CFC Commercial Refrigeration Systems 2

Question 1

In a commercial walk-in cooler, which component is responsible for removing heat from the refrigerated space?

Accepted Answer

Evaporator coil

Answer

The evaporator coil absorbs heat from the refrigerated space, causing refrigerant to evaporate and cool the air inside.

Question 2

What is the purpose of a liquid-line filter drier in a commercial refrigeration system?

Accepted Answer

Remove moisture and contaminants from refrigerant

Answer

A liquid-line filter drier removes moisture, acid, and solid contaminants that could damage system components or cause ice blockages.

Question 3

A commercial refrigeration system shows high discharge pressure but normal suction pressure. The most likely cause is:

Accepted Answer

Dirty or fouled condenser

Answer

A dirty or fouled condenser restricts heat rejection, causing discharge pressure to rise while suction pressure remains normal.

Question 4

Which EPA Section 608 refrigerant handling practice is required when opening a commercial refrigeration system for repair?

Accepted Answer

Recover refrigerant to required levels before opening

Answer

EPA Section 608 requires technicians to recover refrigerants to specified levels before opening any system containing CFCs, HCFCs, or HFCs.

Question 5

What does superheat at the evaporator outlet indicate in a properly operating commercial refrigeration system?

Accepted Answer

Refrigerant vapor is warmer than its saturation temperature

Answer

Superheat at the evaporator outlet means the refrigerant vapor temperature exceeds its saturation temperature, ensuring only dry vapor enters the compressor.

(CFC) Chlorofluorocarbon Certification Practice Test

(CFC) Chlorofluorocarbon Certification Practice Test

CFC Commercial Refrigeration Systems 2