HVAC Journeyman Prep Test

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1.  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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2.  50. NFPA 58-08 has to do with __________.
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D.
3.  32. The internal diameter of 2 inch type L copper is __________.
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D.
Discuss this Question
4.  79. The bottom of an air inlet or exhaust opening in fuel-dispensing areas shall be located not more than _________ inches above the floor
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B.
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D.
5.  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.
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D.
6.  64. A mechanical draft venting system shall terminate at least ____ feet above any forced air inlet located within 10 feet.
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B.
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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.
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B.
C.
D.
8.  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.
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D.
9.  53. Which of the following should not be used as a test medium for testing gas piping?
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D.
10.  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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D.
11.  3.______________ motors driving exhaust fans shall not be placed inside booths and ducts.
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D.
12.  71. How thick of a pad shall a condensor be mounted on when installed on grade surfaces?
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D.
13.  23. Exhaust airflow rate for a barber shop shall be __________ cfm/square foot.
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14.  10.Electrical wiring, contols and connections to equipment and appliances regulated by this code shall be in accordance with __________.
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D.
15.  40.Support bracing for 1 1/4" copper tubing shall be at interavals no less than _______ feet.
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D.
16.  49. If a heat pump needs to have an accumulator installed in it, it should be installed in the ____________.
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17.  24. The maximum vent connector length of a 8" diameter connector is _______ feet.
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D.
18.  67. What part of the code allows the inspector to make rules concerning the reuse of equipment?
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19.  37. Underground gas piping systems must be buried at a minimum depth of _______ inches below ground.
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20.  19. The equivalent length of a 8" diameter mitered 90 degree elbow is _________.
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B.
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D.
Discuss this Question
21.  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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22.  55. A vent material listed and labeled for use with wall furnaces is type _____ vent.
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D.
23.  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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D.
24.  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.
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D.
25.  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.
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D.
26.  65. What is the minimum height above the flor an appliance must be installed in a private garage?
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27.  45. The minimum size cast iron pipe that can be utilized for gas piping is _________.
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D.
28.  80. Outlets for exhaust that exceeds ______ degrees shall be designed as a chimney.
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29.  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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30.  59. Unvented room heaters shall not have an input rating in excess of ________ btu/hr.
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D.
31.  38. Liquid adhesive coatings used on filters shall have a flash point not lower than _______ degrees.
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B.
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D.
32.  72. The minimum clearance from appliances mounted below grade shall be at least?
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D.
33.  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.
C.
D.
34.  66. What is the required outdoor air ventalation rate for the bathrooms in motels?
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B.
C.
D.
35.  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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D.
36.  51. Water is considered a refrigerant. What is its name?
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D.
37.  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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D.
38.  12. A minimum openable area to the outdoors shall be  ______ percent of the floor area being naturally ventilated.
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D.
39.  54. Ducts shall be supported with approved hangers at intervals not exceeding _______ feet.
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C.
D.
40.  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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D.
41.  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.
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D.
42.  42. Tare weight ( when talking about recovery tanks) means?
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B.
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D.
43.  73. Whats the normal voltage of a control circuit for residential service?
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44.  16. What combustion air (one opening method) is needed for appliances totaling 350,000 btu?
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D.
45.  33. The condensate line for a 20 ton package unit will be a minimum of ______ diameter.
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D.
46.  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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D.
47.  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.
C.
D.
48.  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.
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D.
49.  81. The maximum horizontal support spacing for pex piping shall be a minimum of ________ inches?
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D.
50.  14. If you add refrigerant to an airconditioner that has an external equalized TXV, the subcooling will _________.
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D.
51.  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.
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B.
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D.
52.  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.
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D.
53.  35. Smoke detectors shall be installed in return air systems with a design capacity greater than ________ cfm.
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D.
54.  57. Round metal ducts used for single swelling units of a size of 16 inches shall be of ______ guage.
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D.
55.  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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C.
D.
56.  25. A thermocouple strength is measured in _____________.
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D.
57.  74. What is the function of a heat anticipator wire in the thermostat?
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D.
58.  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.
59.  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.
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D.
60.  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.
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B.
C.
D.
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