單項(xiàng)選擇題The efficient burning of fuel in a diesel engine is dependent upon the （）

A.temperature of compression
B.atomization of the fuel
C.penetration of the fuel
D.all of the above


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1.單項(xiàng)選擇題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

2.單項(xiàng)選擇題Engine coolant accumulating in the diesel engine lubricating oil can result from a （）

A.low oil pressure
B.high coolant pressure
C.leaking fuel injector
D.cracked cylinder head or liner

3.單項(xiàng)選擇題The device used to limit engine torque at various engine speeds is called a （）

A.speed limiting governor
B.variable speed governor
C.constant speed governor
D.load limiting governor

4.單項(xiàng)選擇題A fuel leak occurs in the high pressure fuel piping between the injection pump and fuel nozzleThis requires immediate repair because of the （）

A.high cost of fuel
B.serious fire hazard
C.possibility of pollution
D.poor combustion which will occur in that cylinder

5.單項(xiàng)選擇題Lube oil accumulating in the cooling water system of a diesel engine will result in （）

A.lube cooler failure
B.poor heat transfer
C.mechanical lubricator failure
D.camshaft seizure