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单选题
To ensure oil purifier working in normal condition,the interval between two sludge discharging should not exceed（） hours.
A
2
B
4
C
5
D
6
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One of the reasons that causes oil flowed from sludge outlet of a self-cleaning purifier isA.seal water supply be cut offB.make-up water supply be cut offC.oil outlet valve closed or not open sufficientlyD.the flow rate of oil is too much
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单选题Improperly fitted piston rings in a diesel engine can cause（）A
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lower than normal lube oil temperatureC
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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
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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
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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
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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
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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
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Gravity discD
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excessively high oil temperaturesB
water or moisture contaminationC
fuel dilutionD
life its cylinder relief vales
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Carbon particlesB
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单选题To ensure oil purifier working in normal condition,the interval between two sludge discharging should not exceed（） hours.A
2B
4C
5D
6
考题
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both as clarifiersB
first one as clarifiers, second one as purifierC
both as purifiersD
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operation within the explosive rang of the fuelC
excessive purifier operating pressuresD
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单选题As for an oil-fired boiler if at a normal steaming condition and water goes out of sight in gauge glasses the action you should take is: （） (1) secure oil to fires (2) increase feed pump pressureA
（1）B
（1）and（2）C
（2）D
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考题
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tookB
takeC
takingD
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考题
单选题In a purifier, the interface between the liquid seal and the oil should be positioned as close as possible to （）.A
the outlet of oilB
the outlet of waterC
the bowl peripheryD
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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When accepting vehicles for shipment，the Master should ensure that（）.A
all decks intended for the stowage of vehicles are，in so far as is practicable，free from oil and greaseB
the ship has on board an adequate supply of cargo securing gear，which is maintained in sound working conditionC
vehicles are in apparent good order and condition suitable for sea transport，particularly with regards to securingD
All of the above
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