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单选题
Low compression pressure in a diesel engine can be caused by（）
A
improperly seating intake valves
B
leaking cylinder liner seal rings
C
late fuel injection timing
D
carbon deposits on the piston
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low intake air temperatureC
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low air charge temperatureB
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late ignitionB
water in the fuelC
high compression temperatureD
starting valve stuck open
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单选题Low compression of diesel engine may result from （）A
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broken piston ringsC
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none of the above
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单选题The loss of the diesel engine cylinder air charge through leaky valves, piston rings, worn or scored liners, would be indicated by which of the following sets of conditions?（）A
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单选题A drop in compression pressure in one cylinder of a diesel engine can be caused by（）A
a leaking fuel injection nozzleB
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early fuel injectionD
burned valves
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low water in the expansion tankB
improperly seated valvesC
low fuel oil pressureD
worn or broken cylinder liner sealing rings
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worn or broken cylinder liner sealing ringsB
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单选题Low compression pressure in a diesel engine may be the result of （）A
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excessive mechanical clearance between the piston crown and cylinder headC
excessively worn fuel pump plungerD
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单选题When a diesel engine compression pressure is checked, the indicator is connected to the （）A
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单选题An indication of a diesel engine air intake being partially clogged, is （）.A
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