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


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1.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

2.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