ACR-110 CH 4 review

Front

What is the purpose of the compressor according to the technicians? Technician A states that the compressor turns low-pressure vapor into high-pressure liquid. Technician B says that the compressor is responsible for pumping refrigerant through the components of the air-conditioning system.

Back

Technician B is correct.

Front

The compressors used for air-conditioning in the trucking industry are driven directly or indirectly off the: Accessory pulley, Alternator pulley, Crankshaft pulley, Water pump pulley

Back

Crankshaft pulley

Front

The compressor will draw in refrigerant ____________ while the compressor is on its ____________ stroke.

Back

vapor/intake

Front

On a swash-plate style compressor, what prevents the refrigerant that is being compressed from being pushed back into the suction side of the compressor?

Back

The intake reed valve

Front

Which technician is correct regarding the discharge stroke of the compressor: Technician A states that the discharge stroke may also be referred to as the compression stroke. Technician B states that during the compression stroke, the discharge valve in the compressor must seal tightly?

Back

Technician A is correct.

Front

What change happens to a variable displacement compressor to change its performance? Options: Piston stroke, Piston bore, Control valve, Suction pressure

Back

Piston stroke

Front

Which of the following compressors has the fewest moving parts? The two-piston compressor, The swash plate compressor, The rotary compressor, The scroll compressor

Back

The scroll compressor

Front

What is the most common cause of compressor failure?

Back

Loss of refrigerant.

Front

A refrigerant reacts chemically with moisture to:

Back

form hydrochloric acid in the air-conditioning system.

Front

Two technicians are discussing the drier. Technician A states that the drying agent is called the absorber. Technician B states the drying agent is called a desiccant. Which technician is correct?

Back

Technician B is correct.