Exam 25: Special Refrigeration System Components

To protect a refrigeration compressor when refrigerant loss occurs, a(n) ____________________ control is used.

Which of the following is a type of low-ambient temperature head pressure control ?

The spring-loaded type of relief valve is normally brass with a(n) ____________________ seat.

A suction line accumulator is used to ensure that liquid refrigerant enters the compressor.

How does the receiver ensure that only 100% liquid refrigerant enters the liquid line?

Oil separators work on the principle of low refrigerant and oil velocity.

What is the temperature range in medium-temperature refrigeration?

Defrost using internal heat is accomplished using ____.

The EPR valve is installed in the suction line at the evaporator outlet and it ____.

Random defrost is accomplished ____.

The normal position for a suction service valve during normal operation is ____.

Which of the following is another type of low-ambient temperature head pressure control ?

Two-temperature operation of a refrigeration system is necessary when ____.

What prevents the oil pressure safety control from de-energizing a compressor immediately after start-up?

Discuss the king valve .

Where is the refrigerant filter drier found?

The crankcase pressure regulator (CPR) puts a limit on the pressure that can return to the compressor.

When a system pumps down, where is the refrigerant stored?

List four causes of liquid floodback.

Refrigeration systems are designed to operate year round. For this reason they are equipped with ____.