单项选择题Which of the following procedures should be carried out when a large, low-speed, diesel engine is operated with one cylinder secured?()

A.Lubrication to the defective cylinder should be increased
B.Cooling water temperature to the engine should be increased
C.Only the turbocharger speed should be reduced
D.Engine speed should be reduced


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1.单项选择题A diesel engine could fail to start because of ()

A.incorrect injection timing
B.low exhaust back pressure
C.floating exhaust valves
D.excessive cranking speed

2.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

3.单项选择题If you observe smoke coming from the turbocharger of an auxiliary diesel engine, you should()

A.check the air filter for obstruction
B.check for an exhaust leak
C.check the exhaust temperature
D.secure the engine

4.单项选择题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

5.单项选择题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

6.单项选择题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

7.单项选择题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

8.单项选择题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

9.单项选择题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

10.单项选择题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