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单选题
Low compression in a diesel engine can be caused by （）
A
clogged coolant passages
B
a leaking cylinder head gasket
C
low fuel oil pressure
D
worn or broken cylinder liner sealing rings
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更多 “单选题Low compression in a diesel engine can be caused by （）A clogged coolant passagesB a leaking cylinder head gasketC low fuel oil pressureD worn or broken cylinder liner sealing rings” 相关考题
考题
Which of the following reasons represents why the designed compression ratio of a gasoline engine is lower than that of a diesel engine?A.compression must be low for effective spark ignitionB.compression must be low for required horsepower and torque generationC.compression must be low to prevent pre-ignitionD.compression must be low to have effective pre-ignition
考题
Combustion knock occurring in a diesel engine can be caused by _____.A.low coolant temperatureB.insufficient fuelC.high ambient temperatureD.carbon buildup on the injector tips
考题
A smoking exhaust from an operating diesel engine could be caused by( ).A.low sulfur content in the fuelB.a loose injector inlet connectionC.late fuel injectionD.high injection pressure
考题
Low compression in a diesel engine could be caused byA.worn or broken cylinder liner sealing ringsB.high cooling water temperatureC.worn or broken piston ringsD.low fuel oil pressure
考题
单选题Worn main bearings in a diesel engine can result in （）A
decreased compression pressureB
increased lube oil pressureC
lower lube oil temperatureD
excessive leakage past the piston rings
考题
单选题The ignition of the fuel in diesel engine is caused by the （） of compression of the air previously admitted into the cylinders.A
vacuum pressureB
specific gravityC
heatD
viscosity
考题
单选题Which of the listed problems can be a cause of low compression pressure in a diesel engine?（）A
clogged air filterB
compression strokeC
burned exhaust valvesD
all of the above
考题
单选题White smoke exhausting from a diesel engine can be caused by a （）A
high combustion temperatureB
high compression pressureC
cracked cylinder linerD
fuel with a high vanadium content
考题
单选题A sudden drop in diesel engine cylinder compression pressure can be caused by（）A
a leaking fuel injector nozzleB
a clogged air filterC
excessively early fuel injectionD
malfunctioning valves
考题
单选题Poor combustion in a diesel engine can be caused by （）.A
high compression pressureB
low intake air temperatureC
low exhaust pressureD
high scavenge air temperature
考题
单选题In an operating diesel engine, pre-ignition can be caused by （）A
excessively late fuel injectionB
oil in the air chargeC
water in the fuelD
injection continuing after the fuel charge is ignited
考题
单选题A dark exhaust from a running diesel engine can be caused by （）A
late ignitionB
water in the fuelC
high compression temperatureD
starting valve stuck open
考题
单选题Low compression of diesel engine may result from （）A
a worn cylinderB
broken piston ringsC
any of A and BD
none of the above
考题
单选题The loss of the diesel engine cylinder air charge through leaky valves, piston rings, worn or scored liners, would be indicated by which of the following sets of conditions?（）A
Low compression pressure and high exhaust temperatureB
Low firing pressure and high exhaust temperatureC
Low compression pressure and low exhaust temperatureD
Low firing pressure and low exhaust temperature
考题
单选题Late fuel oil injection in a diesel engine can result in （）A
fuel knockB
increased powerC
low compression pressureD
high exhaust temperature
考题
单选题When the normal compression ratio of a diesel engine is not very high, misfiring at light loads may be caused by （）A
overloading the engineB
low exhaust valve liftC
excessive cylinder coolingD
insufficient mechanical clearance
考题
单选题A drop in compression pressure in one cylinder of a diesel engine can be caused by（）A
a leaking fuel injection nozzleB
a clogged air filterC
early fuel injectionD
burned valves
考题
单选题High diesel engine cooling water temperatures can be caused by （）.A
air in the cooling systemB
an overhauled water pumpC
correct amount of coolantD
no air in the cooling system
考题
单选题Low compression pressure in a diesel engine is caused by（）A
low water in the expansion tankB
improperly seated valvesC
low fuel oil pressureD
worn or broken cylinder liner sealing rings
考题
单选题Low compression in a diesel engine could be caused by（）A
worn or broken cylinder liner sealing ringsB
high cooling water temperatureC
worn or broken piston ringsD
low fuel oil pressure
考题
单选题Low compression pressure in a diesel engine can be caused by（）A
improperly seating intake valvesB
leaking cylinder liner seal ringsC
late fuel injection timingD
carbon deposits on the piston
考题
单选题Persistent knocking in one cylinder of a diesel engine could be caused by（）.A
a low load on that cylinderB
sluggish piston ring actionC
excessive piston crown coolingD
excessive clearance of piston pin
考题
单选题Combustion knock occurring in a diesel engine can be caused by （）A
low coolant temperatureB
insufficient fuelC
high ambient temperatureD
carbon buildup on the injector tips
考题
单选题Which of the following reasons represents why the designed compression ratio of a gasoline engine is lower than that of a diesel engine?（）A
compression must be low for effective spark ignitionB
compression must be low for required horsepower and torque generationC
compression must be low to prevent pre-ignitionD
compression must be low to have effective pre-ignition
考题
单选题A sudden drop in compression pressure in one cylinder of a diesel engine can be caused by（）A
a leaking fuel injector nozzleB
a clogged air filterC
excessively early fuel injectionD
malfunctioning valves
考题
单选题Diesel engine piston seizure can be caused by （）A
poor cooling of cylinder wallsB
improper cooling of the pistonC
insufficient piston lubricationD
all of the above
考题
单选题High diesel engine cooling water temperatures can be caused by （）.A
a worn water pumpB
not enough coolantC
air in the cooling systemD
all of the above
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