When the diesel is stopped, which of the following items is wrong?（）

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• If a diesel engine has been stopped because of piston seizure due to severe overheating, the crankcase（）

  A . inspection covers should not be opened until the engine has cooled B . ventilation system should be continued in operation for one hour for cooling C . scavenge pump should be immediately secured to prevent loss of lube oil D . explosion covers should be opened slightly to provide extra ventilatio

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• During maneuvering operations for a direct reversing large, low-speed, main propulsion diesel engine, which of the following actions is used to stop the shaft from turning prior to reversing the engine rotation?（）

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• When the opening pressure of a diesel fuel injector is greater than that specified by the engine manufacturer，the （）

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• An over-speed trip stops a diesel engine when the engine （）

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• In a diesel engine, when the fuel is injected into the cylinder,（）

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• Before shutting off the fuel supply to stop a medium or high–speed diesel engine, why is it necessary to allow the engine to idle for a few minutes?（）

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• If a crankcase explosion occurs in a diesel engine, you should stop the engine and（）

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• When a diesel engine is operate at partial load, as compared to full load ,a decrease will occur in the average （）

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• When the normal compression ratio of a diesel engine is not very high, misfiring at light loads may be caused by （）

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• When the load is increased on a turbocharged diesel engine, the amount of increased air supplied by the turbocharger will___________.

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