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

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


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1.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

2.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

3.單項(xiàng)選擇題Before starting an air compressor, It should be ().

A.unloaded
B.primed
C.filled with water
D.greased

4.單項(xiàng)選擇題Before starting an air compressor, It should be ().

A.turned
B.oil level checked
C.filled with water
D.A and B

5.單項(xiàng)選擇題The air compressor pumps air to the().

A.engine cylinder
B.air bottle
C.evaporator
D.condenser

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