单选题Defective governor in a diesel engine may lead to （）.A smoky exhaustB starting failureC ignition relayD over speed

In a main propulsion turbocharged diesel engine, the speed of the turbocharger varies according to the _____.

A.governor droop

B.speeder spring tension

C.fuel rack lag

D.load on the engine

On a diesel engine equipped with a hydraulic speed control governor, hunting in many cases can be corrected by adjusting the______.

A.accumulator spring compression

B.balance piston

C.compensating(补偿) needle valve

D.proportional piston

For most diesel propulsion and generator engines, the over-speed trip device will stop the engine by

A.moving the governor control to stop

B.shutting off the lubricating oil supply

C.tripping the governor emergency stop lever

D.shutting off the fuel supply

One of the factors limiting the amount of toad which can be put on a modem marine diesel engine is the_______.

A.governor sensitivity

B.exhaust temperature

C.fuel injection pressure

D.speed of the cam shaft

A bypass line provided around a waste heat auxiliary boiler in a diesel engine exhaust system, may be used to avoid boiler ______.

A.corrosion at low engine loads

B.erosion at high engine loads

C.overload at high engine loads

D.scaling at all exhaust temperatures

If an auxiliary diesel engine coolant temperature is higher than normal, but the thermostat is determined not to be defective, you would suspect a/an

A.cavitation erosion in the water jackets

B.excess corrosion inhibitor in the coolant

C.dirty jacket water cooler

D.defective turbocharger