Hvac - components except compressor

A condenser is one of the parts in an automotive A/C system. What is the function of the condenser?

• to act as a heat exchanger to dispel the heat energy contained in the refrigerant

• to allow only liquid refrigerant to flow to the expansion valve

• to ensure it is free from dirt to stop any excessive wear or premature failure of components

• ensures that the entire liquid refrigerant inside the evaporator has been vaporized from a liquid

The condenser comes in various designs. Which is NOT TRUE for the condenser design?

• Serpentine

• Tube and plate

• Tube and circular

• Parallel flow

What is the ideal condition for a condenser?

• is position between the compressor and receiver drier

• should have no pressure drop between the inlet and the outlet

• having desiccant to clean and absorb moisture

• able to sense pressure and no external tubes

Which car segment is suitable to have dual condenser?

• Compact car (ex: Axia)

• Sedan car (ex: Saga)

• MPV car (ex: Estima)

• 4x4 pickup car (ex: Triton)

Which statement is NOT TRUE for receiver drier?

• Refrigerant entering the receiver-drier in an ideal system will be in a liquid state

• Liquid will fall to the bottom of the receiver while vapor will rise to the top

• The refrigerant flows through the desiccant and filter to get to the outlet pickup tube

• Tubes to carry the refrigerant and fins to increase the surface area in contact with the outside air

Which is NOT TRUE of the function of a receiver drier in an automotive A/C system?

• To ensure the system is free from dirt preventing any excessive wear or premature failure of components

• To remove moisture from the refrigerant ensuring no ice can form on any components within the system

• the point within the A/C system which is used to remove the unwanted heat

• To act as a temporary reservoir to supply the system under varying load conditions

Which is TRUE for an accumulator in an automotive A/C system?

• liquid will fall to the bottom while vapor will rise to the top.

• fitted between the evaporator and the compressor

• not used to stored lubricating oil for the compressor

• to control the amount of refrigerant volume flowing in the system

Which is NOT TRUE of the functions of a metering device in an automotive A/C system?

• To separate the high pressure and low-pressure side of the system

• To meter the volume of refrigerant and hence the cooling capacity of the evaporator

• To act as a temporary reservoir to supply the system under varying load conditions

• To ensure that there is superheated refrigerant exiting the evaporator

The statement is TRUE for a situation where an accumulator must be replaced, EXCEPT:

• the A/C system is opened to moisture for more than 3 hours

• under service conditions – every two years

• excessive moisture in system causing icing

• leaking refrigerant at compressor inlet

In your opinion, which metering device mechanism is design to prolong lifespan of a compressor?

• fixed orifice valve (FOV)

• expansion valve (TXV)