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单选题
If the analysis of used lube oil indicates a high content of iron particles, this could indicate（）
A
corrosive deterioration of a bearing
B
inadequate air filtration
C
excessive ring and liner wear
D
excessive cooling of lubricating oil
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199 During extremely cold weather, while starting an engine,it turns too slowly and fails to start.This problem is most likely theresult of()
A.high fuel oil viscosityB.low fuel oil temperatureC.high lube oil viscosityD.energized alow plugs
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Oil oxidation as a result of excessively high lube oil temperature, is harmful to a diesel engine BecauseA.oil foaming will always occurB.large quantities of oil are consumedC.lube oil viscosity is always decreasedD.corrosive by-products are usually formed
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If a used lube oil analysis indicates excessive chromate content, this meansA.air filtration is inadequateB.engine coolant is leaking into the lube oilC.fuel oil is leaking into the lube oilD.the piston rings are excessive worn
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In an auxiliary diesel engine bypass type lubricating oil system, the main lube oil pump forces_______ .A.all of the oil used by the engine through a filterB.some of the oil used by the engine through a filterC.some of the oil used by the engine through a centrifugeD.all of the oil used by the engine through a centrifuge
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单选题A decrease in the flash point of diesel engine lube oil indicates the lube oil has become （）.A
contaminated with sludgeB
contaminated with carbonC
diluted with fuel oilD
diluted with water
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单选题Black smoke exhausting from a diesel engine indicates（）A
proper fuel injectionB
water in the fuelC
incomplete combustionD
burning of lube oil
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单选题In context, which of the following is the best version of the underlined portion of sentence 3 (reproduced below)?In those days we used to eat many black olives before they got the high fat content bad name.A
(As it is now)B
In those days, before having found the high fat content in black olives, we used to eat many of them.C
Before black olives were considered unhealthy due to high fat content, we ate lots of them.D
Until black olives had a high fat content we used to eat many of them.E
Black olives were consumed in high numbers before the high fat content bad name was given.
考题
单选题The pressure difference before and after the lube oil filter indicates （）the filter should be cleaned.A
whenB
howC
whereD
whether
考题
单选题A lube oil filter can be used to remove most contaminants from lube oilA contaminant which will remain in the lube oil after filtering is （）.A
acidB
fuel oilC
sedimentD
water
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单选题Why is gas-freeing rarely required for LPG cargo tanks? （）A
LPG is compatible with all cargosB
LPG's high oxygen content makes it nonvolatileC
Cargo tanks are inspected less frequently than on oil tankersD
The cargo tanks are used for one type of cargo only
考题
单选题If the cooling water temperature and the lube oil temperature in a diesel engine are too high, the cause can be （）A
a dirty lube oil strainerB
internal water leaksC
an oil suction line restrictionD
excessive wears of the cooling water pump
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单选题The purpose of an oil mist detector in a main propulsion diesel engine is to warn of （）A
excessive mist density in the crankcasesB
excessively high crankcase vacuumC
excessively high bearing temperatureD
excessive carbon buildup in the lube oil
考题
单选题Which of the listed conditions can cause lacquer to be deposited on a piston skirt?（）A
High sulphur content fuelB
High lube oil temperaturesC
High vanadium content fuelD
Excessive piston slap
考题
单选题Lube oil filters remove contaminants more efficiently if the oil being filtered is （）.A
under high pressureB
under low pressureC
heated to reduce viscosityD
cooled to increase viscosity
考题
单选题Which of the following conditions indicates the dilution of diesel engine lube oil by fuel oil?（）A
Water discharging from the water outlet of the lube oil purifierB
Fuel oil discharging from the water outlet of the lube oil purifierC
Lube oil discharging from the water outlet of the lube oil purifierD
A change in the lube oil viscosity
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单选题Cylinder oil is a high viscosity mineral oil, with a （） machined to the anticipated sulfur content of the fuel.A
TANB
TBNC
SAND
SBN
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单选题When fuel oil is accidentally missed with lube oil which of the following processes can be used to separate them?（） Ⅰ.filtering Ⅱ.settlingA
Ⅰ onlyB
Ⅱ onlyC
either Ⅰ or ⅡD
neither Ⅰ or Ⅱ
考题
单选题As to the piston cooling, of the following, which statement is not true?（）A
Because the piston is exposed to very high temperature, it must be cooledB
The lower the piston cooling temperature is, the better it isC
Both water and lube oil can be used as coolantD
One of the piston cooling methods is vibration cooling, with better effect
考题
单选题The lube oil pump used in a diesel engine is a （）.A
volute pumpB
centrifugal pumpC
diaphragm pumpD
gear pump
考题
单选题A condition that can increase the foaming tendency of lube oil is （）A
excessively high oil temperaturesB
water or moisture contaminationC
fuel dilutionD
life its cylinder relief vales
考题
单选题The tailshaft sealing arrangement found a little lube oil leaky and caused a lot of seawater into the bearing, the step should be taken as a makeshift is（）A
dropping lube oil for lubrication, reducing the pollution to the seaB
setting a temporary gravity oil tank and enhanced the position properlyC
lubricating with the used lube oilD
lubricating with the fresh water and navigation in a lower speed
考题
单选题If a used lube oil analysis indicates an excessive chromate content, this means （）A
air filtration is inadequateB
engine coolant leaking into the lube oilC
fuel oil is leaking into the lube oilD
the piston rings are excessively worn
考题
单选题If a used lube oil analysis indicates excessive fuel dilution, the lube oil should be （）A
changedB
centrifugedC
filteredD
settled
考题
单选题Which of the following operational conditions will occur to the diesel engine lube oil at extremely high temperature?（）A
The oil oxidizes and forms carbon depositsB
The viscosity increasesC
Engine oil consumption decreasesD
Lubricating qualities of the oil are enhanced
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单选题If the chemical analysis of a lube oil sample taken from a diesel engine indicates an increased neutralization number, the （）.A
acidity has increasedB
viscosity has decreasedC
demulsibility has improvedD
foaming is guaranteed to occur
考题
单选题High lube oil temperatures developing in a diesel engine can result from（）A
high oil pressureB
excessive bearing end playC
plugged oil control ringsD
engine overload
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单选题Which of the following problems may occur when using fuel oil with a high sulphur content?（）A
Injection lagB
Lube oil dilutionC
Pre-ignitionD
Corrosion
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