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单选题
In a simple mechanical governor, the （）
A
centrifugal force rotates the ball-head
B
flyweight centrifugal force is balanced by spring force
C
flyweight centrifugal force is balanced by hydraulic pressure
D
speeder spring alone actuates the fuel control rod
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考题
MEMS的英文名称是()
A.MECHANICAL-ELECTRO-MICROSYSTEMSB.MICRO-ELECTRO-MECHANICALSYSTEMSC.MICRO-MECHANICAL-ELECTROSYSTEMSD.ELECTRO-MICRO-MECHANICALSYSTEMS
考题
grammar practice is usually divided into two categories, _______________.
A. meaningful drilling and communicative drillingB. mechanical drilling and meaningful drillingC. mechanical practice and meaningful practiceD. meaningful practice and communicative practice
考题
Several unpopular decisions ____ the governor's popularity.
A、decayedB、diminishedC、distortedD、dissolved
考题
grammar pratice is usually dividied into two categories:_________________.
A、mechanical drilling and meaningful drillingB、mechanical practice and meaningful practiceC、meaningful drilling and communcative drillingD、meaningful practice and communicative practice
考题
If the compensating needle valve of a hydraulic governor is opened more than necessary the governor will .A.have a larger than normal dead bandB.produce excessive speed response to a load changeC.respond slowly to any change in engine loadD.stabilize engine speed at the new governor setting
考题
For most diesel propulsion and generator engines, the over-speed trip device will stop the engine byA.moving the governor control to stopB.shutting off the lubricating oil supplyC.tripping the governor emergency stop leverD.shutting off the fuel supply
考题
A large change in ambient temperature, or using an oil of a viscosity different than the one recommended by the manufacturer in a mechanical hydraulic governor, will result in the need to adjust theA.pilot valve openingB.compensating needle valveC.compensating spring tensionD.accumulator spring tension
考题
The major cause of trouble in a mechanical-hydraulic governor is contamination of the hydraulic fluid by ______.A.dirtB.fuel oilC.governor cooling waterD.fuel oil tar(焦油)
考题
MEMS的英文名称是（）A、MECHANICAL-ELECTRO-MICROSYSTEMSB、MICRO-ELECTRO-MECHANICALSYSTEMSC、MICRO-MECHANICAL-ELECTROSYSTEMSD、ELECTRO-MICRO-MECHANICALSYSTEMS
考题
单选题If the compensating needle valve of a hydraulic governor is opened more than necessary the governor will （）A
have a larger than normal dead bandB
produce excessive speed response to a load changeC
respond slowly to any change in engine loadD
stabilize engine speed at the new governor setting
考题
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
考题
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
shutting off the lubricating oil supplyC
tripping the governor emergency stop leverD
shutting off the fuel supply
考题
单选题A large change in ambient temperature, or using an oil of a viscosity different from the one recommended by the manufacturer in a mechanical hydraulic governor, will result in the need to adjust the （）.A
pilot valve openingB
compensating needle valveC
compensating spring tensionD
accumulator spring tension
考题
单选题The most common contaminate of governor hydraulic fluid is （）.A
moistureB
dirtC
acidD
air
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 major cause of trouble in a mechanical-hydraulic governor is contamination of the hydraulic fluid by （）A
dirtB
fuel oilC
governor cooling waterD
fuel oil tars
考题
单选题（） are commonly used in mechanical-hydraulic governor（调速器） to sense engine speeds.A
BulbsB
BulksC
FlyweightsD
Flywheels
考题
单选题The load limitation of governor should be reduced when ship navigating at sea, the main reason is to（）A
prevent the diesel engine surgingB
prevent governor from being damaged because of swingC
reduce the probability of the crank shaft being torsional vibrated and resonatedD
prevent the main engine being overload or overspeed
考题
单选题Which of the items listed causes a direct acting mechanical governor to operate the engine fuel control linkage?（）A
Hydraulic oil pressureB
Servomotor actionC
Flyweight centrifugal forceD
Relay motion
考题
单选题If two AC generators are to be operated in parallel, the load is distributed evenly by（）A
means of rheostat the governor settingsB
a balance coil excitationC
adjusting the governor settingsD
changing excitation
考题
单选题Friction developing between the moving parts of a governor, governor linkage and control valve will cause the governor to （）.A
react with insufficient speed droopB
fail to react to small speed changesC
have excessive sensitivity to small speed changesD
remain in the neutral position
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If two A.C.generators are to be operated in parallel, the load is distributed evenly by（）A
means of rheostat the governor settingsB
a balance coil excitationC
adjusting the governor settingsD
changing excitation
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