单选题Persistent knocking of one cylinder of a diesel engine ceases when the fuel supply to that cylinder is securedThis problem may be a result of ()Alow loading of that cylinderBfaulty combustion in that cylinderCsluggish piston ring actionDexcessive piston cooling

单选题
Persistent knocking of one cylinder of a diesel engine ceases when the fuel supply to that cylinder is securedThis problem may be a result of ()
A

low loading of that cylinder

B

faulty combustion in that cylinder

C

sluggish piston ring action

D

excessive piston cooling


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One cylinder of a diesel engine is persistently knocking and does not cease(停止) when the fuel supply to that cylinder is secured.Which of the following problems may be the cause?A.Low loading of the cylinderB.Excessive cooling of that pistonC.Sluggish ring action on the pistonD.A mechanical defect in a working part

Persistent knocking in one cylinder of an eight cylinder diesel engine would MOST likely be caused by______.A.using fuel oil with low cetane numberB.a badly worn piston pinC.a loose flywheel keyD.a loose bed plate bolt

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单选题One result of operating a diesel engine at light load with excessively low cooling water temperature is a/an ()Adecrease in ignition lagBincrease in fuel economyCreduction in lube oil viscosityDincrease in cylinder misfiring

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