A compressor is used to produce electric power.（)

A.Fan air

B.HP compressor 5th stage air

C.HP compressor 4th and 9th stage air

The expansion valve used in a refrigeration system regulates the

A.superheat of the gas leaving the compressor

B.back pressure in the evaporator

C.temperature in the refrigerated space

D.degree of superheat of the gas leaving the evaporator

A．flame trap

B．a relief valve

C．a fusible plug

D．a bursting ca

Which method is used to supply inert gas from a flue gas system to the cargo tanks？

A.Exhaust gas pressure from the stack

B.High capacity fan

C.Inert gas compressor

D.Natural aspiration

A.EQ

B.WordCloc

C.MicPre

D.Compressor/Limiter

A.receiver

B.evaporator

C.condenser

D.compressor

If the refrigeration compressor crankcase is sweating, the cause may be due to

A.a shortage of refrigerant

B.the compressor running continuously

C.liquid refrigerant returning to the compressor

D.the compressor short cycling on the high pressure cutout

A、Theexpansionvalve

B、Compressor

C、Evaporator

D、Condenser