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单选题
Excessive vibration in an operating diesel generator may be caused by （）
A
electrical overload
B
surging at governed RPM
C
loose engine mounting bolts
D
coolant leaking into the cylinder
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contaminated fuelC
kinked fuel linesD
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单选题The possibility of damage from operating a diesel engine at critical speeds is reduced by the use of（）.A
an isochronous governorB
elastic engine mountsC
a vibration damperD
a cast iron bed plate with good flexible qualities
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单选题White smoke exhausting from an operating diesel engine may indicate （）.A
a cracked linerB
burning lube oilC
an overloaded engineD
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单选题If the operating element of a thermostatic valve installed in a diesel engine cooling system malfunctions, it may result in （）A
a low level in the engine expansion tankB
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单选题A practical way of checking for excessive fuel injection in one cylinder of an operating diesel engine is to （）A
feel the high pressure fuel lineB
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单选题Excessive diesel engine back pressure may be an indication of （）A
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overcooling of the exhaust manifoldC
eroded muffler baffle platesD
high injection pressure
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Hydraulic stress and distortion will developB
Hot spots will developC
Fuel oil viscosity will increasedD
An increase in trapped deposits of scale and dirt
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单选题An emergency diesel generator should automatically shut down in the event of （）A
dangerous over-speedingB
a loss of lube oil pressureC
activation of the fixed CO2 system for the emergency generator spaceD
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Critical speedC
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lightened crankshaft flywheelD
spherically seated crankshaft bearing
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an incorrect diesel generator governor speed droop adjustmentB
a faulty reverse power relay within the main circuit breaker assemblyC
unsynchronized isochronous load distribution adjustmentsD
a different speed setting on each unit
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单选题What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?（）A
Spark plugB
Heat of compressionC
CarburetorD
Glow plug
考题
单选题The most common diesel engine fuel system problems are caused by （）.A
incorrect adjustmentsB
dirty fuelC
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考题
单选题A four-stroke cycle, turbocharged, 1000 horsepower diesel engine has been operating under loadThe load suddenly increases, causing excessive black exhaust smoke, and a rapid rise in the lube oil temperatureIn response to this condition, you should:（）A
reduce loadB
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adjust cooling water temperatureD
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单选题Which of the following conditions may need to be reduced when operating a large, low speed, main propulsion, diesel engine at low loads?（）A
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Control air supply pressureC
Cooling water flow through after-coolersD
Lube oil temperature
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