CFESA Refrigeration Systems

Question 1

What is the primary refrigerant used in most modern commercial food equipment refrigeration systems?

Accepted Answer

R-404A

Answer

R-22

Answer

R-134a

Answer

R-410A

Question 2

Which component in a refrigeration system is responsible for removing heat from the refrigerant?

Accepted Answer

Condenser

Answer

Evaporator

Answer

Compressor

Answer

Expansion valve

Question 3

What does superheat indicate in a refrigeration system?

Accepted Answer

Temperature rise of vapor above its saturation point

Answer

Temperature of the condenser coil

Answer

Subcooling at the liquid line

Answer

Discharge temperature at the compressor

Question 4

A technician measures a high head pressure and normal suction pressure in a walk-in cooler. The most likely cause is:

Accepted Answer

Dirty condenser coils

Answer

Low refrigerant charge

Answer

Stuck open TXV

Answer

Faulty evaporator fan

Question 5

What is the purpose of a receiver in a commercial refrigeration system?

Accepted Answer

Store extra refrigerant and ensure liquid feed to the expansion device

Answer

Filter moisture from the refrigerant

Answer

Separate oil from the refrigerant

Answer

Measure refrigerant flow rate

Question 6

When recovering refrigerant from commercial equipment, technicians must comply with which EPA regulation?

Accepted Answer

Section 608 of the Clean Air Act

Answer

Section 404 of the Safe Drinking Water Act

Answer

Title V of the Clean Water Act

Answer

OSHA 29 CFR 1910.119