1 Exam Prep Air Conditioning A, B and Mechanical Practice ... · 39 Hood joints shall be filled...
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1 Exam Prep Air Conditioning "A", "B" and Mechanical Practice Exam 14 1 The 250 feet of wrought iron pipe passes through a room kept at 80 degrees Fahrenheit. The pipe will carry a fluid at a temperature of 300 degrees Fahrenheit. The contractor should expect an expansion of? A 1.852 inches B 4.63 feet C 4.63 inches D 1.852 feet 2 When trying to start split phase hermetic compressors up to 1/3 horsepower the best relay to use is the? A Solid-state starting relay B Potential relay C Electromagnetic relay D Starting relay 3 Given an 8 inch block, the rope diameter size should be? A 3/4 inches B 7/8 inches C 7/8 to 1 inch D 1 inch 4 According to Code, a 4 inch water gage pressure class is classified as? A Low B Medium C High D Extra heavy duty 5 The contractor is lifting 1,800 pounds. The load on the toggle block will be pounds? The angle is 90 degrees. A 1,800 B 2,538 C 2,700 D 2,754 1
Transcript of 1 Exam Prep Air Conditioning A, B and Mechanical Practice ... · 39 Hood joints shall be filled...
1 Exam Prep
Air Conditioning "A", "B" and Mechanical Practice Exam 14
1 The 250 feet of wrought iron pipe passes through a room kept at 80 degrees Fahrenheit. The pipe will carry a fluid at a temperature of 300 degrees Fahrenheit. The contractor should expect an expansion of?
A 1.852 inches B 4.63 feet C 4.63 inches D 1.852 feet
2 When trying to start split phase hermetic compressors up to 1/3 horsepower the best relay to use is the?
A Solid-state starting relay B Potential relay C Electromagnetic relay D Starting relay
3 Given an 8 inch block, the rope diameter size should be?
A 3/4 inches B 7/8 inches C 7/8 to 1 inch D 1 inch
4 According to Code, a 4 inch water gage pressure class is classified as?
A Low B Medium C High D Extra heavy duty
5 The contractor is lifting 1,800 pounds. The load on the toggle block will be pounds? The angle is 90 degrees.
A 1,800 B 2,538 C 2,700 D 2,754
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12 The melting point of aluminum is?
A 1,220 degrees Fahrenheit B 1,167 degrees Fahrenheit C 1,562 degrees Fahrenheit D 1,706 degrees Fahrenheit
13 Belt guards shall conform to the regulations of?
A The building official B DBPR C SMACNA D OSHA
14 An evaporator pressure regulator is used in some systems to prevent the evaporator pressure from?
A Exceeding the preset level on the compressor B Causing the compressor to overheat C Rising above a preset level D Dropping below a predetermined point
15 Air tight construction is good for?
A Temperature control B Infiltration determination C Exfiltration control D Fire control
1 6 When the relief valve is tapped into the condenser, some codes require the installation of a relief valve 0 n the pressure side of the system.
A Low B High C Reverse D Forward
17 The purpose of the flame detector is to determine?
A Temperature rises approaching 140 degrees B Whether or not a satisfactory flame has been established in the firebox of an oil burner unit C Flame activity outside the firebox D Detect cad cell socket assembly functions for soot accumulation
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18 When pumping down a system, use all of the following procedures except?
A Install the gauge manifold on the system B Start the unit C Back-seat the liquid line D Front-seat the king valve
19 A proportional controller produces a control signal.
A Modulated B Vibratory C Differential D Magnified
20 To properly adjust a fan belt, tighten the adjustment screw until the belt can be flexed about?
A 1 inch top and bottom B 1 inch total C 1/2 inch either top or bottom D Flexed easily using moderate pressure with only two fingers
21 The service technician is reading a pressure of 101.494 at 80 degrees Fahrenheit. The technician is using refrigerant?
AR-12 B R-22 C R-502 D HFC-134a
22 Any increase in condensing temperature and pressure will cause a in evaporative condenser capacity when considering the wet bulb temperature of the air supply?
A Increase B Decrease C Reversal D Surcharge
23 A building 10 feet tall with a roof top mount exhaust system should have a velocity pressure of fpm according to Code.
A 500 B 1,000 C 2,500 D 4,000
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24 The operating pressure required for one inch wg. is?
A Up to 1/2 inch wg. B Over 1/2 inch up to 1 inch wg. C Over 1 inch up to 2 inch wg. D Over 1 inch wg.
25 Reinforcement for flat sides of oval duct shall be?
A Aluminum .043 or greater B Galvanized 24 gage or better C Of a size equal to or greater and spaced at intervals specified for flat oval duct D Of the same size and spacing interval as specified for rectangular duct
26 The amount of commercial kitchen make-up air shall be?
A Fresh B Recirculated C Equal to the exhausted air D Plus or minus 5 percent of the required air
27 The appliance is listed for burning gas fuel with a 250 degree Fahrenheit temperature limit control. The minimum required clearance in front of the device to combustibles is inches.
A6 B 12 C18 D 24
28 The contractor must lift 800 pounds of material to the roof top. The contractor should use rope with a breaking strength of pounds. OA 800 B 4,000 C 8,000 D 10,500
29 According to OSHA, the contractor should wait how many hours before digging?
A8 B 12 C 24 D 48
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30 When using systems containing 100 pounds of refrigerant, which of the following is required?
A A flow meter B A capture system C Building official approval D A certificate of test
31 According to the Trane Manual, R-22 at 80 degrees Fahrenheit will exert a pressure of?
A 143.63 PSIA B 138.99 PSIG C 143.63 PSIG D 138.99 PSIA
32 According to OSHA, excavations 20 feet or less in depth which have vertically sided lower portions shall have a shield extending at least how far above the top of the vertical side?
A 2 feet B 18 inches C 3 feet D 12 inches
33 Scaffolding shall be capable of supporting how many times the intended load?
A2 B 3 C4 D 5
34 Final rpm's are 1,750. At a gear ratio of 35:1, the initial gear factor is?
A 50 B 100 C 150 D 200
35 What would be the length of a 2 1/2 inch screwed-in pipe required for travel between two 45 degree elbows so that the offset would be 8 inches?
A 8 and 1/2 inches B 9 1/2 inches C 9 and 5/16 inches D 11 and 5/16 inches
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36 When appliances are located 16 feet or more above grade, ladders shall have a toe spacing of not less than?
A 24 inches B 18 inches C 12 inches D 6 inches
37 Flattened tubing may cause?
A Condensable gases to ignite B Condensation or frost on the inlet side of the flattened area C Frost on either side of the flattened area D Condensation on the outlet side of the kink
38 The control used on heating systems to activate the fan furnace is the?
A Fan relay B Heating relay C The thermal switch D Modulating motor
39 Hood joints shall be filled with?
A Caulk B Mechanical tape C Liquid-tight welding D Suitable seaming material
40 Using R-22 vapor from the evaporator to the compressor at 40 ° F suction and 105 ° F condensing, with 300 feet of developed length, a 2 PSI drop, a 3 5/8 inch pipe should be capable of supporting how many tons?
A 43.2 B 52.5 C 87.5 D 63.0
41 According to Code, air filters should be replaced?
A Once a month B When the resistance to airflow has increased to two times the original resistance C When the air becomes humid D When ventilation flow is restricted
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42 Non-self-supporting ladders shall be used at an angle not less than of the working length.
A 1/4 B 1/3 C 1/2 D 2/5
43 Stainless steel grease duct material shall not be less than gauge.
A16 B18 C 20 D 22
44 When working with refrigerant leaks, do all of the following except?
A Do not enter an enclosed area without ventilating the entire space B Use the buddy system C Use an air pack D Do not use soap and water to wash the skin
45 Flexible duct line installations with an interior width of 6 inches?
A Require pins B Do not require pins C Require at least 95 percent adhesive coverage D May not be wider than 8 inches at 2,500 FPM's
46 A medium-duty wall-mounted canopy 10 feet by 4 feet requires how many CFM's?
A 300 B 1,200 C 3,000 D 3,600
47 The 10 inch impeller delivers 550 gallons per minute. To deliver 680 gallons per minute, the contractor should use a inch impeller.
All B 12.3 C 13.6 D 16.2
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48 Improper shifting of the reversing valve may be influenced by all of the following except?
A A defective check valve B A defective electrical system C An operating solenoid coil D Refrigerant leaks
49 R-22 at 48 degrees Fahrenheit has a gage reading of?
A 95.4 B 80.7 C 78.2 D 78.5
50 A device used to measure gas pressures both above and below atmospheric pressure is a/an?
A Compound gage B Bellows gage C Head pressure gage D Suction pressure gage
51 The maximum sag between flexible duct supports is?
A 1/2 inch B 1 inch C 2 inches D 2 1/2 inches
52 The heat required to change a liquid to a vapor is called the?
A Humidity ratio B Latent heat of vaporization C Enthalpy D Latent heat of fusion
53 R-502 at 46 degrees Fahrenheit has a gage reading of?
A 74.3 B 89.0 C 82.3 D 92.1
54 A cylindrical tank 8 feet in diameter and 14 feet long contains how many gallons?
A 2,631 B 3,384 C 4,512 D 5,264
55 The fuel valve shutoff shall be?
A Within reach B At the entrance to the building C At the rear of the building D At the base of the tank
56 Class C used for transverse joints only is applicable for static pressure construction class up to wg.
A 1 B 2 C3 D 4
57 Liquid fuel vent pipes shall terminate outside of buildings at a point not less than feet measured vertically.
A2 B 5 C10 D 20
58 The maximum screen opening for residential grille opening is?
A 1/4 inch B 1/2 inch C 3/4 inch D 1 inch
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I Centerline Radius
X 48 Inches
Cooking Surface
Floor
59 The minimum distance for point "X" on the Cooking Surface above is?
A 7 feet B 7.5 feet C 8 feet D 10 feet
60 The centerline radius for the centerline radius drawing above is?
A 24 inches B 36 inches C 48 inches D 60 inches
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1118 560 560 560 BTU's BTU's BTU's BTU's
1111.1„ 560 560 560 BTU's BTU's BTU's
Meter
3" Line 550 BTU'S 550 BTU's
Gas Piping System
61 The total BTU output required for the Gas Piping System above is?
A Less than 6,000 B Between 6,000 and 6,500 C Between 6,500 and 7,000 D More than 7,000
QUESTIONS 62, 63, 64, 65, 66, 67, 68 AND 69 ARE FOR MECHANICAL CANDIDATES ONLY
62 Surgical vacuum exhausts shall be located at all of the following except?
A Outdoors B At a level higher from air intakes C At least 10 feet from any window D Where topography would not divert the exhaust into occupied areas
63 Chambers for medical applications and procedures at pressures below atmospheric pressure are facilities.
A Hyperbaric B Hypobaric C Category 1 D Category 3
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64 When cleaning exterior surfaces of tube ends, use?
A Steel wool B Hot soapy water C Clean, non-shedding abrasive pads D Dry nitrogen
65 Category 1 piping systems shall be subject to a standing vacuum test for hours?
Al2 B 24 C 32 D 48
66 A work space room for Category 1 installations shall have a fire resistance rating of how many hours?
A 1 B 2 C3 D4
67 After brazing, all joints shall be cleaned on the outside with?
A Ammonia B Dry nitrogen C Steel wool D Water and a wire brush
68 The approximate gas input for an automatic storage 50 gallon water heater is how many BTUs per hour?
A 35,000 B 50,000 C 65,000 D 72,000
69 The maximum design operating pressure for non-welded piping systems located inside buildings is pounds per square inch gauge.
AS B 10 C15 D 20
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70 A Type L vent shall be at least how many feet higher than any portion of the roof located within 10 feet horizontally of such chimney?
A2 B3 C4 D5
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ANSWER KEY - EXAM 14
1 C Pipefitter's Handbook 5-25
2 A Air Conditioning/Refrigeration Troubleshooting Handbook 36
3 C Contractors Manual 7-55
4 C Florida Building Code, Mechanical, 2010 Table 603
5 B Contractors Manual 7-82
6 C Trade knowledge
7 B Florida Building Code, Mechanical, 2010 Table 403.3
8 A Trane Air Conditioning Manual 238
9 C Trane Ductulator
10 D Trane Reciprocating Refrigeration 55
11 C SMACNA Duct Construction Standards, Metal/Flexible 2.124
12 A Pipefitter's Handbook 5-4
13 D SMACNA Duct Construction Standards, Metal/Flexible A.19
14 D Trane Air Conditioning Manual 177
15 B Trane Air Conditioning Manual 33
16 A Trane Reciprocating Refrigeration 73
17 B Air Conditioning/Refrigeration Troubleshooting Handbook 134
18 C Air Conditioning/Refrigeration Troubleshooting Handbook 267
19 A Trane Reciprocating Refrigeration 50
20 B Air Conditioning/Refrigeration Troubleshooting Handbook 48
21 D Trane Air Conditioning Manual 438
22 A Trane Reciprocating Refrigeration 35
23 A NFPA 96 A. 8.2.1.1
24 B SMACNA Duct Construction Standards, Metal/Flexible 1.18
25 D SMACNA Duct Construction Standards, Metal/Flexible 3.27
26 C Florida Building Code, Mechanical, 2010 508.1
27 C NFPA 96 Table 5.1.2.1
28 B Contractors Manual 7-53
29 C OSHA 29 CFR Part 1926 .651(b)(2)
30 D Florida Building Code, Mechanical, 2010 1108.4
31 C Trane Air Conditioning Manual 413 15
32 B OSHA 29 CFR Part 1926 Figure B-1
33 C OSHA 29 CFR Part 1926 .451(a)
34 A Trade knowledge
35 C Pipefitter's Handbook 4-1/6/39
36 D Florida Building Code, Mechanical, 2010 306.5
37 D Air Conditioning/Refrigeration Troubleshooting Handbook 55
38 B Air Conditioning/Refrigeration Troubleshooting Handbook 94
39 C Florida Building Code, Mechanical, 2010 507.7.1
40 D Trane Reciprocating Refrigeration 4
41 B NFPA 90A B.3.1
42 A OSHA 29 CFR Part 1926 .1053(b)(5
43 B Florida Building Code, Mechanical, 2010 506.3.1.1
44 D Air Conditioning/Refrigeration Troubleshooting Handbook 430
45 B SMACNA Duct Construction Standards, Metal/Flexible 7.13
46 C Florida Building Code, Mechanical, 2010 507.13.3
300 X 10 = 3,000
47 B SMACNA Energy Systems Analysis/ Management 4.10
48 C Air Conditioning/Refrigeration Troubleshooting Handbook 128
49 B Trane Reciprocating Refrigeration 4
50 A Trane Reciprocating Refrigeration 167
51 D SMACNA Duct Construction Standards, Metal/Flexible 3.37
52 B Trane Air Conditioning Manual 4
53 A Trane Reciprocating Refrigeration 5
54 D Pipefitter's Handbook 5-26
55 B Florida Building Code, Mechanical, 2010 1307.1
56 B SMACNA Duct Construction Standards, Metal/Flexible 1.11
57 A Florida Building Code, Mechanical, 2010 1305.7
58 B Florida Building Code, Mechanical, 2010 Table 401.5
59 A The source for this is the Florida Building Code, Building We have checked with several building departments and also with NFPA. They all responded with there is no rule about this. It appears this would be a bogus question that you should have awareness about to handle properly.
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60 B SMACNA Duct Construction Standards, Metal/Flexible 4.3
61 C 1,118 X 2 M+
560 X 6 M+
550 X2 M+
MR yields 6,696
62 B NFPA 99 - Health Care Facilities 5.3.8.3.11
63 B NFPA 99 - Health Care Facilities 3.3.79
64 C NFPA 99 - Health Care Facilities 5.1.10.4.3.5
65 B NFPA 99 - Health Care Facilities 5.1.12.2.7.2
66 B NFPA 99 - Health Care Facilities 5.1.3.3.2(4)
67 D NFPA 99 - Health Care Facilities 5.1.10.4.7.1
68 B Florida Building Code, Fuel Gas, 2010 Table 402.2
69 A Florida Building Code, Fuel Gas, 2010 402.6
70 A Florida Building Code, Mechanical, 2010 802.5
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