單項(xiàng)選擇題The oil is drawn from a drain tank through (), one of a pair of pumps, into one of fine filters.

A.a strain tank
B.a head tank
C.a service tank
D.a strainer


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4.單項(xiàng)選擇題The most common cause of lowering the crankcase lube oil flash point is ().

A.more water contents
B.contamination with fuel oil
C.higher temperature
D.sufficient cooling of oil mist

5.單項(xiàng)選擇題The mechanical efficiency of an engine () because losses occur in the form of friction.

A.is always less than 100%
B.is always more than 100%
C.is always equal to 90%
D.is always less than 90%

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If the main engine of an unattended engine room shuts down automatically, it will be indicated by an alarm ().

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When would the available energy of the exhaust gases of a two-stroke/cycle diesel engine be insufficient to drive an exhaust gas turbocharger, resulting in the incorrect amount of air for combustion?()

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Maximum horsepower of a diesel engine is attained ().

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In diesel engines, the four basic events (intake, compression, power and exhaust) are performed once in ().

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If a diesel engine is difficult to start and operates with the engine temperatures lower than normal, you should suspect that the ().

題型:?jiǎn)雾?xiàng)選擇題

How many power strokes per crankshaft revolution are there in an eight cylinder, two stroke/cycle diesel engine?()

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A diesel engine is operating with excessively high exhaust temperatures at all cylindersTo correct this condition, you should FIRST ().

題型:?jiǎn)雾?xiàng)選擇題

The ability of the governor to prevent fluctuations in engine speed is termed ().

題型:?jiǎn)雾?xiàng)選擇題

Combustion knock can occur in the cylinders of a diesel engine under any condition permitting ().

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Which of the two events listed occurs simultaneously in a two-stroke/cycle diesel engine?()

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