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单选题
Excessive vibration in an operating diesel generator may be caused by （）
A
electrical overload
B
surging at governed RPM
C
loose engine mounting bolts
D
coolant leaking into the cylinder
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elastic engine mountsC
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a cracked linerB
burning lube oilC
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eroded muffler baffle platesD
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dangerous over-speedingB
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an incorrect diesel generator governor speed droop adjustmentB
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unsynchronized isochronous load distribution adjustmentsD
a different speed setting on each unit
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单选题What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?（）A
Spark plugB
Heat of compressionC
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单选题The most common diesel engine fuel system problems are caused by （）.A
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单选题A four-stroke cycle, turbocharged, 1000 horsepower diesel engine has been operating under loadThe load suddenly increases, causing excessive black exhaust smoke, and a rapid rise in the lube oil temperatureIn response to this condition, you should:（）A
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