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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 sea
B
setting a temporary gravity oil tank and enhanced the position properly
C
lubricating with the used lube oil
D
lubricating with the fresh water and navigation in a lower speed
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更多 “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” 相关考题
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The bearing of tailshaft sealing equipment which adopts the oil nature circulation is hot, the reason isA.the rotate speed fluctuationB.the ventilation tube cloggedC.the main engine accelerate so fastD.stormy waves
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Sludge may be formed in the oil in the crankcase of a reciprocating air conditioning compressor as a result of ______.A.refrigerant bubbles in the lube oilB.refrigerant reducing the lube oil viscosityC.oxidation(氧化) of the lube oil from overheatingD.reducing the floc or cloud point of the oil
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单选题A dirty lube oil strainer can result in（）A
crankcaseB
low lube oil temperatureC
excessive oil consumptionD
low bearing oil pressure
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单选题Telescopic pipes to the piston of a large slow-speed main propulsion diesel engine are designed to prevent （）.A
excessive crankcase pressureB
excessive lube oil temperatureC
contamination of the lube oil by waterD
contamination of the cooling water by lube oil
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单选题To determine if the lube oil filter elements need changing, （）.A
open the filter and inspect the elementsB
check the lube oil pump discharge pressureC
check the lube oil header pressureD
check the pressure drop across the filter
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单选题The lube oil cooler is located after the lube oil filter in order for （）A
the filter to operate more efficientlyB
the lube oil cooler to be bypassedC
positive lube oil pump suction to be assuredD
galvanic action in the cooler to be minimized
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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
考题
单选题Excessive lubricating oil consumption in a running diesel engine can be caused by （）A
clogged lube oil pipingB
excessive valve-guide clearanceC
high lube oil viscosityD
low lube oil temperature
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单选题In a bypass type lubrication system for a diesel engine, the dirty oil line to the centrifuge should be taken from the （）.A
lube oil pump suction lineB
lube oil pump discharge lineC
bottom of the lube oil sumpD
outlet from the lube oil header
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单选题Fuel oil contamination of an auxiliary diesel engine lube oil can result in（）A
an increased flash pointB
higher lube oil pressuresC
an increased viscosityD
lower lube oil pressures
考题
单选题The bearing of tailshaft sealing equipment, which adopting the oil nature circulation is hot, the reason is（）A
the rotate speed fluctuationB
the ventilation tube cloggedC
the main engine accelerate so fastD
stormy waves
考题
单选题The main advantage of improved Simplex tailshaft seal are（）A
the good sealing performance and the simple structureB
the good sealing performance and the short life expectancyC
the good sealing performance but the short life expectancyD
the good sealing performance and the lower cost
考题
单选题It is necessary for us （） after having served for a certain period.A
to change the lube oilB
have the lube oil purifiedC
have the lube oil burntD
to analyze the lube oil
考题
单选题Which of the following conditions can cause excessive lube oil consumption in a diesel engine?（）A
Low lube oil temperatureB
Dirty lube oil strainerC
Low lube oil pressureD
High lube oil temperature
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
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Demulsibility of a lube oil is defined as （）.A
the ability of oil to separate from waterB
the temperature at which oil flows rapidlyC
a measure of the water in a lube oil systemD
an emulsion of different grades of oil
考题
单选题Setting a sealing equipment astern on the tailshaft can’t （）A
prevent the seawater from intergratingB
prevent the lube oil from running out of the outside aboardC
strengthen the intencity of the sterntubeD
prevent the mud and sand from entering the lube oil system
考题
单选题Scale and dirt accumulation in the waterside of a lube oil cooler will be indicated by a gradual increase in the lube oil（）.A
TBN numberB
viscosityC
temperatureD
foaming
考题
单选题Sludge may form in the lubricating oil crankcase of a reciprocating air conditioning compressor as a result of （）.A
wax precipitation in the lube oilB
contamination by dust, scale, or moistureC
refrigerant bubbles in the lube oilD
refrigerant reducing the lube oil viscosity
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Excessive piston ring wear in a diesel engine will cause（）A
high lube oil viscosityB
increased lube oil consumptionC
low lube oil temperaturesD
high firing pressures
考题
单选题Sludge may be formed in the oil in the crankcase of a reciprocating air conditioning compressor as a result of （）A
refrigerant bubbles in the lube oilB
refrigerant reducing the lube oil viscosityC
oxidation of the lube oil from overheatingD
reducing the floc or cloud point of the oil
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