HAC-101 Chap 59 HVAC System Servicing (Auto) Test B

The 609 license ensures that the technician knows how to repair the automotive air-conditioning systems.

• True

• False

Which of these heating/cooling systems was the first to be free of apparent harm to passengers?

• Passing air over coils of compressed ammonia

• Transferring heat to the cabin from the exhaust system

• Bringing a small gas lamp into the cabin for heat

• Using chlorofluorocarbons (CFC)-based refrigerant

In 1939, Packard introduced the first automotive air-conditioning system as an add-on luxury unit.

• True

• False

______ made it possible for air-conditioning systems to be used by consumers with no apparent harm, unlike the ammonia systems.

• MTLs

• DTCs

• CFCs

• EPAs

The sun's heat travels by:

• convection

• radiation

• convection

• vaporization

The amount of heat given up by steam to turn back into a liquid is the same 970 BTU and is called:

• latent heat of evaporation.

• latent heat of condensation.

• latent heat of freezing.

• None of the answers listed

Tech A says that heat is removed from the passenger compartment by the heater core. Tech B says that heat in the cab is removed through by the refrigerant and is released to the outside air at the condenser. Who is correct?

• Tech A

• Tech B

• Both A and B

• Neither A nor B

The refrigerant in the A/C system must have a boiling point ______ freezing to manipulate its boiling and condensing points by changing pressure.

• Well above

• Well below

• Right at

• None of the answers listed

When the air-conditioning compressor clutch is _______, the pulley attached via a belt to the crankshaft can spin freely.

• Engaged

• Disengaged

• Connected

• Energized

Hoses are not as strong as pipes and tend to be porous.

• True

• False