單項(xiàng)選擇題

An air compressor can be unloaded at start-up by （）.

A.holding the discharge valve open
B.relieving the intercooler pressure to the atmosphere
C.using an enlarged, permanently opened clearance expansion space
D.a pre-charged accumulator

你可能感興趣的試題

單項(xiàng)選擇題

Machinery driving fuel oil transfer and fuel oil service pumps must be fitted with a remote means of stopping the machinery from （）.

A.within the space concerned
B.outside the space concerned
C.the throttle station
D.within the fire room

單項(xiàng)選擇題

If an electric motor driven air compressor fails to start, it may be due to a （）.

A.leaking discharge valve
B.jammed suction valve
C.tripped overload relay
D.broken discharge un-loader