單項(xiàng)選擇題Clogged or partially obstructed exhaust ports on a diesel engine can cause（）

A.over-speeding of the engine
B.failure of the engine to shut down
C.no effect of engine mounting bolts
D.high exhaust temperatures


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1.單項(xiàng)選擇題A diesel engine is turned at normal cranking speed and no ignition occursThis could be the result of （）

A.low lube oil temperature
B.low starting air temperature
C.air bubbles in the fuel oil system
D.water in the starting air system

2.單項(xiàng)選擇題Which of the listed failures, occurring in an automated diesel generator system, should cause an audible alarm at the engine room control station?（）

A.Low cooling water outlet temperature
B.High lube oil pressure
C.Low lube oil temperature
D.Low starting air pressure

3.單項(xiàng)選擇題A diesel engine may be hard to start if the （）

A.air intake is restricted
B.engine is cranked too fast
C.vibration dampener is faulty
D.exhaust back pressure is low

4.單項(xiàng)選擇題If a diesel engine rotates slowly when cranked, but does not fire, the（）

A.fuel control rack had admitted excessive fuel
B.engine speed does not match the fuel rack setting
C.engine has failed to reach its firing speed
D.starter pinion and ring gear contact is not correct

5.單項(xiàng)選擇題When starting air is admitted, a diesel engine turns over very slowly without firingThe cause may be （）

A.an obstruction in an cylinder
B.water accumulation in some engine cylinders
C.low starting air pressure
D.low scavenge air pressure