EPA 609 MVAC System Components & Operation 1

Question 1

What is the primary function of the compressor in an MVAC system?

Accepted Answer

To pressurize refrigerant vapor and circulate it through the system

Answer

To cool the refrigerant by removing heat

Answer

To filter moisture from the refrigerant

Answer

To regulate refrigerant flow into the evaporator

Question 2

Where does heat absorption (cooling of the vehicle cabin) occur in an MVAC system?

Accepted Answer

Evaporator

Answer

Condenser

Answer

Compressor

Answer

Receiver-drier

Question 3

What is the function of the condenser in an MVAC system?

Accepted Answer

To release heat from the refrigerant to the outside air

Answer

To evaporate liquid refrigerant inside the cabin

Answer

To filter refrigerant contaminants

Answer

To compress refrigerant vapor

Question 4

What device in an MVAC system controls the flow of refrigerant into the evaporator?

Accepted Answer

Thermal Expansion Valve (TXV) or Orifice Tube

Answer

Compressor clutch

Answer

Receiver-drier

Answer

Suction accumulator

Question 5

The high-pressure side of an MVAC system runs between which components?

Accepted Answer

Compressor outlet to evaporator inlet (through condenser)

Answer

Evaporator outlet to compressor inlet

Answer

Receiver-drier to evaporator

Answer

Compressor to accumulator

Question 6

What is the purpose of the receiver-drier (or accumulator) in an MVAC system?

Accepted Answer

To store liquid refrigerant and remove moisture and contaminants

Answer

To compress refrigerant vapor

Answer

To measure system pressure

Answer

To cool the cabin air directly