REFRIGERATOR AND AIR-CONDITIONING

What is the primary function of a refrigeration system?

• To generate heat

• To remove heat from a designated area

• To increase humidity

• To purify air

What is the function of Expansion Valve

• Convert High pressure liquid in to a low pressure gas

• Convert low pressure liquid in to a high pressure gas

Which refrigerant is commonly used in domestic refrigerators?

• R-22 (chlorodifluoromethane)

• R-134a (tetrafluoroethane)

• Ammonia ( NH3)

• CO2

The Coefficient of Performance (COP) is defined as:

• The ratio of heat removed to work input

• The ratio of work input to heat removed

• The efficiency of the compressor

• The amount of refrigerant used

In a vapor compression refrigeration cycle, which component is responsible for compressing the refrigerant?

• Evaporator

• Condenser

• Expansion valve

• Compressor

What happens to the refrigerant in the evaporator?

• It condenses into liquid

• It absorbs heat and evaporates

• It is compressed into high pressure

• It is cooled and stored

Which of the following secondary refrigerant?

• R-12

• Ammonia

• Water & Brine Solution

• R-22

Where does the lowest occur in cycle? a vapour temperature compression

• Condenser

• Evaporator

• Compressor

• Expansion valve

When the high vapor release it's turn to a liquid

• Condenser

• Evaporator

• Compressor

• Expansion valve

Dropping of temperature

• Condenser

• Evaporator

• Compressor

• Expansion valve