Refrigeration Flashcard SLO2

Front

The compressor operates continuously with which type of system controls? Orifice tube, POA system, EPR system, Both B and C

Back

Both POA system and EPR system

Front

Technician A says that heat is measured in degrees. Technician B says that temperature is measured in degrees. Which technician is correct?

Back

Technician B only

Front

Which type of refrigerant hose is used with an R-134a system?

Back

Barrier hose

Front

It is 90°F in the shop and the humidity is high. What pressure will be shown on the high side pressure gauge (AC system on)?

Back

210 to 290 psi

Front

Normal air conditioning system operation should result in what dash vent temperature during an A/C performance test?

Back

35 to 45 degrees F (2 to 7 degrees C)

Front

Technician A says AC system lines and hoses that are cold have lower refrigerant pressure than warmer lines and hoses. Technician B says frost on a system component usually indicates a refrigerant leak in that area. Which technician is correct?

Back

Technician A only

Front

Who is correct regarding the AC performance test: Technician A checks ambient temperature, while Technician B says that if the AC compressor has not been operating, the high side and low side refrigerant pressure should be equal?

Back

Both technicians

Front

An air conditioning performance check requires a ________.

Back

thermometer and a manifold gauge set

Front

Technician A says that oily residue on hoses, components, or fittings indicates an area where refrigerant may be leaking. Technician B says that clogged evaporator fins may cause inefficient air conditioning operation at all blower speeds. Which technician is correct?

Back

Both technicians

Front

What should the pressures of the low-side and high-side A/C system read on a gauge set with the engine off?

Back

The same