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单选题
On most diesel engines, the governor controls the output speed by （）.
A
controlling the amount of fuel injected into the cylinders
B
varying the speed of the turbocharger
C
adjusting the compression ratio
D
changing the timing of the fuel injection camshaft
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单选题The purpose of the compensating adjustment used in a diesel engine hydraulic governor is to （）A
compensate for low oil levelB
increase governor promptnessC
prevent governor huntingD
limit engine load
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单选题For most diesel propulsion and generator engines, the over-speed trip device will stop the engine by （）A
moving the governor control to stopB
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tripping the governor emergency stop leverD
shutting off the fuel supply
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单选题On most modern diesel engines, the main and connecting rod bearings receive their lubricating oil by （）.A
banjo feedB
splash feedC
gravity feedD
pressure feed
考题
单选题The most common contaminate of governor hydraulic fluid is （）.A
moistureB
dirtC
acidD
air
考题
单选题Scuffed cylinder liner wearing surfaces in a diesel engines can result from （）A
chromium plating piston ringsB
knurling the piston skirtC
extended maximum power operationD
applying load to a cold diesel engine
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单选题The main function of tie rods in the construction of large, low speed diesel engines is to（）.A
stiffen the bedplate in way of the main bearings to increase the engines longitudinal strengthB
accept most of the tensile loading that results from the firing forces developed during operationC
mount the engine frame securely to the hull to prevent shaft coupling misalignmentD
connect the crosshead solidly to the piston rod
考题
单选题Diesel engines are considered safer than gasoline engines because（）.A
they are more heavily builtB
the fuel used is less volatileC
they can be easily reversedD
they operate at a lower speed
考题
单选题（）, so they are widely used on board ship nowadays.A
Diesel engines have more advantages in comparison with gasoline enginesB
Diesel engines have more advantages in comparison to gasoline enginesC
Gasoline engines have more advantages in comparison with diesel enginesD
Gasoline engines have more advantages in comparison to diesel engines
考题
单选题To correct a hunting problem in a main propulsion diesel engine hydraulic governor, you should （）.A
increase the governor oil pressureB
adjust the speed droop settingC
adjust the speeder spring travelD
adjust the compensating needle valve
考题
单选题The viscosity regulator controls （） in order to provide oil at the correct viscosity for combustion.A
the engines speedB
the engines loadC
the fuel oil temperatureD
the fuel oil flow
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单选题Diesel engines driving alternators operating in parallel must maintain set frequency regardless of load changesThe governor characteristic used to accomplish this is known as （）A
actuationB
sensitivityC
compensationD
thrust shaft
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单选题Defective governor in a diesel engine may lead to （）.A
smoky exhaustB
starting failureC
ignition relayD
over speed
考题
单选题A governor automatically controls engine speed by regulating （）.A
fuel supplyB
firing orderC
engine loadD
oil level
考题
单选题The cetane number rates fuels for diesel engines according to its （）A
antiknock characteristicsB
ignition qualitiesC
rates of vaporizationD
viscosity
考题
单选题Which of the listed governor characteristics will greatly affect the load sharing relationship between paralleled diesel generators?（）A
SensitivityB
PowerC
Speed droopD
Compensation
考题
单选题Some diesel engines are supercharged with a （）A
slam chargerB
turbochargerC
fuel atomizerD
fuel injector
考题
单选题（） the engines, the diesel engine is（） used engine on board.A
Between；more commonlyB
Among；the most commonlyC
Between；not more commonlyD
Among；not the most commonly
考题
单选题Some medium and high-speed diesel engines require reduction gear units to provide a useful propeller speedIn most reduction gears, the bull gear（）A
must churn the oil in the sumpB
is connected to the propeller shaftC
is driven at the highest RPMD
compensates for alignment variations between the engine and pinion gear
考题
单选题Prior to starting most medium-speed propulsion diesel engines, which of the procedures listed should be observed?（）A
The expansion tank should be topped offB
The thermostatic water regulating valves should be manually openedC
The fuel filters should be changedD
The engine should be turned over slowly with the indicator cocks open
考题
单选题All diesel engines are classified as（）.A
four cycleB
compression ignitionC
vacuum ignitionD
external combustion
考题
单选题The direct acting mechanical governor used with some small diesel engines, controls fuel flow to the engine by（）A
governor flyweight action on a pilot valve which controls fuel injectionB
governor flyweight motion acting on fuel controls through suitable linkageC
positioning a butterfly valve in the fuel delivery system positioningD
a servomotor piston attached to the fuel controls
考题
单选题The main operating characteristic of diesel engines which distinguishes them from other internal combustion engines is the （）A
method of supplying airB
cooling systemC
method of igniting fuelD
valve operating mechanism
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