HVAC Journeyman Prep Test

60 Questions  I  By Ferstade
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  • 1. 
    1.How many amps can a 40va, 120volt transformer with a 24volt secondary carry?
    • A. 

      2.0

    • B. 

      1.7

    • C. 

      3.0

    • D. 

      0.3


  • 2. 
    2.Welding cylinders shall be moved by ________?
    • A. 

      Dolly or hand truck

    • B. 

      A minimum of two people

    • C. 

      Rolling across the floor

    • D. 

      Tilting and rolling them on their bottom edges


  • 3. 
    3.______________ motors driving exhaust fans shall not be placed inside booths and ducts.
    • A. 

      Large horsepower

    • B. 

      Fractional horsepower

    • C. 

      Electric

    • D. 

      Permanent split capacitor


  • 4. 
    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. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4


  • 5. 
    5.All gas piping installed on top of roofs shall be elevated not less than _______ inches off the roof surface.
    • A. 

      3.5

    • B. 

      4.5

    • C. 

      6

    • D. 

      2


  • 6. 
    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. 

      6'6"

    • B. 

      7'3"

    • C. 

      8'0"

    • D. 

      10'0"


  • 7. 
    7.The length of pipe to be cut of 3/4" pipe that has a 90 and a 45 at each end is _______.
    • A. 

      17 5/8"

    • B. 

      17 1/4"

    • C. 

      18"

    • D. 

      18 5/8"


  • 8. 
    8.A level service space in front of an appliance mounted in an attic shall not be less than __________.
    • A. 

      30" wide x 30" deep

    • B. 

      30" wide x 36" deep

    • C. 

      36" wide x 30" deep

    • D. 

      42" wide x 30" deep


  • 9. 
    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. 

      10

    • B. 

      25

    • C. 

      35

    • D. 

      40


  • 10. 
    10.Electrical wiring, contols and connections to equipment and appliances regulated by this code shall be in accordance with __________.
    • A. 

      AH116-02

    • B. 

      NFPA 704-07

    • C. 

      NFPA 70

    • D. 

      UL 731-95


  • 11. 
    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. 

      2cfm per 1000 btu/h

    • B. 

      5cfm per 2000 btu/h

    • C. 

      8cfm per 5000 btu/h

    • D. 

      4cfm per 1000 btu/h


  • 12. 
    12. A minimum openable area to the outdoors shall be  ______ percent of the floor area being naturally ventilated.
    • A. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4


  • 13. 
    13. If you install a 20 mfd capacitor and a 40 mfd capacitor in parallel, you recieve a total capacitance of ___________.
    • A. 

      10 mfd

    • B. 

      30 mfd

    • C. 

      60 mfd

    • D. 

      13.3 mfd


  • 14. 
    14. If you add refrigerant to an airconditioner that has an external equalized TXV, the subcooling will _________.
    • A. 

      Go up

    • B. 

      Go down

    • C. 

      Be the same as superheat

    • D. 

      Adding refrigerant to this system does not effect subcooling


  • 15. 
    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. 

      1

    • B. 

      1 1/4

    • C. 

      1 1/2

    • D. 

      2


  • 16. 
    16. What combustion air (one opening method) is needed for appliances totaling 350,000 btu?
    • A. 

      7"

    • B. 

      10"

    • C. 

      14"

    • D. 

      16"


  • 17. 
    17. A circuit having a supply voltage of 240 volts and a resistance reading of 100 ohms will have an amperage reading of _________.
    • A. 

      .41

    • B. 

      2.4

    • C. 

      4.8

    • D. 

      Can not tell by information given above


  • 18. 
    18. The minimum fire protection rating for a fire damper installed in less than 3 hour fire resistance rated assemblies is ________ hours.
    • A. 

      0.5

    • B. 

      1.0

    • C. 

      1.5

    • D. 

      3.0


  • 19. 
    19. The equivalent length of a 8" diameter mitered 90 degree elbow is _________.
    • A. 

      5'

    • B. 

      1'7"

    • C. 

      1'

    • D. 

      2'6"


  • 20. 
    20. A run winding in a compressor has _______ resistance than the start winding.
    • A. 

      The same

    • B. 

      More

    • C. 

      Less

    • D. 

      Can not tell by the information given above


  • 21. 
    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. 

      1/4"

    • B. 

      1/2"

    • C. 

      3/8"

    • D. 

      1"


  • 22. 
    22. Passageways around boilers shall have an unobstructed width of not less than _______ inches.
    • A. 

      10

    • B. 

      16

    • C. 

      18

    • D. 

      24


  • 23. 
    23. Exhaust airflow rate for a barber shop shall be __________ cfm/square foot.
    • A. 

      2.0

    • B. 

      .25

    • C. 

      4.0

    • D. 

      .5


  • 24. 
    24. The maximum vent connector length of a 8" diameter connector is _______ feet.
    • A. 

      2

    • B. 

      4

    • C. 

      8

    • D. 

      12


  • 25. 
    25. A thermocouple strength is measured in _____________.
    • A. 

      Microamps

    • B. 

      Millivolts

    • C. 

      Microvolts

    • D. 

      Milliamps


  • 26. 
    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. 

      2

    • B. 

      8

    • C. 

      4

    • D. 

      5


  • 27. 
    27. What effect would hooking up a 240 volt transformer to a 208 volt supply voltage have on the secondary voltage?
    • A. 

      Secondary voltage will be less

    • B. 

      Secondary voltage will be more

    • C. 

      Primary voltage has no effect on secondary voltage

    • D. 

      Secondary voltage is always rated on the transformer


  • 28. 
    28. The use of gypsum boards to form plenums shall be limited to systems where the temperatures do not exceed __________ degrees.
    • A. 

      100

    • B. 

      175

    • C. 

      125

    • D. 

      225


  • 29. 
    29. A liquid is considered flammable if it has a flash point below ________ degrees and has a vapor pressure not exceeding 50 psia.
    • A. 

      75

    • B. 

      212

    • C. 

      125

    • D. 

      100


  • 30. 
    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. 

      500

    • B. 

      750

    • C. 

      1000

    • D. 

      2500


  • 31. 
    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. 

      5

    • B. 

      10

    • C. 

      8

    • D. 

      6


  • 32. 
    32. The internal diameter of 2 inch type L copper is __________.
    • A. 

      1.985

    • B. 

      1.959

    • C. 

      1.90

    • D. 

      2.2


  • 33. 
    33. The condensate line for a 20 ton package unit will be a minimum of ______ diameter.
    • A. 

      1/2

    • B. 

      3/4

    • C. 

      1

    • D. 

      1 1/4


  • 34. 
    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. 

      10

    • B. 

      16

    • C. 

      20

    • D. 

      26


  • 35. 
    35. Smoke detectors shall be installed in return air systems with a design capacity greater than ________ cfm.
    • A. 

      1200

    • B. 

      1600

    • C. 

      2000

    • D. 

      2400


  • 36. 
    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. 

      1

    • B. 

      2

    • C. 

      3

    • D. 

      4


  • 37. 
    37. Underground gas piping systems must be buried at a minimum depth of _______ inches below ground.
    • A. 

      8

    • B. 

      10

    • C. 

      12

    • D. 

      24


  • 38. 
    38. Liquid adhesive coatings used on filters shall have a flash point not lower than _______ degrees.
    • A. 

      125

    • B. 

      225

    • C. 

      275

    • D. 

      325


  • 39. 
    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. 

      5

    • B. 

      10

    • C. 

      15

    • D. 

      There is no distance requirement


  • 40. 
    40.Support bracing for 1 1/4" copper tubing shall be at interavals no less than _______ feet.
    • A. 

      3

    • B. 

      4

    • C. 

      6

    • D. 

      10


  • 41. 
    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. 

      75

    • B. 

      200

    • C. 

      50

    • D. 

      100


  • 42. 
    42. Tare weight ( when talking about recovery tanks) means?
    • A. 

      The weight of the refrigerant to be added

    • B. 

      The weight of the refrigerant already in the tank

    • C. 

      The weight of the tank

    • D. 

      The weight to be allowed for accidental seepage.


  • 43. 
    43. An application for a permit for any proposed work shall be deemed to have been abandoned ______ days after the date of filing.
    • A. 

      180

    • B. 

      45

    • C. 

      30

    • D. 

      90


  • 44. 
    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. 

      .60

    • B. 

      .70

    • C. 

      .90

    • D. 

      1.0


  • 45. 
    45. The minimum size cast iron pipe that can be utilized for gas piping is _________.
    • A. 

      1/2 inch

    • B. 

      3/4 inch

    • C. 

      1 inch

    • D. 

      Cast iron can not be used for gas piping


  • 46. 
    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. 

      20

    • B. 

      18

    • C. 

      12

    • D. 

      30


  • 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. 

      1.5

    • B. 

      2.5

    • C. 

      3

    • D. 

      5


  • 48. 
    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. 

      6

    • B. 

      7

    • C. 

      8

    • D. 

      9


  • 49. 
    49. If a heat pump needs to have an accumulator installed in it, it should be installed in the ____________.
    • A. 

      Suction line outside of the unit

    • B. 

      Discharge line

    • C. 

      Liquid line

    • D. 

      Suction line between the reversing valve and the compressor


  • 50. 
    50. NFPA 58-08 has to do with __________.
    • A. 

      Parking structures

    • B. 

      Liquid petroleum gas

    • C. 

      National electric code

    • D. 

      Chimneys, fireplaces, vents and solid burning appliances


  • 51. 
    51. Water is considered a refrigerant. What is its name?
    • A. 

      R-1270

    • B. 

      R-401

    • C. 

      R-718

    • D. 

      R-170


  • 52. 
    52. Underground ducts shall have a minimum slope of _____ inch per foot to allow drainage to a point provided with access.
    • A. 

      1/8

    • B. 

      1/16

    • C. 

      1/4

    • D. 

      1


  • 53. 
    53. Which of the following should not be used as a test medium for testing gas piping?
    • A. 

      Nitrogen

    • B. 

      Air

    • C. 

      Carbon dioxide

    • D. 

      Oxygen


  • 54. 
    54. Ducts shall be supported with approved hangers at intervals not exceeding _______ feet.
    • A. 

      5

    • B. 

      10

    • C. 

      8

    • D. 

      25


  • 55. 
    55. A vent material listed and labeled for use with wall furnaces is type _____ vent.
    • A. 

      B

    • B. 

      BW

    • C. 

      L

    • D. 

      X


  • 56. 
    56. The lowest portion of a floor furnace shall not have less than a ________ inch clearance from grade.
    • A. 

      10

    • B. 

      14

    • C. 

      Needs to have access to crawl under

    • D. 

      6


  • 57. 
    57. Round metal ducts used for single swelling units of a size of 16 inches shall be of ______ guage.
    • A. 

      28

    • B. 

      26

    • C. 

      24

    • D. 

      22


  • 58. 
    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. 

      25

    • B. 

      100

    • C. 

      50

    • D. 

      200


  • 59. 
    59. Unvented room heaters shall not have an input rating in excess of ________ btu/hr.
    • A. 

      20,000

    • B. 

      100,000

    • C. 

      80,000

    • D. 

      40,000


  • 60. 
    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. 

      1200

    • B. 

      1900

    • C. 

      2800

    • D. 

      5400


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