單項選擇題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


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1.單項選擇題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

2.單項選擇題A spring-loaded centrifugal flyweight governor responds to reduced engine load with an immediate increase in （）

A.pilot valve oil pressure
B.speeder spring force
C.compensation needle valve clearance
D.centrifugal force on the flyweights

3.單項選擇題In order to start a large, low-speed, main propulsion diesel engine on high viscosity fuel after an extended shutdown, the （）

A.fuel must be preheated
B.intake air should be preheated
C.lube oil outlet temperature should be increased 20℃ above normal
D.none of the above

4.單項選擇題Excessive diesel engine back pressure may be an indication of （）

A.carbon buildup in the exhaust manifold
B.overcooling of the exhaust manifold
C.eroded muffler baffle plates
D.high injection pressure

5.單項選擇題A possible cause for an individual piston to knock when at TDC on a slow-speed, two-stroke/cycle main propulsion diesel engine could be due to （）

A.early fuel injection
B.excessive bearing play within the running gear
C.overloading of the cylinder
D.all of the above