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 （）AactuationBsensitivityCcompensationDthrust shaft
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
actuation
B
sensitivity
C
compensation
D
thrust shaft
参考解析
解析：
暂无解析
相关考题：
Main engines as well as auxiliary engines operating on heavy fuel should have continuousoon the lubricating oil, either according tothebypass or batch principles A.filteringB.centrifugingC.depositingD.operating
Diesel engines driving alternators operating in parallel must maintain a set frequency regardless of load changes. The governor characteristic used to accomplish this is known as _______.A.actuationB.sensitivityC.compensationD.promptness
The load sharing characteristics of two diesel generators operating in parallel are mostly dependent on their governor ______.A.load limit settingsB.idle speed settingsC.speed limit settingsD.speed droop settings
All diesel engines are classified as ______．A.Four cycleB.Compression ignitionC.Vacuum ignitionD.External combustion
单选题A diesel engine is operating at 1800 RPM and driving a propeller at 600 RPMWhat is the speed reduction ratio?（）A030 to 1B300 to 1C333 to 1D330 to 1
单选题Compared to four-stroke/cycle engines, two-stroke/cycle diesel engines have the disadvantage of （）Aless even torqueBhigher cylinder head temperaturesCfewer power strokes per revolutionDgreater weight/size requirements
单选题With No~1 and No~2 alternators running in parallel and the KW loads equally shared, one alternator is drawing much higher current than the other.What does this indicate?（）AThe alternators are not generating the same voltages and should be adjusted on automatic voltage regulator rheostatsBAlternator frequencies are different and should be adjusted on the governor speed controllersCAlternators are out of phase and should be tripped and paralleled againDOne alternator has lost one of its phases
单选题The load between two steam-driven alternators operating in parallel may be adjusted by varying （）Athe speed of the alternatorsBthe field strength of the machinesCthe power factor of the alternatorsDsteam supply to the prime movers
单选题Scuffed cylinder liner wearing surfaces in a diesel engines can result from （）Achromium plating piston ringsBknurling the piston skirtCextended maximum power operationDapplying load to a cold diesel engine
单选题Diesel engines are considered safer than gasoline engines because（）.Athey are more heavily builtBthe fuel used is less volatileCthey can be easily reversedDthey operate at a lower speed
单选题（）, so they are widely used on board ship nowadays.ADiesel engines have more advantages in comparison with gasoline enginesBDiesel engines have more advantages in comparison to gasoline enginesCGasoline engines have more advantages in comparison with diesel enginesDGasoline engines have more advantages in comparison to diesel engines
单选题The cetane number rates fuels for diesel engines according to its （）Aantiknock characteristicsBignition qualitiesCrates of vaporizationDviscosity
单选题Main engines as well as auxiliary engines operating on heavy fuel should have continuous on the lubricating oil, either according to the bypass or batch principles（）AfilteringBcentrifugingCdepositingDoperating
单选题Engines, which are to be run in parallel have governors specially adapted for the same（）, about 4% to obtain basic load sharing.Aspeed settingsBspeed droopsCspeed dropsDspeed changes
单选题Exhaust pipes for separate diesel engines can be combined only when （）Aspace limitations prevent separately run pipesBthe engines are small auxiliary unitsCthey are arranged to prevent gas backflow to each engineDa waste heat boiler is installed
单选题The load sharing characteristics of two diesel generator operating in parallel are mostly dependent on their governor （）.Aload limit settingsBidle speed settingsCspeed limit settingsDspeed droop settings
单选题An individual injection pump is designed for variable beginning and constant ending of injectionFor diesel engines operating at constant speeds, the start of injection will（）Aadvance as the load increasesBretard as the load increaseCremain unchanged regardlessDalways occur at top dead center
单选题The separation of impurities and water from （） is essential for good combustion of diesel engines.Alube oilBfuel oilCturbine oilDgrease
单选题Some diesel engines are supercharged with a （）Aslam chargerBturbochargerCfuel atomizerDfuel injector
单选题An efficient seal between the cylinder block and cylinder heads on many diesel engines is obtained with（）Agraphite packingBsealing compoundClubricating oilDgaskets
单选题What causes diesel fuel to be ignited in the cylinder of an operating diesel engine?（）ASpark plugBHeat of compressionCCarburetorDGlow plug
单选题All diesel engines are classified as（）.Afour cycleBcompression ignitionCvacuum ignitionDexternal combustion
单选题The main operating characteristic of diesel engines which distinguishes them from other internal combustion engines is the （）Amethod of supplying airBcooling systemCmethod of igniting fuelDvalve operating mechanism
单选题To equalize the power factor of two alternators operating in parallel, the （）Afield excitation of both units is adjustedBgovernors of both units are adjustedCphase sequence is alteredDkilowatt load is evenly divided