單項選擇題

Telescopic pipes to the piston of a large slow-speed main propulsion diesel engine are designed to prevent （）.

A.excessive crankcase pressure
B.excessive lube oil temperature
C.contamination of the lube oil by water
D.contamination of the cooling water by lube oil

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單項選擇題

The water in an auxiliary boiler should be tested daily for （）.

A.dissolved oxygen
B.chlorides
C.sludge
D.dissolved nitrogen

單項選擇題

A feed pump for an auxiliary boiler might lose suction if the （）.

A.boiler water level is low
B.feedwater is too hot
C.boiler steam demand is low
D.feedwater is too cold

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Telescopic pipes to the piston of a large slow-speed main propulsion diesel engine are designed to prevent （）.

你可能感興趣的試題

The water in an auxiliary boiler should be tested daily for （）.

A feed pump for an auxiliary boiler might lose suction if the （）.