HVAC Journeyman Prep Test

60 Questions  I  By Ferstade
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HVAC Quizzes & Trivia

  
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1.  1.How many amps can a 40va, 120volt transformer with a 24volt secondary carry?
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B.
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D.
2.  2.Welding cylinders shall be moved by ________?
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B.
C.
D.
3.  3.______________ motors driving exhaust fans shall not be placed inside booths and ducts.
A.
B.
C.
D.
4.  4. A 14 inch gas vent protruding through a roof and located within 8 feet of a vertical wall must terminate not less than ________ feet above highest point it passes through the roof.
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B.
C.
D.
5.  5.All gas piping installed on top of roofs shall be elevated not less than _______ inches off the roof surface.
A.
B.
C.
D.
6.  6.Refrigerant piping that crosses an open space that affords passageway in any building shall not be less than _________ above the floor unless the piping is located against the ceiling of such space.
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B.
C.
D.
7.  7.The length of pipe to be cut of 3/4" pipe that has a 90 and a 45 at each end is _______.
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B.
C.
D.
8.  8.A level service space in front of an appliance mounted in an attic shall not be less than __________.
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B.
C.
D.
9.  9.In exterior walls and bearing partitions, any wood stud is permitted to be cut or notched not to exceed ________ percent of its depth.
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B.
C.
D.
10.  10.Electrical wiring, contols and connections to equipment and appliances regulated by this code shall be in accordance with __________.
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B.
C.
D.
11.  11. Where unvented infrared heaters are installed, natural or mechanical means shall provide outdoor ventilation air at a rate of not less than ________ of the aggregateinput rating of all such heaters installed in the space.
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B.
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D.
12.  12. A minimum openable area to the outdoors shall be  ______ percent of the floor area being naturally ventilated.
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B.
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D.
13.  13. If you install a 20 mfd capacitor and a 40 mfd capacitor in parallel, you recieve a total capacitance of ___________.
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B.
C.
D.
14.  14. If you add refrigerant to an airconditioner that has an external equalized TXV, the subcooling will _________.
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B.
C.
D.
15.  15. A natural gas piping system that has a 250,000 btu furnace attached to it and has a longest run of 93', inlet pressure under 2 psi, pressure drop of .5 in w.c., and specific gravity of .60 should have a schedule 40 mettallic pipe no less than ________ in diameter.
A.
B.
C.
D.
16.  16. What combustion air (one opening method) is needed for appliances totaling 350,000 btu?
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B.
C.
D.
17.  17. A circuit having a supply voltage of 240 volts and a resistance reading of 100 ohms will have an amperage reading of _________.
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B.
C.
D.
18.  18. The minimum fire protection rating for a fire damper installed in less than 3 hour fire resistance rated assemblies is ________ hours.
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B.
C.
D.
19.  19. The equivalent length of a 8" diameter mitered 90 degree elbow is _________.
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B.
C.
D.
20.  20. A run winding in a compressor has _______ resistance than the start winding.
A.
B.
C.
D.
21.  21. All hoses exceeding _________ inside diameter shall have a safety device at the source of supply or branch line to reduce pressure in case of hose failure.
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B.
C.
D.
22.  22. Passageways around boilers shall have an unobstructed width of not less than _______ inches.
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B.
C.
D.
23.  23. Exhaust airflow rate for a barber shop shall be __________ cfm/square foot.
A.
B.
C.
D.
24.  24. The maximum vent connector length of a 8" diameter connector is _______ feet.
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B.
C.
D.
25.  25. A thermocouple strength is measured in _____________.
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B.
C.
D.
26.  26. A vent shall terminate through a 12/12 roof slope by ______ feet as long as it is no closer than 8' from a vertical wall.
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B.
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D.
27.  27. What effect would hooking up a 240 volt transformer to a 208 volt supply voltage have on the secondary voltage?
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B.
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D.
28.  28. The use of gypsum boards to form plenums shall be limited to systems where the temperatures do not exceed __________ degrees.
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B.
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D.
29.  29. A liquid is considered flammable if it has a flash point below ________ degrees and has a vapor pressure not exceeding 50 psia.
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B.
C.
D.
30.  30. Factory built chimneys for medium heat appliances producing flue gases having a temperature above _______ degrees, measured at the entrance to the chimney, shall comply with UL 959.
A.
B.
C.
D.
31.  31. A safety belt lanyard shall be a minimum of 1/2" nylon, or equivalent, with a maximum length to provide for a fall of no greater than _______ feet.
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B.
C.
D.
32.  32. The internal diameter of 2 inch type L copper is __________.
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B.
C.
D.
33.  33. The condensate line for a 20 ton package unit will be a minimum of ______ diameter.
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B.
C.
D.
34.  34. Where equipment requiring access and appliances are installed on roofs or elevated structures at a heigth exceeding _______ feet, such access shall be provided by a permanent approved means of access.
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B.
C.
D.
35.  35. Smoke detectors shall be installed in return air systems with a design capacity greater than ________ cfm.
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B.
C.
D.
36.  36. Equipment and appliances installed at grade level shall be supported on a level concrete slab or other approved material extending not less than _________ inches above adjoining grade.
A.
B.
C.
D.
37.  37. Underground gas piping systems must be buried at a minimum depth of _______ inches below ground.
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B.
C.
D.
38.  38. Liquid adhesive coatings used on filters shall have a flash point not lower than _______ degrees.
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B.
C.
D.
39.  39. Guards are required when appliances, equipment, fans or other components that require service and roof hatch openings are located within _________ feet of the roof edge.
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B.
C.
D.
40.  40.Support bracing for 1 1/4" copper tubing shall be at interavals no less than _______ feet.
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B.
C.
D.
41.  41. I have control circuits that total .8 amps. The control secondary voltage is 120 volts. What is th minimum wattage of the transformer needed for this application?
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B.
C.
D.
42.  42. Tare weight ( when talking about recovery tanks) means?
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B.
C.
D.
43.  43. An application for a permit for any proposed work shall be deemed to have been abandoned ______ days after the date of filing.
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D.
44.  44. Gas piping systems that are to be supplied with a gas of a specific gravity of ______ or less can be sized directly from the tables provided in the international fuel gas code.
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B.
C.
D.
45.  45. The minimum size cast iron pipe that can be utilized for gas piping is _________.
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B.
C.
D.
46.  46. Vented wall furnaces shall be located such that any door swing shall not come closer than _______ inches to any air inlet or air outlet measured at right angles to the opening.
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B.
C.
D.
47.  47. Test pressure used when testing new gas systems shall be no less than _________ times the proposed maximum working pressure but not less than 3 psig irrespective of design pressure.
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C.
D.
48.  48. I have a 1025 rpm motor with a 3.5" motor pulley and i need a blower rpm of 400 rpm. What size blower pulley do i need?
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B.
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D.
49.  49. If a heat pump needs to have an accumulator installed in it, it should be installed in the ____________.
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B.
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D.
50.  50. NFPA 58-08 has to do with __________.
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D.
51.  51. Water is considered a refrigerant. What is its name?
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D.
52.  52. Underground ducts shall have a minimum slope of _____ inch per foot to allow drainage to a point provided with access.
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B.
C.
D.
53.  53. Which of the following should not be used as a test medium for testing gas piping?
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B.
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D.
54.  54. Ducts shall be supported with approved hangers at intervals not exceeding _______ feet.
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B.
C.
D.
55.  55. A vent material listed and labeled for use with wall furnaces is type _____ vent.
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B.
C.
D.
56.  56. The lowest portion of a floor furnace shall not have less than a ________ inch clearance from grade.
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B.
C.
D.
57.  57. Round metal ducts used for single swelling units of a size of 16 inches shall be of ______ guage.
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B.
C.
D.
58.  58. The flash point of a transfer fluid in a hydronic piping system shall be a minimum of _______ degrees above the maximum system operating pressure.
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B.
C.
D.
59.  59. Unvented room heaters shall not have an input rating in excess of ________ btu/hr.
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B.
C.
D.
60.  60. Lifelines shall be secured above the point of operation to an ancorage or structual member capable of supporting a minimum dead weight of ________ pounds.
A.
B.
C.
D.
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