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单选题
Crankcase explosions in propulsion diesel result from（）
A
the splashing of lubrication oil by the crankshaft
B
the dilution of crankcase oil with particles of combustion
C
broken fuel lines spraying oil on the crankcase
D
the ignition of unburned fuel and air in the crankcase
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Crankcase explosions in propulsion diesel engines result fromA.the splashing of lubrication oil by the crankshaftB.the dilution of crankcase oil with particles of combustionC.broken fuel lines spraying oil on the crankcaseD.the ignition of unburned fuel and air in the crankcase
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high coolant pressureC
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考题
单选题How dose water enter the crankcase of a diesel engine?（）A
Through the crankcase exhausterB
As water vapor contained in blow-byC
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考题
单选题In a normally operating diesel engine, the main cause of lubricating oil contamination in the crankcase is a result of the （）.A
metal particles loosened by wearB
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考题
单选题If a crankcase explosion occurs in a diesel engine, which of the listed actions should be taken?（）A
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Apply fire fighting water through the crankcase breatherC
Allow the engine to cool before opening the crankcaseD
Assume that there is no damage to the crankshaft
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