DIRECT EXPANSION AIR CONDITIONING - Quiz

1) How the indoor unit acts during heating cycle of heat pump?

Condenser Evaporator Expansion device Electrical heater

2) What is the purpose of evacuating the system before gas charging?

Flush oil particles Charge refrigerant Remove refrigerant Remove moisture and non-condensable

3) Which process is done to remove the oil and other impurities from the condenser tubes?

Purging Flushing Evacuation Pressurising

4) Which valve is first closed to start the pump down operation in central AC plant?

Receiver inlet valve Receiver outlet valve Suction service valve Discharge service valve

5) Which valve is used to release the non condensable gases from AC plant?

Purge valve Check valve Service valve Solenoid valve