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


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1.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

2.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

3.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

4.單項(xiàng)選擇題Black smoke exhausting from a diesel engine indicates()

A.proper fuel injection
B.water in the fuel
C.incomplete combustion
D.burning of lube oil

5.單項(xiàng)選擇題Engine operating conditions may be indicated by the color of the exhaust smoke.Black smoke could indicate()

A.an insufficient speed droop setting
B.an overloaded engine
C.clogged drain holes in the oil control rings
D.complete combustion