单选题（）uses one or two high pressure pumps for all the cylinders with one more standby, while（）have a separate high-pressure pump for each cylinder.AA common rail engine；conventional enginesBA conventional engine；common rail enginesCA marine diesel engine；most other enginesDA two-stroke engine；four-stroke engines
单选题
（）uses one or two high pressure pumps for all the cylinders with one more standby, while（）have a separate high-pressure pump for each cylinder.
A
A common rail engine；conventional engines
B
A conventional engine；common rail engines
C
A marine diesel engine；most other engines
D
A two-stroke engine；four-stroke engines
参考解析
解析：
暂无解析
相关考题：
Of the following, which one is not a term of Marine Weather Bulletin?______.A.Complex lowB.DepressionC.High pressureD.Ambient pressure
With reference to a two-ram actuating mechanism, which one of the following statement is FALSE?A.The rams work inside cylinders.B.The cylinders have glands sealing their open ends.C.The rams are connected to a cross-headD.The cross-head is mounted on the rudder stock
If a heavy sea strikes the rudder, the shock is transmitted through ___ to the rams, this cause a sudden increase in oil pressure in one of the cylinders.A.the control rodB.the hunting gearC.the floating ringD.the tiller arm
The fire pumps must be capable of delivering a total quantity of water at a defined head, not less than _____ of the total bilge pumping capacity.A.one-thirdB.two-thirdsC.one-fourthD.two-fourths
A fire pump may be used for other purposes if ______.A.the other services are run off a reducing station with a pressure gageB.one of the required pumps is kept available for use on the fire main system at all timesC.no relief valves are installedD.all of the above conditions are met
In which voyage，between two points，is the rhumb line distance NOT approximately the same as the great circle distance?_____.A.The two points are in low latitudes in the same hemisphereB.The two points are in high latitudes in the same hemisphereC.The two points are near the equator，but in different hemispheresD.One point is near the equator，one point is in a high latitude，and both are near the 180th meridian
Mean high water is the average height of ______.A.the higher high watersB.the lower high watersC.the lower of the two daily tidesD.all high waters
Which two of the following are valid characteristics of EIGRP?（）A、Has a maximum hop count of 25B、Can differentiate between internal and external routesC、Uses a 32-bit metricD、Can maintain only one routing tableE、Need all networks to use the same subnet maskF、Supports only one routed protocol
When scaling Coherence from one to two cache servers， it will not show the same scalability as two to four. Why？（）A、 Coherence uses a more efficient TCMP algorithm going from two to four cache serversB、 When going from one to two cache servers， object backups are copied across servers so work is doubled，but going from two to four is a fixed amount of workC、 Near cache is enabled with a larger quorum thus performance is improvedD、 all of the above
单选题When scaling Coherence from one to two cache servers， it will not show the same scalability as two to four. Why？（）A Coherence uses a more efficient TCMP algorithm going from two to four cache serversB When going from one to two cache servers， object backups are copied across servers so work is doubled，but going from two to four is a fixed amount of workC Near cache is enabled with a larger quorum thus performance is improvedD all of the above
单选题Two well-developed high pressure areas may be separated by a（）.AHill of low pressureBTrough of low pressureCValley of low pressureDRidge of low pressure
单选题Which of the following statements represents the advantage of rotary pumps as compared to reciprocating pumps?（）AThe high discharge pressure of the rotary pumps permits a larger volume of fluid per unit time than the reciprocating pumpBRotary pumps are capable of pumping more fluid than reciprocating pumps of the same weightCRotary pumps occupy only one-half the space of reciprocating pumpsDRotary pumps eliminate discharge slippage of the pumped liquid, while this does not hold true for a reciprocating pump
单选题Exhaust temperature increases in all cylinders, the possible cause may be（） (1) increased scavenging air temperature (2) air in fuel pumps and fuel valves (3) fouling of air and gas passagesA(1)+(2)B(1)+(3)C(2)+(3)D(1)+(2)+(3)
单选题The engine will fail to start unless （）.Athe pressure of the starting air is high enoughBthere is enough air in the air reservoirsCthe air is supplied into the cylinders in the appropriate sequenceDall of the above
单选题"Scavenging" on a diesel engine means （）.Ainjecting fuel oil into a cylinderBremoving exhaust gases from the cylinderCforcing air into the cylinders under pressure after the exhaust valve has dosedDa combination of all the above
单选题The engine has one or two group of fuel pumps, depending upon （）.Athe number of fuel valvesBthe number of cylindersCthe speed of engineDthe power of engine
单选题If a heavy sea strikes the rudder, the shock is transmitted through （） to the rams, this cause a sudden increase in oil pressure in one of the cylinders.Athe control rodBthe hunting gearCthe floating ringDthe tiller arm
单选题Large, two-stroke/cycle, main propulsion, diesel engine cylinders can be successfully pressure charged during normal operation, by using the （）.Aexhaust gas temperature systemBexhaust load systemCconstant or pulse pressure systemDconstant volume system
单选题Pumps and fine filters are arranged （） with one as standby.Ain duplicateBin doubleCat twiceDfor two
单选题An un-loader is installed on an air compressor to （）.Abypass the high pressure stage to the low pressure stage on 100% of the air compressors in serviceBprevent excessive inter-stage pressure buildupCcontrol compressor discharge pressureDremove all but the frictional load during starting
单选题One remedy for a high firing pressure, in addition to a high exhaust temperature in one cylinder of a diesel engine, is to （）Aincrease scavenge air pressureBreduce fuel booster pump pressureCadjust the fuel rackDretard fuel injector timing
单选题Centrifugal pumps can be designed with a number of impellers （） to attain a high final delivery pressure.Ain seriesBin parallelCeither A or BDNone of the above is tree
单选题In which scenario will you create a sorted hash cluster？ （）A if the application uses queries joining tables only occasionallyB if the full table scan is executed often on only one table of the clustered tablesC if the data for all the rows of a cluster key value exceeds one or two Oracle blocksD when you want the data to be returned automatically in the chronological order
单选题Which of the following pumps is used where a relatively high pressure and small capacity are required?（）AVolute pumpBDiffuser pumpCRegenerative pumpDAll of the above
单选题（）uses one or two high pressure pumps for all the cylinders with one more standby, while（）have a separate high-pressure pump for each cylinder.AA common rail engine；conventional enginesBA conventional engine；common rail enginesCA marine diesel engine；most other enginesDA two-stroke engine；four-stroke engines
单选题Fuels of high quality with their earlier ignitions will cause higher （）pressure in cylinders of a diesel engine.AcompressionBmaximumCratedDoil
单选题A common rail engine has only one or two high pressure pumps in operation at the same（）time, and the injection into each cylinder.Acan’t be controlled very preciselyBcan’t be controlled as flexibly as the separate pump systemCcan be controlled as flexibly as the separate pump systemDcan be controlled more precisely and flexibly
单选题When one cylinder has a lower compression pressure and higher exhaust gas temperature than any of the other engine cylinders, which of the conditions listed will indicated?（）AAdvanced ignitionBClogged air intakeCLeaky exhaust valveDHigh exhaust pressure