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单选题
Internal combustion engine crankcase vent outlets must be equipped with （）
A
hinged rain guards
B
corrosion resistant flame screens
C
dipsticks for measuring oil levels
D
crankcase ventilation fans
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单选题In a diesel engine, blow-by is a result of combustion gases leaking into the crankcase past the （）A
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low-velocity spray applicatorC
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单选题If a crankcase explosion occurs in a diesel engine, you should stop the engine and（）A
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考题
单选题For one or two types of engine,the piston and rod can be withdrawn downwards from the cylinder into the crankcase and then out through （）.A
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单选题The diesel engine is a type of （）.A
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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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单选题Proper dispersion of fuel in a diesel engine cylinder is dependent upon the （）A
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shape of combustion spaceC
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all of the above
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