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单选题
If a diesel engine were running at 20% overload with a smoky exhaust, you should（）
A
stop the engine immediately to prevent damage
B
increase lube oil pressure
C
slow the engine allowing it to gradually cool
D
decrease the cooling water it temperature to the water jacket
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notify the duty officer and stop the engine immediately, find the cause and remove failuresC
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lube oil viscosity breakdownC
uneven heat expansion of the ringsD
uneven heat expansion of the piston
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单选题A dark exhaust from a running diesel engine can be caused by （）A
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water in the fuelC
high compression temperatureD
starting valve stuck open
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单选题The size of the exhaust valve opening is （）A
most critical in a four-stroke cycle diesel engineB
most critical in a two-stroke/cycle diesel engineC
most critical in a four-stroke/cycle diesel engine if it is turbochargedD
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考题
单选题The most practical way of detecting an overload in one cylinder of an operating large, low-speed ,main propulsion diesel engine is to （）A
check the cylinder exhausts for black smokeB
listen for combustion knock in that cylinderC
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check the cylinder exhaust temperature frequently
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单选题The load limitation of governor should be reduced when ship navigating at sea, the main reason is to（）A
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单选题What is one effect of running a diesel engine at too cool a temperature? （）A
Buildup of sludge in the lubricating systemB
Excessive fuel consumptionC
Severe heat stresses on mechanical partsD
Foaming of the lubricating oil
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单选题In a large, slow-speed, main propulsion diesel engine, which of the parts listed is under tension when the engine is running?（）A
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ColumnC
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单选题The purpose of the flywheel of a diesel engine is to （）.A
counterbalance the crank throws on the crankshaftB
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provide a belt-driving surface for the operation of auxiliary machineryD
prevent the engine from overspeeding
考题
单选题If the action of the engine indicates that some of the cylinders are not firing, the ones affected may be determined by watching （）.A
the bad smokeB
the smoky exhaustC
the exhaust temperatureD
the peak pressure
考题
单选题During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.A
the highestB
above 3/4C
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考题
单选题If a four-stroke/cycle diesel engine is running at 1550 RPM, the speed of the camshaft will be（）.A
525 RPMB
775 RPMC
1550 RPMD
1800 RPM
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failing to reach rated speedB
knocking under maximum loadC
hunting or surging under light loadD
overspeeding and running away
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单选题High lube oil temperatures developing in a diesel engine can result from（）A
high oil pressureB
excessive bearing end playC
plugged oil control ringsD
engine overload
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单选题When running a large, low-speed, main propulsion diesel engine on heavy fuel, which of the following precautions should be observed when switching back over to diesel oil?（）A
The diesel oil must never be allowed to mix with the heavy fuelB
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The heating steam to the pre-heater should be secured as soon as the diesel fuel passes through the three-way valveD
The heating steam must be secured before the diesel oil passes through the three-way valve
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