2A652 Age Journeyman Volume 4, Edit Code 6 Quiz

88 Questions | Total Attempts: 116

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2A652 Quizzes & Trivia

2A652 vol 4 Ed. 6.


Questions and Answers
  • 1. 
    (601) The heater control unit (HCU) on the New Generation Heater (NGH) starts the main air fan for output air when
    • A. 

      A heat setting is selected.

    • B. 

      A constant flame is established.

    • C. 

      The temperature gauge reads COOL.

    • D. 

      The inside temperature reaches 140 degrees Fahrenheit (°F).

  • 2. 
    (602) When should starting aids be used to start the New Generation Heater (NGH)?
    • A. 

      When the temperature gauge reads COOL.

    • B. 

      Never, as it will result in serious engine damage.

    • C. 

      When ambient temperature is below 32 degrees Fahrenheit (°F).

    • D. 

      During the engine start up with the ignition switch in PREHEAT position.

  • 3. 
    (602) When operating the New Generation Heater (NGH), turn the heat control switch to the desired position after
    • A. 

      Ample warm-up time.

    • B. 

      A minimum of 45 seconds.

    • C. 

      System voltage indicates 120 volts alternating current (VAC).

    • D. 

      The inside chamber temperature reaches 140 degrees Fahrenheit (°F).

  • 4. 
    (603) Repair of ground heater equipment should never be attempted
    • A. 

      Without first talking with the operator.

    • B. 

      Without first consulting your supervisor.

    • C. 

      Unless accurate technical data is available.

    • D. 

      Unless in the presence of an experienced mechanic.

  • 5. 
    (604) Heat that can be felt and added or subtracted to a substance without changing its state is called
    • A. 

      Super heat.

    • B. 

      Latent heat.

    • C. 

      Specific heat.

    • D. 

      Sensible heat.

  • 6. 
    (604) Heat added to a gas is
    • A. 

      Sensible heat.

    • B. 

      Specific heat.

    • C. 

      Super heat.

    • D. 

      Latent heat.

  • 7. 
    (605) A good refrigerant will
    • A. 

      Operate in moderate to high pressure.

    • B. 

      Operate in low to moderate pressure.

    • C. 

      Be semi-corrosive to metals.

    • D. 

      Have a high boiling point.

  • 8. 
    (606) Which MA–3D air conditioner control switch allows the operator to control the overall volume of air leaving the unit?
    • A. 

      Blower.

    • B. 

      Airflow.

    • C. 

      Evaporator.

    • D. 

      Temperature.

  • 9. 
    (606) Refrigerant leaving the evaporator coil, in the MA–3D air conditioner, is a
    • A. 

      Low-pressure gas.

    • B. 

      High-pressure gas.

    • C. 

      Low-pressure liquid.

    • D. 

      High-pressure liquid.

  • 10. 
    (606) When starting the MA–3D air conditioner, hold the safety override switch until
    • A. 

      30 pounds of oil pressure is reached on the engine oil pressure gauge.

    • B. 

      The start switch is released.

    • C. 

      The engine warms up.

    • D. 

      The engine starts.

  • 11. 
    (606) On the MA–3D air conditioner, which component shuts off the compressor when suction pressure drops below 5 pounds of pressure?
    • A. 

      Low pressure cutout.

    • B. 

      Temperature controller.

    • C. 

      Pressure control cutout.

    • D. 

      Compressor pump down overload.

  • 12. 
    (607) Which type of refrigeration system leak occurs when the pressure within the system is less than atmospheric pressure?
    • A. 

      Inward.

    • B. 

      Vacuum.

    • C. 

      Pressure.

    • D. 

      Outward.

  • 13. 
    (607) A refrigerant reclaimer is used to
    • A. 

      Remove refrigerant.

    • B. 

      Remove and store refrigerant.

    • C. 

      Remove refrigerant and separate acids from the refrigerant.

    • D. 

      Remove and store refrigerant and separate oil and acids from the refrigerant.

  • 14. 
    (607) Refrigerant is always removed through the
    • A. 

      Purge valve.

    • B. 

      Receiver inlet valve.

    • C. 

      Receiver outlet valve.

    • D. 

      Discharge service valve.

  • 15. 
    (608) An A/M32C–10D air conditioner air cycle machine consists of
    • A. 

      An air compressor fan only.

    • B. 

      An expansion turbine only.

    • C. 

      A heat exchanger and an expansion turbine.

    • D. 

      An expansion turbine and a compressor fan.

  • 16. 
    (608) Which A/M32C–10D air conditioner component extracts energy from bleed air on the air cycle machine?
    • A. 

      Compressor.

    • B. 

      Heat exchanger.

    • C. 

      Expansion turbine.

    • D. 

      Temperature controller.

  • 17. 
    (609) The ACE 802S air conditioner compressor switch must be held in the HOLD position when engaging the compressor in order to
    • A. 

      Ensure the engine is at governed speed before engaging compressor.

    • B. 

      Allow compressor oil and discharge pressures to stabilize.

    • C. 

      Defrost the evaporator.

    • D. 

      Build-up oil pressure.

  • 18. 
    (609) Which is the compressor displacement when the ACE 802S air conditioner compressor is in the HOLD position?
    • A. 

      Maximum.

    • B. 

      Minimum.

    • C. 

      Constant.

    • D. 

      Erradic.

  • 19. 
    (609) Which medium does the ACE 802S air conditioner heat boost system use to trim output air temperature?
    • A. 

      Air.

    • B. 

      Refrigerant.

    • C. 

      Electric heater.

    • D. 

      Engine coolant.

  • 20. 
    (609) Which action occurs in the ACE 802S air conditioner evaporator?
    • A. 

      Condensing refrigerant absorbs heat from the air stream.

    • B. 

      Boiling refrigerant absorbs heat from the air stream.

    • C. 

      Condensing refrigerant looses heat to the air stream.

    • D. 

      Boiling refrigerant looses heat to the air stream.

  • 21. 
    (610) Which valve must be opened prior to starting the ACE 802S air conditioner engine?
    • A. 

      Air shutoff.

    • B. 

      Fuel shutoff.

    • C. 

      Coolant control.

    • D. 

      Refrigerant flow.

  • 22. 
    (610) Which must be accomplished to avoid damage prior to operating the ACE 802S air conditioner in the HEATING mode after COOLING mode operation?
    • A. 

      Permit refrigerant pressure to equalize.

    • B. 

      Perform maximum refrigerant pump down.

    • C. 

      Place heating/cooling switch in HEATING position.

    • D. 

      Place the reversing valve lever in the HEATING position.

  • 23. 
    (611) In troubleshooting, which is the first step that must be completed when a unit comes in with a write-up?
    • A. 

      Isolate the problem.

    • B. 

      Perform a service inspection.

    • C. 

      Perform an operational check.

    • D. 

      Recognize the write-up as a malfunction.

  • 24. 
    (611) How can a restriction in a refrigerant system be identified?
    • A. 

      Sweating at the outlet of a component.

    • B. 

      Frosting at the outlet of a component.

    • C. 

      Abnormal compressor noise.

    • D. 

      Increased suction pressure. Please

  • 25. 
    (612) On a basic rotary compressor, which prevents air from leaving the discharge port while the intake port is taking air in?
    • A. 

      Sliding barrier.

    • B. 

      Rotating barrier.

    • C. 

      Discharge valve.

    • D. 

      Stationary barrier.