单选题Water allowed to accumulate in the hydraulic system oil will cause an oxidation process producing by- products which are normally （）.Agums, acids, and varnishesBremoved by cellulose type filtersCneutralized by oil additivesDnot removed by absorbent filters
单选题
Water allowed to accumulate in the hydraulic system oil will cause an oxidation process producing by- products which are normally （）.
A
gums, acids, and varnishes
B
removed by cellulose type filters
C
neutralized by oil additives
D
not removed by absorbent filters
参考解析
解析：
暂无解析
相关考题：
One function provided by a hydraulic accumulator is to ___.A.provide an area where air can separate from the oilB.provide an area to separate solid contaminants from the oilC.act as an oil and water separatorD.absorb shocks occurring in the system
______continuously extract the crankcase atmosphere, via a pipe system, and move it past a sensitive and accurate opacity(不透明性) measuring track.A.The oil mist detectorsB.The smoke detectorsC.An oily water monitorD.Oil discharge monitoring and controlling system
Which of the following problems may be encountered by using an oil having a viscosity higher than that specified for an operating hydraulic system?A.External seal leakageB.Hunting due to fast responseC.Hydraulic oil film breakdownD.Increased power consumption
Which of the following can be used in hydraulic transmission system?A.Hydraulic oilB.Animal oilC.Light oilD.Fuel oil
When the steering gear is in operation, you should ______.A.check hydraulic oil levels every hourB.check the rams for overheatingC.check for excessive oil leakage from ramsD.drain water from tele-motor cylinders each watch
OIL-IN-WATER are ______．A.sediment of oil in waterB.oil dissolvents in waterC.solid oil aggregatesD.droplets of oil suspended in water
Are you testing the（）(液压舱盖)?A、hydraulic hatch coverB、hydraulic release unitC、hydraulic oil jackD、automatic hatch cover
单选题If the coolant temperature of a closed cooling water system for a diesel engine gradually increases, the trouble usually is （）Aa broken shaft on the freshwater pumpBan excessive accumulation of scale exchangerCan incorrect thermostatic element operating rangeDlube oil in the cooling water
单选题Lube oil accumulating in the cooling water system of a diesel engine will result in （）Alube cooler failureBpoor heat transferCmechanical lubricator failureDcamshaft seizure
单选题（）can be used to prevent hydraulic system overloaded or keep the pressure of oil outlet from pump constant.AOverflow valveBReducing valveCBalancing valveDReducing valve or balancing valve
单选题Purging air from a hydraulic system is necessary when（）Aadding small amounts of oil to the systemBthe system has been overheatedCthe system has been drained and then filled with new oilDthe system has been idle for a long period of time
单选题Overheating of a hydraulic system may be a result of （）.Achanging pump discharge pressure in response to normal load variationsBa high oil levelCincorrect fluid viscosityDcontinued slow re-circulation of the oil
单选题A reservoir, as used in hydraulic systems aboard ship, is used to store hydraulic oilAnother function is to（）Aact as a shock absorberBmaintain the stored oil under pressureCact as a base or foundation for the power unitDeliminate pressure surges in the system
单选题Which of the following can be used in hydraulic transmission system?（）AHydraulic oilBAnimal oilCLight oilDFuel oil
单选题One function provided by a hydraulic accumulator is to（）Aprovide an area where air can separate from the oilBprovide an area to separate solid contaminants from the oilCact as an oil and water separatorDabsorb shocks occurring in the system
单选题Moisture is removed from a refrigeration system by（）.Ableeding refrigerant from the condenserBopening a drain petcock on the oil separatorCcondensing the water in the heat exchangerDusing a dehydrator cartridge
单选题In which of the listed hydraulic systems will the installation of an oil cooler be necessary?（）AConstant tension mooring winch systemBHatch cover systemCWatertight door systemDInternal combustion engine hydraulic starter system
单选题Oil pressure in the lubrication system is（）than the static sea water head to ensure that sea water cannot enter the sterntube in the event of seal failure.AhigherBlowerCvery higherDvery lower
单选题Oil pressure in the lubrication system is （） the static sea water head to ensure that sea water （） the stem-tube.Alower than；can lubricateBlower than；can coolChigher than；can enterDhigher than ；cannot enter
单选题If we _____ the oil company to build this paper mill, we _____ water pollution now.Ahad not allowed, would not haveBhad not allowed, would not have hadCdidn’t allow, would not haveDdidn’t allow, would not have had
单选题When normal operating pressure is applied to the hydraulic oil used in a high-pressure system, the oil （）.Aviscosity will decreaseBvolume will increaseCvolume will decreaseDpour point will be reduced
单选题How can the chance of contaminating hydraulic fluid be decreased when working on hydraulic system?（）Aclean the fittings before they are disconnectedBPlace drip pans under leaky fittingsCSeal any cracks in lines with PermatexDCoat all threads with graphite oil
单选题The time of discharging oil is short, but oily water separator discharges oil frequentlyThe possible reason is （）Athe sensor of low oil level is fully covered by sludgeBthe coarse strainer before the pump in suction system is cloggedCthe screw pump is worn seriously and volumetric efficiency is decreasedDbilge suction value is clogged
单选题When the steering gear is in operation, you should （）.Acheck hydraulic oil levels every hourBcheck the rams for overheatingCcheck for excessive oil leakage from ramsDdrain water from telemotor cylinders each watch
单选题Lube oil in the fresh water cooling system of a diesel engine may result from a （）Acamshaft seizureBlube oil pump failureClube oil cooler failureDlube oil pump overflow
单选题An axial piston, variable stroke pump is used in a vessels hydraulic steering gearUnder pressure, oil continually leaks out from between the valve plate/cylinder barrel and will（）.Acause loss of hydraulic oil from the systemBresult in extreme damage to the pumpCcause damage to the pump ff not continually drained from the pump casingDresult in the system high side pressure to substantially drop off
单选题Which of the listed failures, occurring in an automated diesel generator system, should cause an audible alarm at the engine room control station?（）ALow cooling water outlet temperatureBHigh lube oil pressureCLow lube oil temperatureDLow starting air pressure