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Hvac Journeyman Prep Test

60 Questions  I  By Ferstade
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1.  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.
2.  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.
3.  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.
4.  45. The minimum size cast iron pipe that can be utilized for gas piping is _________.
A.
B.
C.
D.
5.  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.
6.  71. How thick of a pad shall a condensor be mounted on when installed on grade surfaces?
A.
B.
C.
D.
7.  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.
A.
B.
C.
D.
8.  73. Whats the normal voltage of a control circuit for residential service?
A.
B.
C.
D.
9.  80. Outlets for exhaust that exceeds ______ degrees shall be designed as a chimney.
A.
B.
C.
D.
10.  55. A vent material listed and labeled for use with wall furnaces is type _____ vent.
A.
B.
C.
D.
11.  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.
12.  74. What is the function of a heat anticipator wire in the thermostat?
A.
B.
C.
D.
13.  43. An application for a permit for any proposed work shall be deemed to have been abandoned ______ days after the date of filing.
A.
B.
C.
D.
14.  64. A mechanical draft venting system shall terminate at least ____ feet above any forced air inlet located within 10 feet.
A.
B.
C.
D.
15.  14. If you add refrigerant to an airconditioner that has an external equalized TXV, the subcooling will _________.
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.  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.
18.  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.
19.  19. The equivalent length of a 8" diameter mitered 90 degree elbow is _________.
A.
B.
C.
D.
20.  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.
21.  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.
22.  76. Interior spaces intended for human occupancy shall be provided with active or passive space-heating systems capable of maintaining a minimum of ______ degrees at a point 3 feet above floor on the design heating day.
A.
B.
C.
D.
23.  1.How many amps can a 40va, 120volt transformer with a 24volt secondary carry?
A.
B.
C.
D.
24.  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.
25.  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.
26.  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.
27.  16. What combustion air (one opening method) is needed for appliances totaling 350,000 btu?
A.
B.
C.
D.
28.  2.Welding cylinders shall be moved by ________?
A.
B.
C.
D.
29.  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.
30.  10.Electrical wiring, contols and connections to equipment and appliances regulated by this code shall be in accordance with __________.
A.
B.
C.
D.
31.  68. Which of the following areas can fuel fired appliances not draw combustion air from?
A.
B.
C.
D.
32.  35. Smoke detectors shall be installed in return air systems with a design capacity greater than ________ cfm.
A.
B.
C.
D.
33.  53. Which of the following should not be used as a test medium for testing gas piping?
A.
B.
C.
D.
34.  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.
A.
B.
C.
D.
35.  72. The minimum clearance from appliances mounted below grade shall be at least?
A.
B.
C.
D.
36.  23. Exhaust airflow rate for a barber shop shall be __________ cfm/square foot.
A.
B.
C.
D.
37.  33. The condensate line for a 20 ton package unit will be a minimum of ______ diameter.
A.
B.
C.
D.
38.  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.
39.  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.
40.  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.
41.  22. Passageways around boilers shall have an unobstructed width of not less than _______ inches.
A.
B.
C.
D.
42.  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.
43.  57. Round metal ducts used for single swelling units of a size of 16 inches shall be of ______ guage.
A.
B.
C.
D.
44.  42. Tare weight ( when talking about recovery tanks) means?
A.
B.
C.
D.
45.  40.Support bracing for 1 1/4" copper tubing shall be at interavals no less than _______ feet.
A.
B.
C.
D.
46.  20. A run winding in a compressor has _______ resistance than the start winding.
A.
B.
C.
D.
47.  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.
48.  75. What is the minimum height of a guard when a unit is mounted close to the edge of a roof?
A.
B.
C.
D.
49.  25. A thermocouple strength is measured in _____________.
A.
B.
C.
D.
50.  56. The lowest portion of a floor furnace shall not have less than a ________ inch clearance from grade.
A.
B.
C.
D.
51.  51. Water is considered a refrigerant. What is its name?
A.
B.
C.
D.
52.  67. What part of the code allows the inspector to make rules concerning the reuse of equipment?
A.
B.
C.
D.
53.  49. If a heat pump needs to have an accumulator installed in it, it should be installed in the ____________.
A.
B.
C.
D.
54.  37. Underground gas piping systems must be buried at a minimum depth of _______ inches below ground.
A.
B.
C.
D.
55.  38. Liquid adhesive coatings used on filters shall have a flash point not lower than _______ degrees.
A.
B.
C.
D.
56.  17. A circuit having a supply voltage of 240 volts and a resistance reading of 100 ohms will have an amperage reading of _________.
A.
B.
C.
D.
57.  12. A minimum openable area to the outdoors shall be  ______ percent of the floor area being naturally ventilated.
A.
B.
C.
D.
58.  54. Ducts shall be supported with approved hangers at intervals not exceeding _______ feet.
A.
B.
C.
D.
59.  50. NFPA 58-08 has to do with __________.
A.
B.
C.
D.
60.  77. Where openings below grade provide required natural ventilation, the outside horizontal clear space measured perpendicular to the opening shall be ________ times the depth of the opening.
A.
B.
C.
D.
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