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单选题
If the firing pressures in a diesel engine are high, although the exhaust temperatures are normal, the cause may be（）
A
early injection timing
B
worn orifices in the injection nozzles
C
worn or scored cylinder liners
D
using a fuel with too low of a cetane number
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更多 “单选题If the firing pressures in a diesel engine are high, although the exhaust temperatures are normal, the cause may be（）A early injection timingB worn orifices in the injection nozzlesC worn or scored cylinder linersD using a fuel with too low of a cetane number” 相关考题
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decreased piston to cylinder head clearanceB
increased exhaust system back pressureC
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low firing pressureB
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