單項選擇題

In diesel engines designed with a crosshead, the motion of the piston rod can be described as （）.

A.reciprocating at the piston pin, rotary at the crank pin
B.reciprocating at the crank pin, rotary at the piston pin
C.straight reciprocation
D.straight rotation

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單項選擇題

Immediately after any diesel engine is started, the engineer should check the （）

A.crankcase pressure
B.lube oil pressure
C.saltwater pressure
D.exhaust temperature

單項選擇題

The rate of heat transfer in a water-tube auxiliary boiler can be increased by （）.

A.operating the boiler at less than normal water level
B.installing fins on the firesides of water-tubes
C.increasing the amount of excess air to the burners
D.treating the boiler water with chemical oxygen scavengers

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In diesel engines designed with a crosshead, the motion of the piston rod can be described as （）.

你可能感興趣的試題

Immediately after any diesel engine is started, the engineer should check the （）

The rate of heat transfer in a water-tube auxiliary boiler can be increased by （）.