3/32b. 1/8c. 1/64d. 3/64

90.When used, ultrasonic thickness measurements shall be made at ____ year intervals after commissioning new tanks.

a. 5b. 7c. 10

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d. 15

91.On a reconstructed tank, all new shell joints shall be __________.

a. full fillet welded with complete fusionb. butt-welded with complete penetration and complete fusionc. lap-welded with complete penetration and complete fusiond. single grove with backing strip

92.A non-metallic product resulting from the mutual dissolution of flux and non-metallic impurities in some welding processes is __________.

a. porosityb. tungsten inclusionc. slagd. cracking

93.A double-welded butt weld is ___________.

a. a joint between two abutting parts lying in approximately the same plane

b. a joint between two abutting parts lying in approximately the same plane that is welded from both sides

c. a joint between two overlapping members in which the overlapping edges of both members are welded with fillet welds

d. a fillet weld whose size is equal to the thickness of the thinner joined member

94.All requirements of API 650, _____ shall be considered before changing the service of a tank to operation at temperatures above 200°F.

a. Appendix Mb. Appendix Jc. Appendix Cd. Appendix K

95.Openings in tank shells larger than required to accommodate a _______ inch flanged or threaded nozzle shall be reinforced.

a. one

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b. twoc. threed. four

96.The API 653 standard employs the principles of _________.

a. API 650b. ASME Article 4c. AWS D1.1d. API 11O4

97.Qualification test plates for floor scan, with flaws, should be a minimum of ___________ sq. ft.

a. 20b. 70c. 90d. 150

98.A fracture-type discontinuity characterized by a sharp tip and high ratio of length to width to opening displacement is referred to as _______.

a. crackb. slagc. porosityd. spatter

99.The acceptability of welds examined by radiography shall be judged by the standards in ______.

a. ASME Section V, Division 7b. ASME Section IX, Paragraph QW191c. ASME Section VIII, Division 1, Paragraph UW-51 (b)d. API11O4

100. Per API 653, what is the maximum allowable banding, using a vertical 36” sweep board?

a. 1 1”b. 2 1/2”c. 3 3/8”d. 3/32”

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101. The arrangement of direct current arc welding leads in which the electrode is the negative pole and the work piece is the positive pole of the welding arc is _____?

a. DCENb. DCEPc. ACd. AC/DC

102. Any work on a tank that changes its physical dimensions or configuration is considered a/an ____________.

a. reconstructionb. rebuildingc. reworkingd. alteration

103. When bottom annular plates are required by paragraph 3.5.1 of API 650, the radial joints shall be radiographed. For single welded joints using a backup bar, one spot radiograph shall be taken on _____ percent of the radial joints.

a. 10b. 30c. 50d. 100

104. What is the maximum allowable misalignment on a 3/4” vertical butt joint?

a. 10%b. 1/16”c. 10% or maximum of 1/8”d. 12% or maximum of 3/32”

105. Atmospheric storage tanks are those tanks that have been designed to operate in their gas and vapor spaces at internal pressures which approximate pressure.

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a. 16 lbs. to 25 lbs.b. 12 lbs. to 15lbs.c. more than 25 lbs.d. atmospheric

106. The arrangement of direct current welding leads in which the electrode is the positive pole and the work piece is the negative pole of the welding arc is _________?

a. DCENb. DCEPc. ACd. AC/DC

107. The portion of the groove face within the joint root is called __________.

a. landb. root facec. stringer beadd. root pass

108. Welder identification on roof welds and flange-to-nozzle neck welds shall ________.

a. be hand or machine stampedb. be stamped every 3 feetc. be stamped on the top side of each nozzle an in every 3 feet of roof

weldd. not require identification

109. Annular bottom plates must extend a minimum of _______ inches outside the tank shell.

a. 1 1/2b. 2c. 3d. 4

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110. For penetrations using insert plates, how shall the completed butt welds between the insert plate and shell plate be inspected?

a. 100% RTb. Spot RTc. MTd. Visual

111. NDE examiners that meet the requirements of ASME Section V, Article 1, are qualified with ASNI/ASNT CP-189 or _________.

a. AWS QC-1b. APIc. ASNT SNT-TC1Ad. ABS

112. The maximum operating temperature for tanks constructed to API 650 (not including appendices) is ______.

a. 500°Fb. 500°Cc. 200°Fd. 200°C

113. New _______ for floating roof support legs and for fixed roof support columns shall be installed when replacing a tank floor.

a. mud ringsb. leg guidesc. bearing platesd. support leg pins

114. Where does the new nameplate need to be attached to a reconstructed tank?

a. Adjacent to the existing nameplateb. Does not need onec. On the roofd. Over the suction piping

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115. The corrosion rate for an AST is 5 mils per year. Based on API 653 requirements when should the next external UT inspection be scheduled? Note: Remaining Corrosion Allowance is .17 inches.

a. 17yearsb. 15 yearsc. 20 yearsd. 10 years

116. The design thickness of a reconstructed tank is based on _________.

a. original shell thicknessb. measurements taken within 180 days prior to relocationc. measurements taken when the tank was removed from serviced. new product loads

117. The maximum design liquid level for product shall be determined by calculating the maximum design liquid level for each shell course based on _________.

a. amount of product neededb. the specific gravity of the productc. material coatingd. number of penetrations in the first shell course

118. SW is the acronym for what type of welding?

a. Submerged Weldingb. Shielded Metal Arc Weldingc. Slick Weldingd. Stud Welding

119. You are adding a 6 inch blending nozzle to the bottom course, the shell is 5/8” thick. What size insert plate is required when used with a reinforcement plate?

a. 12” diameterb. 18” diameterc. Three times the diameter of the penetrationd. The diameter of the reinforcement plate, plus 12”

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120. Who is responsible for compliance with the API 650 standards?

a. Manufacturerb. Purchaserc. State Inspectord. API 653 Inspector

121. ____________ settlement occurs when the tank shell settles sharply around the periphery, resulting in deformation of the bottom plate.

a. Uniformb. Edgec. Out-of-Planed. Rigid Body Tilting

122. A full hydrostatic test can be waived on a tank _________.

a. after replacement of door sheet that intersects the shell-to-bottom weld

b. when a 36-inch nozzle has been installedc. after partial or complete jacking of a tank shelld. if the owner or operator has authorized the exemption in writing

123. Which type of tank settlement will rotate the tank in a tilted plane?

a. Uniform settlementb. Rigid bodyc. Out-of-Plane settlementd. Differential settlement

124. Due to the fast-freezing nature of this process, there is potential for lack of sidewall fusion when welding thick-wall equipment or a nozzle attachment.

a. GMAW - Pulsedb. GMAW - Sprayc. GMAW - Gd. GMAW - S

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125. The minimum thickness of new roof plates shall be _____ inch, plus any corrosion allowances, as specified in the repair specifications.

a. 1/2b. 7/8c. 3/16d. 3/8

126. Express 50 mils as ______ inch(es).

a. .500b. .050c. .005d. .0005

127. For replacement of tank bottom floor, what is a suitable non-corrosive material for use between the old and new floor?

a. Dirtb. Sand or concretec. Fiberglass insulationd. Air

128. According to API 653, the basis for repairs and alterations shall be an ________.

a. API Standard 650 equivalenceb. API Standard 2207 equivalencec. ASME Section V equivalenced. AWS D 1 .1 equivalence

129. All new shell joints shall be _______ joints, with complete penetration.

a. butt weldedb. lap weldedc. rivetedd. chemically bonded

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130. During the repair of an AST, one new vertical shell weld was installed. How many radiographs are required on the vert? (The shell is 1 .25” thick).

a. One radiograph shall be taken in every vertical jointb. 100% of the vertical jointc. Two radiographs shall be taken in the vertical jointd. No radiographs required

131. Settlement can result from _______.

a. frequent freezing and thawing of the groundb. nearby equipment operating with extreme vibrationc. too much product being stored in the tankd. high wind

132. Storage tanks shall be ____ and gas-freed prior to commencement of dismantling.

a. filledb. drainedc. cleanedd. vented

133. All bottom plates shall have a minimum nominal thickness of _________ inch, exclusive of any corrosion allowance specified by the purchaser for the bottom plates.

a. 3/8b. .250c. .516d. .325

134. ____________ means the work necessary to reassemble a tank that has been dismantled and relocated to a new site.

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a. Reconstructionb. Rebuildingc. Reworkingd. Alteration

135. Repairs shall not be attempted on a tank that is filled with _____ or on a tank that has contained until the tank has been emptied, cleaned and gas freed in a safe manner.

a. nitrogenb. oilc. waterd. grain

136. According to API 653, a full hydrostatic test, held for 24 hours, shall be performed on:

a. a new tankb. an in-service tankc. a reconstructed tankd. an out-of-service tank

137. Misalignment in completed vertical joints over 5/8” shall not exceed what percentage of the plate thickness?

a. 25% with a maximum of 1/16”b. 2% with a maximum of 3/64”c. 5% with a maximum of 3/8”d. 10% with a maximum of 1/8”

138. New or altered reinforcing plates of shell penetrations shall be given a(n) __________ test, in accordance with API Standard 650.

a. dieselb. airc. stressd. gas

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139. Ultrasonic acceptance standards, in accordance with API 653, shall be __________.

a. ASME Section VIIIb. ASME Section Vc. ASME Section Xld. Agreed upon by the purchaser and the manufacturer

140. Column-based clip-guides shall be welded to the tank bottom to prevent ________.

a. internal erosionb. structural upliftingc. lateral movement of column basesd. lateral expansion and contraction

141. Any specific design considerations, other than normal product loading, shall be specified by _______.

a. owner/operatorb. contractorc. engineerd. welding foreman

142. A(n) ________ is an electrode of an electrochemical cell at which oxidation (corrosion) occurs.

a. bathodeb. anodec. cathoded. electrolyte

143. A(n) ________ is an electrode of an electrochemical cell at which a reduction reaction occurs.

a. bathodeb. anodec. cathoded. electrolyte

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144. A __________ is a discontinuity in a coating film that exposes the metal surface to the environment.

a. vacationb. surface interruptionc. stress riserd. holiday

145. ____________ occurs when two metals with different compositions (thus different electrolytic potentials) are connected in an electrolyte (usually soil).

a. Scattered metal growthb. Scattered metal blisteringc. Galvanic corrosiond. Erosion

146. A Galvanic system is a _________.

a. system that uses a metal less active than the structure to stop corrosion

b. system that uses a metal more active than the structure to stop corrosion

c. system that uses a chemical to stop corrosiond. system that uses a coating to stop corrosion

147. All tanks shall be given a formal visual external inspection by an inspector qualified in accordance with API 653, Paragraph 4.10 at least every _____ years.

a. 10b. 7c. 6d. 5

148. Welding consumables shall conform to the classification that is applicable to the intended use.

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a. ASNTb. AWSc. ASMEd. API

149. The rules given in API 653 are _________ for tank inspection, repairs, alterations and reconstruction.

a. minimum requirementsb. maximum requirementsc. guideline requirementsd. suggested requirements

150. ____________ means any work on a tank involving cutting, burning, welding or heating operations that changes the physical dimensions and/or configuration of a tank.

a. Repairb. Reconstructionc. Reworkingd. Alteration

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API 653 Sample Questions

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