单项选择题
The jacket water temperature in a diesel engine closed freshwater cooling system is normally controlled by （）
A.regulating the level of corrosion inhibitor in the primary cooling system
B.the level of the freshwater expansion tank
C.varying the engine load to meet temperature requirements
D.the operation of the thermostatic valve
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相关考题
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单项选择题
For diesel engine piston cooling, lubricating oil can be supplied to the pistons by a/an （）.
A.oil spray
B.oil bath
C.oil control rings
D.drilled passage through the camshaft -
单项选择题
In a four-stroke/cycle diesel engine, the camshaft rotates at （）
A.twice the crankshaft speed
B.half the crankshaft speed
C.the same speed as that of the crankshaft
D.a speed independent of that of the crankshaft -
单项选择题
A restricted air intake to a diesel engine may result in the engine （）.
A.failing to reach rated speed
B.knocking under maximum load
C.hunting or surging under light load
D.overspeeding and running away
