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单选题
Diesel engine piston ring blow-by is usually caused by excessive ring clearance at the ring（）
A
back
B
side
C
gap
D
bottom
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单选题In a four-cycle diesel engine piston blow-by can result in increased（）A
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单选题Which of the following statements represents the function of the compression rings installed at the top of a diesel Engine piston?（）A
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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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compression ringsC
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单选题Diesel engine ‘blow-by’ into the crankcase is caused by excessive ring（）A
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单选题A condition contributing to diesel engine piston rings sticking in the ring grooves, is insufficient ring clearance at the ring（）A
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单选题When installing rings on a diesel engine piston, you should check the ring（）A
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单选题In a diesel engine, excessive cylinder liner wear will cause （） Ⅰ.increased blow-by Ⅱ.wear between the piston ring and grooveA
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faulty combustionB
excessive ring temperatureC
over lubricationD
all of the above
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