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单选题
In a disk-type lubricating oil purifier, （）
A
the purifier driving gears are lubricated by the reclaimed
B
oil as it leaves the bowl all dirt and sludge are automatically discharged with the cooling water
C
sealing water must never be supplied until after oil is fed to the unit
D
deterioration of the bowl ring gasket will cause the purifier to lose its water seal
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更多 “单选题In a disk-type lubricating oil purifier, （）A the purifier driving gears are lubricated by the reclaimedB oil as it leaves the bowl all dirt and sludge are automatically discharged with the cooling waterC sealing water must never be supplied until after oil is fed to the unitD deterioration of the bowl ring gasket will cause the purifier to lose its water seal” 相关考题
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In the following statements about the principle of the low level controlling, which is WRONG? 0
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Which of the following is NOT true about the centrifugal separator?
A.It can be applied to separate two liquidsB.It cannot separate solids which contaminated in the oil.C.It consists of purifier and clarifierD.The centrifuge arranged to separate two liquids is known as purifier
考题
If the bowl of a disk type centrifugal purifier when operated as a separator is not primed, theA.oil has a tendency to emulsify in the bowlB.purifier will act as a clarifier at the discharge ringC.oil will be lost through the water discharge portsD.oil solids will be deposited only at the intermediate top disk
考题
_______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
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tell us briefly about the working principles of the purifier ,the oil water seperator and air compressor .
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单选题The primary purpose of oil control rings on a diesel piston is to（）A
provide a reservoir for cylinder lubricationB
pump oil into the combustion space for cylinder coolingC
prevent excessive lubricating oil consumptionD
allow hydraulic oil film formation on the cylinder
考题
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high TBN valueB
low oil floc pointC
low oil demulsibilityD
low oil neutralization number
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clogged lube oil pipingB
excessive valve-guide clearanceC
high lube oil viscosityD
low lube oil temperature
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单选题The amount of lubricating oil in the drain tank should be checked by （）.A
measuringB
sounding rodC
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考题
单选题When fuel oil has seriously contaminated a diesel engine lubricating oil, you should （）.A
filter to remove the fuel oilB
use the settler to remove the fuel oilC
remove the fuel oil by centrifugingD
drain and then renew the lube oil supply
考题
单选题The size of the discharge ring used for the efficient operation of a disk type purifier is dependent upon the（）A
rated capacity of that purifierB
viscosity of the oil being purifiedC
maximum design speed of that purifierD
specific gravity of the oil being purified
考题
单选题In a disk-type lubricating oil purifier, （）A
the purifier driving gears are lubricated by the reclaimedB
oil as it leaves the bowl all dirt and sludge are automatically discharged with the cooling waterC
sealing water must never be supplied until after oil is fed to the unitD
deterioration of the bowl ring gasket will cause the purifier to lose its water seal
考题
单选题Two main lubricating oil pumps are usual and are obligatory in （）.A
container shipsB
bulk carriersC
passenger shipsD
barges
考题
单选题What is one effect of running a diesel engine at too cool a temperature? （）A
Buildup of sludge in the lubricating systemB
Excessive fuel consumptionC
Severe heat stresses on mechanical partsD
Foaming of the lubricating oil
考题
单选题A centrifugal fuel oil purifier should be shut down if （）A
more sealing water is neededB
the cover clamp needs tighteningC
the purifier has a bad vibration when startedD
water is discharged from the overflow line
考题
单选题Which of the following problems will occur if a disk-type centrifugal lube oil purifier is not properly primed prior to admitting oil flow to the bowl?（）A
Contamination of the lube oil by emulsification will resultB
The lube oil will not be subjected to the proper centrifugal forceC
The lube oil will overheat and flashD
Oil will discharge from the heavy phase discharge port and be wasted
考题
单选题Which of the following influences the position of the interface between the liquid seal and the oil in a purifier?（）A
Height of the machineB
Temperature of the liquid sealC
Gravity discD
Bowl diameter
考题
单选题The （）should be kept running for about half an hour after FWE.A
crankcase lubricating oil pumpB
fuel oil pumpC
air compressorD
auxiliary blower
考题
单选题Which of the substances listed is satisfactorily removed from the fuel by a centrifugal oil purifier?（）A
Carbon particlesB
Lube oilC
GasolineD
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考题
单选题Engine coolant accumulating in the diesel engine lubricating oil can result from a （）A
low oil pressureB
high coolant pressureC
leaking fuel injectorD
cracked cylinder head or liner
考题
单选题In a normally operating diesel engine, the main cause of lubricating oil contamination in the crankcase is a result of the （）.A
metal particles loosened by wearB
air when no air cleaners are usedC
condensation of water vaporsD
breakdown of the lubricating oil by dilution
考题
单选题（） providing lubricating films, oil used in marine diesel engines have to remove heat from oil cooled piston.A
Except forB
BesideC
ExceptD
In addition to
考题
单选题The function of lubricating oil is to （）A
maintain even distribution of bearing wearB
maintain a constant oil temperatureC
maintain a pressurized film between moving surfacesD
remove entrained water
考题
单选题Lubricating oil viscosity in an operating diesel engine can be reduced by（）A
increasing cooling water flowB
increasing lube oil flowC
dilution by fuel oilD
adding SAE 70 oil
考题
单选题Which of the substances listed is satisfactorily removed from the fuel by a centrifugal oil purifier?（）A
ImpuritiesB
Lube oilC
GasolineD
Diesel fuel
考题
单选题Lubricating oil systems for diesel engine journal bearings are usually lubricated by which of the following types of lubricating oil systems?（）A
SplashB
GravityC
PressureD
Bypass
考题
单选题Before the sludge in a purifier is ejected,（）A
the oil feeding is stopped and replaced by admitting flushing waterB
the flushing water feeding is stopped and replaced by admitting oilC
the feeding of dirty oil and flushing water is stoppedD
the feeding of dirty oil and flushing water is admitted
考题
单选题The （）pump is usually used as the lubricating oil pump.A
turbineB
screwC
vaneejectorD
centrifugal
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