單項(xiàng)選擇題A centrifugal pump can’t supply water after startingYou should check ().

A.priming water
B.power supply
C.packing gland
D.bearing lubrication


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1.單項(xiàng)選擇題Open the ()of inter cooler before starting an air compressor.

A.cylinder cover
B.cooling water
C.oil cup
D.drain valve

2.單項(xiàng)選擇題Open the ()before starting an air compressor.

A.unload valve
B.cooling water
C.oil cup
D.sump

3.單項(xiàng)選擇題Supply the ()before starting an air compressor.

A.fuel oil
B.cooling water
C.steam
D.power

4.單項(xiàng)選擇題During working of an air compressor, () should be drained.

A.oil sump
B.oil separator
C.outlet pipe
D.inlet pipe

5.單項(xiàng)選擇題During working of an air compressor, () should be drained.

A.inter cooler
B.cylinder
C.outlet pipe
D.inlet pipe

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