单项选择题A device which functions to bring a diesel engine to a full stop to protect it from damage is known as a/an ()

A.torque limiter
B.over-speed trip
C.over-speed governor
D.load limit governor


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1.单项选择题Black smoke exhausting from an operating diesel engine can be caused by ()

A.fuel dribbling from leaking fuel injectors
B.burning fuel with a high carbon content
C.burning fuel with a high vanadium content
D.burning fuel with a lower sulphur content

2.单项选择题White smoke exhausting from a diesel engine can be caused by a ()

A.high combustion temperature
B.high compression pressure
C.cracked cylinder liner
D.fuel with a high vanadium content

3.单项选择题White smoke exhausting from a diesel engine can be caused by ()

A.low combustion temperature
B.a leaking fuel nozzle check valve
C.late fuel injection
D.plugged oil-scraper ring hole

4.单项选择题White smoke issuing from the exhaust of an auxiliary diesel engine valve opening ()

A.the engine is overloaded
B.the engine is cold
C.there is too much lube oil in the cylinders
D.the turbocharger is fouled

5.单项选择题White smoke exhausting from a diesel engine can result from ()

A.high exhaust temperature
B.high lube oil temperature
C.low turbo-charger speed
D.low cooling water temperature

6.单项选择题White smoke exhausting from an operating diesel engine may indicate ()

A.a cracked liner
B.burning lube oil
C.an overloaded engine
D.insufficient combustion air

7.单项选择题The over-speed trip installed on most diesel engine will stop the engine by shutting off the ()

A.water supply
B.fuel oil supply
C.lube oil supply
D.exhaust damper

8.单项选择题The blower type crankcase ventilation system ()

A.removes combustible gases in the crankcase
B.prevents the formation of combustible gases in the crankcase
C.cools lubricating oil
D.improves cold weather starting

9.单项选择题One remedy for a high firing pressure, in addition to a high exhaust temperature in one cylinder of a diesel engine, is to ()

A.increase scavenge air pressure
B.reduce fuel booster pump pressure
C.adjust the fuel rack
D.retard fuel injector timing

10.单项选择题What is the best way of stopping an over-speeding diesel engine?()

A.Disconnect the battery cables from the starting motor
B.Drain the hydraulic fluid from the governor sump
C.Block the flow of cooling air to the radiator
D.Secure the fuel supply and block the air intake