Climate Control Final Review

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

• Technician A only
• Technician B only
• Both Technician A and Technician B
• Neither Technician A nor Technician B

Where in the air conditioning system is the refrigerant a low pressure gas?

• Evaporator outlet
• Evaporator inlet
• Condenser outlet
• Condenser inlet

Where in the air conditioning system is the refrigerant a high pressure liquid?

• Condenser inlet
• Evaporator outlet
• Evaporator inlet
• Condenser outlet

The compressor operates continuously with which type of system controls?

• Orifice tube
• POA system
• EPR system
• Both POA system and EPR system

A thermal expansion valve has a ________ orifice, whereas an orifice tube uses a ________ orifice to control refrigerant flow.

• drain; fill
• digital; analog
• open; closed
• variable; fixed

Water is observed dripping out from beneath the evaporator. Technician A says that is normal. Technician B says that the evaporator housing is defective and should be replaced. Which technician is correct?

• Technician A only
• Technician B only
• Both Technician A and Technician B
• Neither Technician A nor Technician B

The material used to absorb moisture inside the air-conditioning system is called ________.

• ester
• desiccant
• drier
• PAG

What is the function of the desiccant bag inside an accumulator?

• It captures excess R 134a.
• It captures and stores moisture.
• It stores and releases ice.
• All of these

Which of the following is NOT a function of the expansion valve?

• Prevent the evaporator from freezing
• Provide the restriction that separates the low side from the high side
• Allow liquid refrigerant to return to the compressor
• Meter refrigerant into the evaporator for maximum cooling

Which of the following can result from evaporator freeze-up?

• Air is not drawn over the fins
• The air-conditioning system produces little or no cooling.
• The refrigerant may not properly evaporate.
• All of these.