單項(xiàng)選擇題Diesel engine piston ring blow-by is usually caused by excessive ring clearance at the ring()

A.back
B.side
C.gap
D.bottom


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1.單項(xiàng)選擇題In a four-cycle diesel engine piston blow-by can result in increased()

A.crankcase pressure
B.compression pressure
C.scavenge pressure
D.exhaust manifold pressure

2.單項(xiàng)選擇題The most effective method in removing water from diesel fuel oil is by()

A.centrifuging the fuel
B.using it in the engine
C.heating the fuel tanks
D.starting the fuel

3.單項(xiàng)選擇題On board supply vessels, a centrifuge is normally used to purify()

A.cooling water
B.fuel oil
C.sea water
D.diesel intake air

4.單項(xiàng)選擇題Water accumulating in the crankcase of a diesel engine could indicate()

A.a cracked cylinder liner
B.excessive water in the fuel
C.a leaking intercooler
D.excessive moisture in the scavenge air

5.單項(xiàng)選擇題The device used to store a charged pressure for a hydraulic starting system is called the()

A.reservoir
B.hand pump
C.accelerator
D.accumulator

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