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单选题
Biodegradation of the oil slick in sea water is assisted by all the following marine micro-organisms which are capable of metabolising oil compounds except（）.
A
bacteria
B
moulds
C
yeasts
D
seals
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In the following statements about the principle of the low level controlling, which is WRONG? 0
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第二组The only attention that heat exchanger should require is to ensure that the heat transfer surfaces remain substantially clean and the flow passages generally clear of obstruction. Indication that undue fouling is occurring is given by a progressive increase in the temperature difference between the two fluids, over a period of time, usually accompanied by a noticeable rise in pressure loss at a given flow.Fouling on the sea-water side is the most usual cause of deterioration in performance. The method of cleaning the sea water-side surfaces depends on the type of heat exchanger. With shell-and-tube heat exchangers, the removal of the header covers or, m the case of the smaller heat exchangers, the headers themselves, will provide access to the tubes. Obstructions, dirt, scale etc., can then be removed, using the tools provided by the heat exchanger manufacturer. Flushing through with fresh water is recommended before a heat exchanger is returned to service. In some applications, such as piston oil cooling, progressive fouling may take place on the outside of the tubes. Most manufactures recommend a chemical flushing pr6cess to remove this in situ~ without dismantling the heat exchanger.Plate heat exchangers may be cleaned by unclamping the stack of plates and mechanically cleaning the surface of each plate as recommended by the manufacturers. The plate seals may require replacement from time to time and here the manufacturers instructions should be closely followedBy which of the following indication, can we conclude that the lube oil-sea water heat exchanger is unduly fouled?A.the heat exchanger lube oil inlet temperature loweringB.the heat exchanger sea-water outlet pressure riseC.the heat exchanger temperature difference between lube oil and sea water increasingD.the heat exchanger pressure difference between sea water inlet and outlet decreasing
考题
What is the most usual reason for the fresh water-sea water heat exchanger fouling in the sea side?A.lube oil sludge accumulating in itB.dirt and scale etc , formed on the surfacesC.deformation of the tubes and the shell or the platesD.lube oil leakage into sea-water side
考题
Biodegradation of the oil slick in sea water is assisted by all the following marine micro-organisms which are capable of metabolising oil compounds except ______A.bacteriaB.mouldsC.yeastsD.seals
考题
Oil slick caused by spillage of oil from tanker ship is ______.A.a drop of oilB.the emulsion of oil at sea surfaceC.the weathered oilD.the oil floating on the surface of the sea water
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OIL-IN-WATER are ______．A.sediment of oil in waterB.oil dissolvents in waterC.solid oil aggregatesD.droplets of oil suspended in water
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______is not a process of weathering of the oil spilled in the sea water.A.BiodegradationB.DissolutionC.Cleaning up by crew with skimmersD.Oxidation including photooxidation
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______is not a process of weathering of the oil spilled in the sea water.A.EmulsificationB.Sedimentation / SinkingC.Oxidation including photooxidationD.Burning organized by RCC
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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 fresh water generator produces fresh water （）.A
by cooling sea waterB
by heating sea waterC
by evaporation of sea waterD
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单选题Which of the following operations aboard a tanker must be recorded in the Oil Record Book （）A
Any internal transfer of oil cargo during a voyageB
The discharge overboard in port or at sea of any bilge water accumulated in machinery spacesC
The loading or unloading of any or all oil cargoD
All of the above
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单选题What should you apply to a fathometer reading to determine the depth of water?（）A
Subtract the draft of the vesselB
Add the draft of the vesselC
Subtract the sea water correctionD
Add the sea water correction
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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Oil pressure in the lubrication system is（）than the static sea water head to ensure that sea water cannot enter the sterntube in the event of seal failure.A
higherB
lowerC
very higherD
very lower
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单选题Oil pressure in the lubrication system is （） the static sea water head to ensure that sea water （） the stem-tube.A
lower than；can lubricateB
lower than；can coolC
higher than；can enterD
higher than ；cannot enter
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单选题（）is not a process of weathering of the oil spilled in the sea water.A
BiodegradationB
DissolutionC
Cleaning up by crew with skimmersD
Oxidation including photooxidation
考题
单选题An oil water monitor is required in order to measure （）.A
the oil content in waterB
the water content in fuel oilC
the water level in bilge wellD
the oil level in bilge well
考题
单选题（） is used for cylinder and cylinder head, the salt water is used for cooling the lubricating oil, the fresh water in the coolers and the charging air in the air cooler.A
The fuel oilB
The lube oilC
The sea waterD
The fresh water
考题
单选题In a diesel engine jacket water cooler, with seawater cooling the fresh water, the（）A
sea water temperature must never be warmer than 40℃B
jacket water pressure should always be greater than the sea water pressureC
jacket water temperature must always be less than 60℃D
jacket water pressure must always be less than the sea water pressure
考题
单选题Which of the following statements is true concerning an oil cooler?（）A
The oil temperature is less than the cooling water temperatureB
The oil pressure is less than the cooling water pressureC
The oil pressure is greater than the cooling water pressureD
The oil flow control valve is always installed in the oil input line
考题
单选题Which of the following operations must be entered on the Oil Record Book Part Ⅰ? （） Ⅰ.Routine discharge at sea of bilge water containing oil from the machinery spaces Ⅱ.Bunkering of fuel oilA
Ⅰ onlyB
Ⅱ onlyC
both Ⅰ and ⅡD
neither Ⅰ nor Ⅱ
考题
单选题In an oil cooler circulated by sea water, the oil is at a larger pressure the result being that any leak in the cooler will mean a loss of （）.A
oilB
sea waterC
refrigerantD
fresh water
考题
单选题Where tanks are arranged for either oil or ballast （） must be fitted in the pipe so that only the ballast main or the oil transfer main connected to the tank.A
a sea water chestB
a change-over chestC
a buffer tankD
a three-way valve
考题
单选题In a general oil cooler circulated by sea water, the oil is at a higher pressure, the result being that any leak in the cooler will mean a loss of （）.A
oilB
sea waterC
airD
fresh water
考题
单选题（）is not a process of weathering of the oil spilled in the sea water.A
EvaporationB
DispersionC
EmulsificationD
Drifting
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
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