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单选题
The most common diesel engine fuel system problems are caused by （）.
A
incorrect adjustments
B
dirty fuel
C
broken fuel lines
D
excessive vibration
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更多 “单选题The most common diesel engine fuel system problems are caused by （）.A incorrect adjustmentsB dirty fuelC broken fuel linesD excessive vibration” 相关考题
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The major cause of fuel pump and injection system problems is _____.A.improper adjustmentsB.contaminated fuelC.kinked fuel linesD.excessive engine vibration
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_______can be a direct cause of faulty operation of diesel engine fuel injection nozzles.A.Excessive fuel nozzle holder coolingB.Sediment in the fuel supplyC.Distortion of the fuel spray patternD.Improper atomization of the fuel
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One cylinder of a diesel engine is persistently knocking and does not cease(停止) when the fuel supply to that cylinder is secured.Which of the following problems may be the cause?A.Low loading of the cylinderB.Excessive cooling of that pistonC.Sluggish ring action on the pistonD.A mechanical defect in a working part
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Prolonged operation of a diesel engine with a closed cooling water system, at lower than normal designed operating temperatures can ______.A.increase power outputB.decrease lube oil viscosityC.eliminate fuel knockD.cause sulfuric acid formation
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单选题Dirt in a fuel oil system of a diesel engine can cause （）A
damage to strainersB
over-speeding of the engineC
excessive cooling of the engineD
injector damage
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单选题A supercharged diesel engine when compared to a similar naturally aspirated diesel engine, will develop an increase in （）A
ignition lagB
engine horsepowerC
lube oil system pressureD
specific fuel consumption
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单选题A leaking diesel engine fuel injector will cause（）A
prolonged maintenance intervalsB
improved atomizationC
greater fuel economyD
incomplete combustion
考题
单选题Leaking oil seals on a diesel engine turbocharger can cause（）A
the engine to run after the fuel has been securedB
the engine to over-speedC
a fireD
all of the above
考题
单选题Problems with the diesel engine fuel injection pump are usually caused by（）A
improper adjustmentB
contaminated fuelC
kinked fuel linesD
excessive engine vibration
考题
单选题Air in the fuel lines of a diesel engine can cause （）A
ignition failureB
oxygen corrosion of the fuel linesC
the pistons to seizeD
blue smoke
考题
单选题When the opening pressure of a diesel engine fuel injector is greater than that specified by the engine manufacturer, which of the following problems can be expected?（）A
Quantity of fuel injected tends to be decreasedB
Quantity of fuel injected will always be increasedC
Start of injection tends to be advancedD
Duration of injection will always greater
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单选题Burning fuel with a high sulfur content in a diesel engine will （）A
increase thermal efficiencyB
cause clogging of the fuel systemC
increase the ability of the engine to start in cold weatherD
produce corrosion in the cylinder and exhaust system at low loads
考题
单选题Which of the following conditions could be a cause of excessive fuel dilution of diesel engine lube oil?（）A
Leaking fuel injectorsB
Lower than normal compressionC
Delayed fuel injectionD
All of the above are correct
考题
单选题Dirt in the fuel oil system of a diesel engine can cause （）.A
clogged filtersB
poor combustionC
overloading of the dieselD
shock of fuel lines
考题
单选题The high pressure in fuel injection system of the diesel engine is produced by the （）.A
injector pumpB
fuel injectorC
governorD
turbocharger
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单选题If a diesel engine turned over at normal cranking speed but failed to start, the cause could be late fuel injection or （）A
excessive fuel pressureB
high lube oil viscosityC
inadequate fuel injectionD
excessive starting air pressure
考题
单选题The fuel injection pumps on a diesel engine are controlled by a linkage system attached to the （）A
camshaftB
crankshaftC
governorD
flywheel
考题
单选题Permitting a diesel engine fuel oil day tank to run dry can cause （）A
overheated injection pumpsB
water condensation in the cylindersC
fuel dilution of the lube oilD
air in the fuel system
考题
单选题The major cause of fuel pump and injection system problems is （）A
improper adjustmentsB
contaminated fuelC
kinked fuel linesD
excessive engine vibration
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单选题Which of the following problems can cause fluctuating pressures in the closed cooling system of a main propulsion diesel engine?（）A
Defective temperature controls in the systemB
Cavitation in the cooling water pumpC
Opened vent in the cooling systemD
Restricted water passages in the engine
考题
单选题A distorted spray pattern from a fuel injector can cause a diesel engine to have （）A
higher firing pressureB
more power outputC
lower fuel pressureD
less power output
考题
单选题Faulty operation of diesel engine fuel injection nozzles can be a direct cause of（）.A
excessive fuel nozzle holder coolingB
sediment in the fuel supplyC
distortion of the fuel spray patternD
improper atomization of the fuel
考题
单选题The most common instrument used to measure diesel engine exhaust pressure is the （）A
pyrometerB
bourdon gaugeC
pneumercatorD
manometer
考题
单选题Clogged diesel engine fuel oil filters can cause（）A
loss of powerB
misfiringC
low fuel oil pressureD
All of the above
考题
单选题Sudden unloading of a diesel engine can cause（）.A
decreased fuel efficiencyB
increased exhaust temperatureC
black smokeD
overspeed trip
考题
单选题Air in the fuel lines to the fuel injection nozzles of a diesel engine will cause the engine to （）A
burn excessive amounts of lube oilB
overheat without smokingC
operate with reduce power or stopD
run away without load
考题
单选题After changing out the fuel filters the diesel engine fails to restart, the most probable cause for this condition is a/an（）.A
low compressionB
air-bound fuel systemC
improper sparkD
change in viscosity
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