Thermodynamic Principles

What happens to refrigerant vapor during compression?

• It increases in pressure and temperature.

• It decreases in pressure and temperature.

• It turns into a liquid.

• It remains unchanged.

During condensation, what does the hot refrigerant release to the surroundings?

• The hot refrigerant releases heat to the surroundings during condensation.

• The hot refrigerant absorbs heat from the surroundings during condensation.

• The hot refrigerant releases cold to the surroundings during condensation.

• The hot refrigerant absorbs cold from the surroundings during condensation.

What is the typical range of COP values for refrigeration systems?

• 2 to 4

• 1 to 2

• 4 to 6

• 6 to 8

The primary function of the compressor in a refrigeration system is to:

• increase the temperature of the refrigerant

• decrease the temperature of the refrigerant

• circulate the refrigerant through the system

• convert the refrigerant from gas to liquid

Which of the following is NOT a type of compressor technology mentioned in the passage?

• Reciprocating

• Scroll

• Rotary

• Hydraulic

How do the condenser and evaporator function in a refrigeration system?

• The condenser cools the refrigerant, and the evaporator absorbs heat from the environment.

• The condenser absorbs heat from the environment, and the evaporator cools the refrigerant.

• Both the condenser and evaporator cool the refrigerant.

• Both the condenser and evaporator absorb heat from the environment.

The function of the expansion valve in a refrigeration system is to:

• regulate the flow of refrigerant into the evaporator

• compress the refrigerant gas

• condense the refrigerant into a liquid

• absorb heat from the surroundings

What are the components used in modern systems to optimize energy consumption?

• Microcontrollers and sensors

• Cooling fans and heat sinks

• LED lights and solar panels

• Batteries and capacitors

True or False: The refrigeration cycle transfers heat from a warmer space to a cooler space.

• True

• False

What happens to high-pressure liquid when it passes through the expansion device?

• It turns into a high-pressure gas.

• It remains a high-pressure liquid.

• It turns into a low-pressure liquid.

• It turns into a low-pressure gas.