HVAC Mobile

Front

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

Back

True

Front

Who is correct regarding the responsibilities of technicians servicing mobile vehicle A/C systems and the current fine for not complying with the EPA 609?

Back

Both Technician A and Technician B.

Front

With the use of ________, maintaining vaporization and condensing points at normal ambient temperatures is simply done by raising or reducing the pressure of the refrigerant.

Back

Refrigerants

Front

Technician A says that manipulating the laws of radiation and convection is what allows an air conditioner to function. Technician B says that refrigerant changes state as it circulates in the A/C system. Who is correct?

Back

Technician B

Front

The automotive air-conditioning cycle starts with the ______.

Back

Compressor

Front

Fixed orifice tube automotive air-conditioning systems use a(n) ______ to ensure that a pure gas is delivered to the compressor.

Back

Accumulator

Front

The heater core is made from tubes that have thin metal ______ connected to them, which increase the surface area tremendously.

Back

Fins

Front

Who is correct regarding the engine thermostat and heater core: Tech A says that the engine thermostat controls the heater system. Tech B says that the heater core can have engine coolant or refrigerant flowing through it depending on whether heat or cool is commanded?

Back

Neither A nor B

Front

Who is correct regarding the operation of dry, heated air and air-conditioning during defrost? Tech A says that dry, heated air is directed to the defroster vents after it passes over both the evaporator and the heater core. Tech B says that having the air-conditioning operated during defrost also keeps refrigerant and oil circulating through the AC components and hoses during the winter months.

Back

Both Techs A and B

Front

Refrigerant changes from vapor to a liquid in which component? Options: Liquid line, Evaporator, Suction line, Condenser

Back

Condenser