Aux 2 Unit 9 Quiz 7

Aux 2 Unit 9 Q7

1 / 8

How does an oil separator return separated oil to the compressor?

B) By gravitational force only

D) By manually draining the oil periodically

A) By using a pump attached to the separator

C) By using a float valve that opens when sufficient oil accumulates

2 / 8

What is another benefit of using an oil separator in a refrigeration system?

B) To enhance the system's energy efficiency by maintaining proper oil levels in the compressor

C) To change the chemical composition of the refrigerant

A) To increase the system's refrigerant charge

D) To reduce refrigerant flow through the condenser

3 / 8

What is the main function of an oil separator in a refrigeration system?

D) To cool the refrigerant before it enters the expansion valve

A) To filter out impurities from the refrigerant

B) To separate oil from the refrigerant and return it to the compressor

C) To increase the refrigerant pressure

4 / 8

Which property of refrigeration oil helps prevent the formation of sludge and deposits?

D) Low thermal conductivity

C) High moisture content

B) High chemical stability

A) High wax content

5 / 8

Which of the following is a key property of refrigeration oil?

D) High wax content

A) High viscosity at all temperatures

B) Low pour point

C) High water content tolerance

6 / 8

What property of refrigeration oil is important for compatibility with refrigerants?

C) High miscibility with refrigerants

D) High water absorption rate

B) Low miscibility with refrigerants

A) High viscosity index

7 / 8

Where is an oil separator typically installed in a refrigeration system?

A) Between the evaporator and the expansion valve

D) On the suction line of the compressor

C) On the discharge line of the compressor

B) Between the condenser and the receiver

8 / 8

Why is an oil separator used in vapor compression refrigeration systems?

D) To eliminate the need for lubrication in the compressor

A) To increase the system's cooling capacity

B) To prevent oil from entering the evaporator and affecting heat transfer

C) To reduce the size of the expansion valve

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