单选题If the temperature drops low enough, oil will not flow, () just tell us the temperature.AHash pointBViscosityCPour pointDCetane number

单选题
If the temperature drops low enough, oil will not flow, () just tell us the temperature.
A

Hash point

B

Viscosity

C

Pour point

D

Cetane number


参考解析

解析: 暂无解析

相关考题:

A few ( )will be enough for the machine. A、drops of oilsB、drops of oilC、drop of oilsD、drop of oil

As water gets colder, its temperature drops lower and lower, until it begins to freeze.

_______can cause oil flow from water outlet of the oil purifier.A.Oil inlet valve opening too quicklyB.Oil temperature little higher than normalC.Diameter of gravity disc too smallD.Viscosity of oil little lower than normal

A high rate of separation between oil and water is favored by ______.A.large size of oil globule(小球)B.low temperatureC.high viscosityD.high flow rate

After a cold front passes,the barometric pressure______.A.drops,and the temperature dropsB.drops , and the temperature risesC.rises,and the temperature dropsD.rises,and the temperature rises

单选题The purpose of a temperature sensing device installed in the stack of a small automatically fired auxiliary steam boiler is to secure the oil burner()Ain the event of a flame failureBin the event of a stack fireCwhen the water level reach the crown sheetDwhen the feed pump discharge pressure drops to a preset minimum

单选题In modern installations, the main engine and the standby auxiliary engines()Acan be started at low temperature and are free from preheatingBusually are preheated by steam before being startedCare kept at a constant temperature and free from preheatingDare kept at a low temperature to save energy

单选题An over-speed trip stops a diesel engine when the engine ()Aruns out of fuelBhas low lubricating oil pressureCexceeds a set maximum speedDhas high cooling water temperature

单选题Early injection timing is indicated by ().Ahigh exhaust temperature and low firing pressureBhigh exhaust temperature and high firing pressureClow exhaust temperature and low firing pressureDlow exhaust temperature and high firing pressure

单选题Whether using a centrifuge or a simple filter, oil cleaning and filtration will be the most effective when the oil is at a ().Ahigh temperature and a high viscosityBhigh temperature and a low viscosityClow temperature and a high viscosityDlow temperature and a low viscosity

单选题If the cooling water temperature and the lube oil temperature in a diesel engine are too high, the cause can be ()Aa dirty lube oil strainerBinternal water leaksCan oil suction line restrictionDexcessive wears of the cooling water pump

单选题A smoking burner with a pulsating flame in auxiliary boiler, is an indication that the()Afuel oil supply temperature is normalBburner electrode is incorrectly positionedCfuel/air ratio is incorrectDignition current is too low

单选题()can cause oil flow from water outlet of a separator.AOil inlet valve opening too quicklyBOil temperature too highCDiameter of gravity disc too smallDViscosity of oil too low

单选题In order to start a large, low-speed, main propulsion diesel engine on high viscosity fuel after an extended shutdown, the ()Afuel must be preheatedBintake air should be preheatedClube oil outlet temperature should be increased 20℃ above normalDnone of the above

单选题If found oil when we open low oil level plug of separator, it indicates ()Athe separator is overloadBthe monitor equipment of separator failsCthe discharge pump of separator can not workDthe temperature of oil water is low

单选题()can not cause oil flow from water outlet of self-cleaning separator.AOil temperature too highBDiameter of gravity disc too largeCOil temperature too lowDHigh level tank out of water

单选题After an engine is started you should().Aincrease engine speed to insure adequate flow of oil to all parts of the engineBpay no attention unless there are unusual noises from the engineCcheck operating pressures and temperatures,and check for leaksDrun the engine at idle until the temperature has increased

单选题Demulsibility of a lube oil is defined as ().Athe ability of oil to separate from waterBthe temperature at which oil flows rapidlyCa measure of the water in a lube oil systemDan emulsion of different grades of oil

单选题Which of the following statements is true concerning an oil cooler?()AThe oil temperature is less than the cooling water temperatureBThe oil pressure is less than the cooling water pressureCThe oil pressure is greater than the cooling water pressureDThe oil flow control valve is always installed in the oil input line

单选题One result of operating a diesel engine at light load with excessively low cooling water temperature is a/an ()Adecrease in ignition lagBincrease in fuel economyCreduction in lube oil viscosityDincrease in cylinder misfiring

单选题Oily water separator mis-alarms, the most possible reason is ()Aseparating oil too fastBthe sensor flushed badlyCthe discharge solenoid value out of orderDtoo low heating temperature

单选题If it becomes necessary to cutout an individual cylinder of a large, low-speed, main propulsion diesel engine, the fuel to that cylinder should be secured and its ()Afuel pump should be removed and all connections blanked offBcylinder oil feed rate should be increased slightly above that used at normal sea speedCcylinder oil feed rate should be reducedDcylinder oil feed rate should be increased to the maximum flow capable of the metering pump

单选题Compensated flow control or constant flow valves are used in hydraulic systems to()Acompensate for major leaks in the systemBmaintain the original fluid viscosityCallow for changes in pressure and temperature within the systemDassure constant fluid temperature

单选题When bilge water is heated in a holding tank, which one of the following statements is not accurate?()AThe high temperature facilitates primary gravity separationBMost of the oil and organic solvents are raised to the top layerCThe high the temperature is, the more the top oil will be collectedDThe high temperature has little use on the separation of emulsified oil

单选题Which of the following conditions will develop if the flow of ‘raw’ cooling water to diesel engine is obstructed?()AAir will enter the cooling systemBCarbon will plug the water cooled exhaust manifoldsCThe jacket water temperature will riseDThe lube oil viscosity will increase

单选题Most large, low-speed, main propulsion diesel engines use duplex lube oil strainer to ()Adecrease the time required between cleaningsBremoves all large and small foreign objectsCensure a positive flow of oil at all timesDensure that all lube oil has been treated twice

单选题Which of the following conditions may need to be reduced when operating a large, low speed, main propulsion, diesel engine at low loads?()AInjection pressuresBControl air supply pressureCCooling water flow through after-coolersDLube oil temperature