HVAC Journeyman Prep Test

60 Questions

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HVAC Quizzes & Trivia

Heating, ventilation, and air conditioning (HVAC) is a combination technology of indoor and vehicular environmental comfort. Are you training to be able to properly install and maintain such systems in any environment? The quiz below is perfect for helping you test out what you know so far. Give it a shot and see what you should read up more on before the finals.


Questions and Answers
  • 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. 
    • 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. 
    • 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. 
    • 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. 
    • 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. 
    • 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. 
    • 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. 
    • A. 

      1.985

    • B. 

      1.959

    • C. 

      1.90

    • D. 

      2.2

  • 33. 
    • 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. 
    • 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. 
    • 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. 
    • 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