To avoid liquid slugging in a direct expansion evaporator after shutting down a reciprocating or rotary compressor refrigerating system which of the following measures needs to be taken?
a) Pump down the evaporator
b) Fill the compressor with liquid refrigerant
c) Fill the evaporator with refrigerant vapour
d) Open all the suction valves on the connecting condenser line
e) Discharge all the condenser refrigerant into the evaporator
Answer: A