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HVAC Journeyman Prep Test

60 Questions  I  By Ferstade
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1.  19. The equivalent length of a 8" diameter mitered 90 degree elbow is _________.
A.
B.
C.
D.
2.  1.How many amps can a 40va, 120volt transformer with a 24volt secondary carry?
A.
B.
C.
D.
3.  66. What is the required outdoor air ventalation rate for the bathrooms in motels?
A.
B.
C.
D.
4.  73. Whats the normal voltage of a control circuit for residential service?
A.
B.
C.
D.
5.  20. A run winding in a compressor has _______ resistance than the start winding.
A.
B.
C.
D.
6.  56. The lowest portion of a floor furnace shall not have less than a ________ inch clearance from grade.
A.
B.
C.
D.
7.  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.
8.  70. What is the minimum openable area required for natural ventilation?
A.
B.
C.
D.
9.  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.
10.  57. Round metal ducts used for single swelling units of a size of 16 inches shall be of ______ guage.
A.
B.
C.
D.
11.  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.
12.  51. Water is considered a refrigerant. What is its name?
A.
B.
C.
D.
13.  72. The minimum clearance from appliances mounted below grade shall be at least?
A.
B.
C.
D.
14.  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.
15.  54. Ducts shall be supported with approved hangers at intervals not exceeding _______ feet.
A.
B.
C.
D.
16.  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.
17.  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.
A.
B.
C.
D.
18.  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.
19.  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.
20.  49. If a heat pump needs to have an accumulator installed in it, it should be installed in the ____________.
A.
B.
C.
D.
21.  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.
22.  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.
23.  40.Support bracing for 1 1/4" copper tubing shall be at interavals no less than _______ feet.
A.
B.
C.
D.
24.  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.
25.  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.
A.
B.
C.
D.
26.  59. Unvented room heaters shall not have an input rating in excess of ________ btu/hr.
A.
B.
C.
D.
27.  2.Welding cylinders shall be moved by ________?
A.
B.
C.
D.
28.  81. The maximum horizontal support spacing for pex piping shall be a minimum of ________ inches?
A.
B.
C.
D.
29.  5.All gas piping installed on top of roofs shall be elevated not less than _______ inches off the roof surface.
A.
B.
C.
D.
30.  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.
31.  25. A thermocouple strength is measured in _____________.
A.
B.
C.
D.
32.  42. Tare weight ( when talking about recovery tanks) means?
A.
B.
C.
D.
33.  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.
34.  64. A mechanical draft venting system shall terminate at least ____ feet above any forced air inlet located within 10 feet.
A.
B.
C.
D.
35.  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.
36.  12. A minimum openable area to the outdoors shall be  ______ percent of the floor area being naturally ventilated.
A.
B.
C.
D.
37.  14. If you add refrigerant to an airconditioner that has an external equalized TXV, the subcooling will _________.
A.
B.
C.
D.
38.  33. The condensate line for a 20 ton package unit will be a minimum of ______ diameter.
A.
B.
C.
D.
39.  38. Liquid adhesive coatings used on filters shall have a flash point not lower than _______ degrees.
A.
B.
C.
D.
40.  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.
41.  16. What combustion air (one opening method) is needed for appliances totaling 350,000 btu?
A.
B.
C.
D.
42.  67. What part of the code allows the inspector to make rules concerning the reuse of equipment?
A.
B.
C.
D.
43.  45. The minimum size cast iron pipe that can be utilized for gas piping is _________.
A.
B.
C.
D.
44.  50. NFPA 58-08 has to do with __________.
A.
B.
C.
D.
45.  8.A level service space in front of an appliance mounted in an attic shall not be less than __________.
A.
B.
C.
D.
46.  61. Quantities of flammable and combustible liquid in excess of ______ gallons shall be stored in an acceptable or approved cabinet. 
A.
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.
A.
B.
C.
D.
48.  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.
49.  10.Electrical wiring, contols and connections to equipment and appliances regulated by this code shall be in accordance with __________.
A.
B.
C.
D.
50.  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.
51.  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.
52.  68. Which of the following areas can fuel fired appliances not draw combustion air from?
A.
B.
C.
D.
53.  7.The length of pipe to be cut of 3/4" pipe that has a 90 and a 45 at each end is _______.
A.
B.
C.
D.
54.  55. A vent material listed and labeled for use with wall furnaces is type _____ vent.
A.
B.
C.
D.
55.  53. Which of the following should not be used as a test medium for testing gas piping?
A.
B.
C.
D.
56.  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.
57.  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.
58.  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.
59.  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.
60.  78. Openings in screens, louvers and grills for exhaust openings shall be _________________________.
A.
B.
C.
D.
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