單項(xiàng)選擇題

If a crankcase explosion occurs in a diesel engine, which of the listed actions should be taken?（）

A.Open the crankcase immediately to check for damage
B.Apply fire fighting water through the crankcase breather
C.Allow the engine to cool before opening the crankcase
D.Assume that there is no damage to the crankshaft

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單項(xiàng)選擇題

A substance found in residual fuels which tends to cause exhaust valve corrosion and grooving, is（）

A.carbon
B.vanadium
C.calcium
D.hydrogen

單項(xiàng)選擇題

If the turbocharger of a four-stroke/cycle diesel engine fails to operate, which of the following statements best describes the probable effect?（）

A.Intake manifold pressure will be high
B.Intake manifold pressure will be unaffected
C.Exhaust temperatures will be high
D.Exhaust temperatures will be low

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If a crankcase explosion occurs in a diesel engine, which of the listed actions should be taken?（）

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A substance found in residual fuels which tends to cause exhaust valve corrosion and grooving, is（）

If the turbocharger of a four-stroke/cycle diesel engine fails to operate, which of the following statements best describes the probable effect?（）