单项选择题
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
单项选择题 If you observe smoke coming from the turbocharger of an auxiliary diesel engine, you should（）
单项选择题 Clogged or partially obstructed exhaust ports on a diesel engine can cause（）
单项选择题 A diesel engine is turned at normal cranking speed and no ignition occursThis could be the result of （）
