Unit A, Objective 7

What function does the condenser serve in a refrigeration cycle?

• It absorbs heat from the environment.

• It releases heat to the environment.

• It compresses the refrigerant.

• It expands the refrigerant.

Which component in a refrigeration system is responsible for regulating the flow of refrigerant?

• Compressor

• Condenser

• Expansion valve

• Evaporator

What is the term used to describe the removal of heat from the refrigerant after it has been compressed?

• Superheating

• Subcooling

• Condensation

• Evaporation

In a basic refrigeration cycle, what state does the refrigerant have when exiting the evaporator?

• High-pressure liquid

• High-pressure vapor

• Low-pressure liquid

• Low-pressure vapor

Which of the following is a characteristic of the refrigerant at the point of entry into the compressor?

• It is in a high-pressure liquid state.

• It is in a low-pressure vapor state.

• It is at ambient temperature.

• It is in a solid state.

What does the term 'superheat' refer to in a refrigeration cycle?

• The cooling of liquid refrigerant below its condensation point.

• The heating of vapor refrigerant above its condensation point.

• The heating of vapor refrigerant above its boiling point.

• The pressurization of refrigerant vapor.

What role does the expansion valve play in the refrigeration cycle?

• It compresses the refrigerant.

• It condenses the vapor into a liquid.

• It controls the flow of refrigerant into the evaporator.

• It evaporates the liquid refrigerant.

What is a primary function of control system components in HVAC systems?

• To provide aesthetic value to the system.

• To regulate environmental conditions for comfort and efficiency.

• To increase the energy consumption.

• To reduce the system's overall cost.

Which factor is most important when selecting a control component for a control system?

• Aesthetics

• Cost

• Code compliance (legality)

• Design characteristics

What is the role of a pneumatic/electric (PE) relay in a control system?

• It uses an electrical signal to operate a pneumatic switch.

• It uses a pneumatic signal to operate an electrical switch.

• It operates independently of other control signals.

• It provides backup power to the control system.