Hvac Journeyman Prep Test

60 Questions  I  By Ferstade on August 17, 2010

  
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1.  51. Water is considered a refrigerant. What is its name?
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D.
2.  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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3.  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.
4 comments
4.  19. The equivalent length of a 8" diameter mitered 90 degree elbow is _________.
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D.
5.  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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6.  25. A thermocouple strength is measured in _____________.
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7.  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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8.  70. What is the minimum openable area required for natural ventilation?
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9.  24. The maximum vent connector length of a 8" diameter connector is _______ feet.
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10.  12. A minimum openable area to the outdoors shall be  ______ percent of the floor area being naturally ventilated.
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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.
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12.  57. Round metal ducts used for single swelling units of a size of 16 inches shall be of ______ guage.
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13.  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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14.  8.A level service space in front of an appliance mounted in an attic shall not be less than __________.
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15.  40.Support bracing for 1 1/4" copper tubing shall be at interavals no less than _______ feet.
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1 comment
16.  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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17.  78. Openings in screens, louvers and grills for exhaust openings shall be _________________________.
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18.  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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19.  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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20.  54. Ducts shall be supported with approved hangers at intervals not exceeding _______ feet.
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21.  72. The minimum clearance from appliances mounted below grade shall be at least?
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22.  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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23.  67. What part of the code allows the inspector to make rules concerning the reuse of equipment?
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24.  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.
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25.  20. A run winding in a compressor has _______ resistance than the start winding.
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26.  59. Unvented room heaters shall not have an input rating in excess of ________ btu/hr.
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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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28.  81. The maximum horizontal support spacing for pex piping shall be a minimum of ________ inches?
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2 comments
29.  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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1 comment
30.  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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31.  14. If you add refrigerant to an airconditioner that has an external equalized TXV, the subcooling will _________.
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32.  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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33.  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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34.  42. Tare weight ( when talking about recovery tanks) means?
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D.
35.  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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36.  35. Smoke detectors shall be installed in return air systems with a design capacity greater than ________ cfm.
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37.  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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38.  33. The condensate line for a 20 ton package unit will be a minimum of ______ diameter.
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3 comments
39.  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.
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40.  37. Underground gas piping systems must be buried at a minimum depth of _______ inches below ground.
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41.  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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42.  32. The internal diameter of 2 inch type L copper is __________.
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1 comment
43.  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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44.  66. What is the required outdoor air ventalation rate for the bathrooms in motels?
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45.  5.All gas piping installed on top of roofs shall be elevated not less than _______ inches off the roof surface.
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46.  45. The minimum size cast iron pipe that can be utilized for gas piping is _________.
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47.  71. How thick of a pad shall a condensor be mounted on when installed on grade surfaces?
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48.  61. Quantities of flammable and combustible liquid in excess of ______ gallons shall be stored in an acceptable or approved cabinet. 
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49.  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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50.  64. A mechanical draft venting system shall terminate at least ____ feet above any forced air inlet located within 10 feet.
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51.  10.Electrical wiring, contols and connections to equipment and appliances regulated by this code shall be in accordance with __________.
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52.  2.Welding cylinders shall be moved by ________?
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53.  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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54.  55. A vent material listed and labeled for use with wall furnaces is type _____ vent.
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55.  16. What combustion air (one opening method) is needed for appliances totaling 350,000 btu?
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56.  22. Passageways around boilers shall have an unobstructed width of not less than _______ inches.
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57.  68. Which of the following areas can fuel fired appliances not draw combustion air from?
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58.  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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59.  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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60.  50. NFPA 58-08 has to do with __________.
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