Understanding Car Air Conditioning

Which component in a car’s air conditioning system is responsible for compressing the refrigerant gas?

• Condenser

• Compressor

• Evaporator

• Expansion valve

What is the primary function of the condenser in a car’s air conditioning system?

• To absorb heat from the cabin

• To compress the refrigerant

• To release heat to the outside air

• To filter the refrigerant

Which of the following is NOT a common refrigerant used in modern car air conditioning systems?

• R134a

• R12

• R744 (CO₂)

• R22

What is the main environmental concern associated with older refrigerants like R12?

• They are flammable

• They deplete the ozone layer

• They are too expensive

• They freeze at low temperatures

Which part of the air conditioning system is responsible for absorbing heat from the car’s interior?

• Compressor

• Condenser

• Evaporator

• Receiver-drier

What is the typical pressure unit used to measure refrigerant pressure in car air conditioning systems in the UK?

• psi

• bar

• atm

• pascal

Which of the following refrigerants is considered more environmentally friendly and is being adopted in newer vehicles?

• R12

• R134a

• R744 (CO₂)

• R22

What is the main purpose of the expansion valve in a car’s air conditioning system?

• To increase refrigerant pressure

• To regulate refrigerant flow into the evaporator

• To filter the refrigerant

• To cool the condenser

Which maintenance technique helps prevent mould and bacteria build-up in the air conditioning system?

• Regularly changing the oil

• Running the air conditioning weekly

• Cleaning the evaporator and replacing the cabin filter

• Topping up the coolant

What is the boiling point of R134a refrigerant at atmospheric pressure?