HVAC Journeyman Prep Test

60 Questions  I  By Ferstade
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1.  63. Oxygen depletion safety systems shall shut off the gas supply to the main and pilot burners when the oxygen in the surrounding atmosphere is depleted to the percent concentration specified by the manufactuer, but not lower than ______ percent.
A.
B.
C.
D.
2.  14. If you add refrigerant to an airconditioner that has an external equalized TXV, the subcooling will _________.
A.
B.
C.
D.
3.  71. How thick of a pad shall a condensor be mounted on when installed on grade surfaces?
A.
B.
C.
D.
4.  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.
A.
B.
C.
D.
5.  54. Ducts shall be supported with approved hangers at intervals not exceeding _______ feet.
A.
B.
C.
D.
6.  68. Which of the following areas can fuel fired appliances not draw combustion air from?
A.
B.
C.
D.
7.  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.
A.
B.
C.
D.
8.  61. Quantities of flammable and combustible liquid in excess of ______ gallons shall be stored in an acceptable or approved cabinet. 
A.
B.
C.
D.
9.  40.Support bracing for 1 1/4" copper tubing shall be at interavals no less than _______ feet.
A.
B.
C.
D.
10.  64. A mechanical draft venting system shall terminate at least ____ feet above any forced air inlet located within 10 feet.
A.
B.
C.
D.
11.  22. Passageways around boilers shall have an unobstructed width of not less than _______ inches.
A.
B.
C.
D.
12.  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.
13.  5.All gas piping installed on top of roofs shall be elevated not less than _______ inches off the roof surface.
A.
B.
C.
D.
14.  79. The bottom of an air inlet or exhaust opening in fuel-dispensing areas shall be located not more than _________ inches above the floor
A.
B.
C.
D.
15.  78. Openings in screens, louvers and grills for exhaust openings shall be _________________________.
A.
B.
C.
D.
16.  69. An application for a permit must be accompanied by how many sets of construction documents?
A.
B.
C.
D.
17.  16. What combustion air (one opening method) is needed for appliances totaling 350,000 btu?
A.
B.
C.
D.
18.  32. The internal diameter of 2 inch type L copper is __________.
A.
B.
C.
D.
19.  27. What effect would hooking up a 240 volt transformer to a 208 volt supply voltage have on the secondary voltage?
A.
B.
C.
D.
20.  62. Oxygen cylinders in storage shall be seperated from fuel-gas cylinders or combustible materials a minimum of ______ feet or by a noncombustible barrier at least 5 feet high having a fire resistance rating of at least 1/2 hour.
A.
B.
C.
D.
21.  72. The minimum clearance from appliances mounted below grade shall be at least?
A.
B.
C.
D.
22.  50. NFPA 58-08 has to do with __________.
A.
B.
C.
D.
23.  51. Water is considered a refrigerant. What is its name?
A.
B.
C.
D.
24.  55. A vent material listed and labeled for use with wall furnaces is type _____ vent.
A.
B.
C.
D.
25.  1.How many amps can a 40va, 120volt transformer with a 24volt secondary carry?
A.
B.
C.
D.
26.  9.In exterior walls and bearing partitions, any wood stud is permitted to be cut or notched not to exceed ________ percent of its depth.
A.
B.
C.
D.
27.  35. Smoke detectors shall be installed in return air systems with a design capacity greater than ________ cfm.
A.
B.
C.
D.
28.  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?
A.
B.
C.
D.
29.  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.
A.
B.
C.
D.
30.  80. Outlets for exhaust that exceeds ______ degrees shall be designed as a chimney.
A.
B.
C.
D.
31.  29. A liquid is considered flammable if it has a flash point below ________ degrees and has a vapor pressure not exceeding 50 psia.
A.
B.
C.
D.
32.  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.
A.
B.
C.
D.
33.  81. The maximum horizontal support spacing for pex piping shall be a minimum of ________ inches?
A.
B.
C.
D.
34.  23. Exhaust airflow rate for a barber shop shall be __________ cfm/square foot.
A.
B.
C.
D.
35.  74. What is the function of a heat anticipator wire in the thermostat?
A.
B.
C.
D.
36.  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.
37.  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.
A.
B.
C.
D.
38.  18. The minimum fire protection rating for a fire damper installed in less than 3 hour fire resistance rated assemblies is ________ hours.
A.
B.
C.
D.
39.  73. Whats the normal voltage of a control circuit for residential service?
A.
B.
C.
D.
40.  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?
A.
B.
C.
D.
41.  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.
A.
B.
C.
D.
42.  45. The minimum size cast iron pipe that can be utilized for gas piping is _________.
A.
B.
C.
D.
43.  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.
A.
B.
C.
D.
44.  13. If you install a 20 mfd capacitor and a 40 mfd capacitor in parallel, you recieve a total capacitance of ___________.
A.
B.
C.
D.
45.  12. A minimum openable area to the outdoors shall be  ______ percent of the floor area being naturally ventilated.
A.
B.
C.
D.
46.  3.______________ motors driving exhaust fans shall not be placed inside booths and ducts.
A.
B.
C.
D.
47.  56. The lowest portion of a floor furnace shall not have less than a ________ inch clearance from grade.
A.
B.
C.
D.
48.  37. Underground gas piping systems must be buried at a minimum depth of _______ inches below ground.
A.
B.
C.
D.
49.  42. Tare weight ( when talking about recovery tanks) means?
A.
B.
C.
D.
50.  24. The maximum vent connector length of a 8" diameter connector is _______ feet.
A.
B.
C.
D.
51.  28. The use of gypsum boards to form plenums shall be limited to systems where the temperatures do not exceed __________ degrees.
A.
B.
C.
D.
52.  53. Which of the following should not be used as a test medium for testing gas piping?
A.
B.
C.
D.
53.  8.A level service space in front of an appliance mounted in an attic shall not be less than __________.
A.
B.
C.
D.
54.  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.
A.
B.
C.
D.
55.  52. Underground ducts shall have a minimum slope of _____ inch per foot to allow drainage to a point provided with access.
A.
B.
C.
D.
56.  2.Welding cylinders shall be moved by ________?
A.
B.
C.
D.
57.  67. What part of the code allows the inspector to make rules concerning the reuse of equipment?
A.
B.
C.
D.
58.  25. A thermocouple strength is measured in _____________.
A.
B.
C.
D.
59.  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.
60.  49. If a heat pump needs to have an accumulator installed in it, it should be installed in the ____________.
A.
B.
C.
D.
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