Refrigeration Systems Quiz

What is the primary function of a refrigeration compressor?

• Absorb heat from the evaporator

• Lower refrigerant pressure

• Circulate refrigerant through the system

• Remove moisture from the refrigerant

Which of the following is NOT a common refrigerant used in commercial refrigeration systems?

• R-22

• R-134a

• R-410A

• R-744

A system with a low refrigerant charge will likely show:

• Low suction pressure and high head pressure

• Low suction pressure and low head pressure

• High suction pressure and low head pressure

• High suction pressure and high head pressure

What type of motor is commonly used in refrigeration compressors?

• Shaded-pole motor

• Capacitor-start motor

• Three-phase induction motor

• Universal motor

What is the recommended personal protective equipment (PPE) when handling refrigerants?

• Safety goggles, gloves, and respirator

• Hard hat and steel-toe boots

• Ear plugs and safety vest

• Fire-resistant clothing

What is the main difference between a heat pump and a traditional air conditioning system?

• Heat pumps only operate in winter

• Heat pumps can provide both heating and cooling

• Air conditioners are more efficient than heat pumps

• Air conditioners use different refrigerants

What does a compressor do in a refrigeration system?

• Decreases the refrigerant's pressure

• Circulates refrigerant without changing its temperature

• Circulates refrigerant, increasing its pressure and temperature

• Removes moisture from the refrigerant

Which refrigerant is not commonly used in traditional commercial systems?

• R-134a

• R-22

• R-410A

• R-744 (CO2)

What results from a low charge in a refrigeration system?

• High suction and head pressures

• Low suction and head pressures

• Increased cooling efficiency

• Faster refrigerant flow

What type of motors do most refrigeration compressors use?

• Single-phase induction motors

• Three-phase induction motors

• Direct current motors

• Stepper motors