itgle.com

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

题目

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

相似考题

1.In the following statements about the principle of the low level controlling, which is WRONG? 0A.Low level is monitored on the drain tank and header tank.B.If there is high differential the filters pressure across the circulatingpumps is alarmedC.The lubricating oil purifier cannot take oil from the drain tankD.If the sea water pressure falls, this also operates an alarm

2.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

3.Cylinders of marine diesel engines are normally cooled by ___ .A.sea waterB.fine mineral oilC.sanitary waterD.fresh water

4.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&39; 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

参考答案和解析
正确答案：D
更多“Biodegradation of the oil slick in sea water is assisted by all the following marine micro ”相关问题

  • 第1题：

    Which of the following is NOT on the list items to be recorded in Oil Record Book Part I (machinery space operation)?

    A.accidental discharge of oil

    B.disposal of oil residues

    C.quantity of water produced by F.W.G

    D.discharge of dirty ballast or cleaning water from fuel oil tanks


    正确答案：C

  • 第2题：

    ______is not a process of weathering of the oil spilled in the sea water.

    A.Biodegradation

    B.Dissolution

    C.Cleaning up by crew with skimmers

    D.Oxidation including photooxidation


    正确答案：C
    船员用浮油刮集船清扫不是一个油溢入海水中的风化过程。

  • 第3题：

    单选题
    One of the purposes for water cooling the exhaust manifold in marine diesel engine is to （）
    A

    reduce lube oil temperature

    B

    raise exhaust temperature reduce

    C

    excessive heating of engine room

    D

    reduce load on cooling water pump


    正确答案： C
    解析： 暂无解析

  • 第4题：

    单选题
    Which of the following is NOT on the list items to be recorded in Oil Record Book Part I (machinery space operation)?（）
    A

    Accidental discharge of oil

    B

    Disposal of oil residues

    C

    Quantity of water produced by FWG

    D

    Discharge of dirty ballast or cleaning water from fuel oil tanks


    正确答案： D
    解析： 暂无解析

  • 第5题：

    单选题
    Each cylinder liner on the marine medium speed engines （）.
    A

    is usually cooled by sea water

    B

    can be replaced when worn out

    C

    is in direct contact with the water in the bore of the cylinder

    D

    can t expand when heated


    正确答案： A
    解析： 暂无解析

  • 第6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 purifier

    B

    Fuel oil discharging from the water outlet of the lube oil purifier

    C

    Lube oil discharging from the water outlet of the lube oil purifier

    D

    A change in the lube oil viscosity


    正确答案： C
    解析： 暂无解析

  • 第7题：

    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 lubricate

    B

    lower than；can cool

    C

    higher than；can enter

    D

    higher than ；cannot enter


    正确答案： A
    解析： 暂无解析

  • 第8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 oil

    B

    The lube oil

    C

    The sea water

    D

    The fresh water


    正确答案： C
    解析： 暂无解析

  • 第9题：

    单选题
    Which of the following statements is correct concerning diesel engine cooling water systems?（）
    A

    Each engine must have its own engine driven cooling water pump capable of providing cooling for all ranges of operation

    B

    propulsion engines with bores exceeding 200 mm are to be fitted with a means to display the cooling water temperature of each cylinder

    C

    At least two independent sea suctions are to be provided for supplying water to the engine jackets or to the heat exchangers

    D

    Suitable strain are to be fitted between the circulating pumps and heat exchangers when sea water is used for direct cooling


    正确答案： B
    解析： 暂无解析

  • 第10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 oil
    A

    Ⅰ only

    B

    Ⅱ only

    C

    both Ⅰ and Ⅱ

    D

    neither Ⅰ nor Ⅱ


    正确答案： D
    解析： 暂无解析

  • 第11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

    oil

    B

    sea water

    C

    air

    D

    fresh water


    正确答案： A
    解析： 暂无解析

  • 第12题：

    单选题
    （）is not a process of weathering of the oil spilled in the sea water.
    A

    Evaporation

    B

    Dispersion

    C

    Emulsification

    D

    Drifting


    正确答案： A
    解析： 暂无解析

  • 第13题：

    Oil slick caused by spillage of oil from tanker ship is ______.

    A.a drop of oil

    B.the emulsion of oil at sea surface

    C.the weathered oil

    D.the oil floating on the surface of the sea water


    正确答案：D

  • 第14题：

    ______is not a process of weathering of the oil spilled in the sea water.

    A.Emulsification

    B.Sedimentation / Sinking

    C.Oxidation including photooxidation

    D.Burning organized by RCC


    正确答案：D
    由RCC（海上搜救协调中心）组织的燃烧不是一个油溢入海水中的风化过程。

  • 第15题：

    单选题
    Which of the following will be the function of lubricating oil used in marine engines?（）
    A

    to remove heat from oil cooled pistons

    B

    to wash away wear detritus

    C

    to neutralize acidic products

    D

    all of the above


    正确答案： A
    解析： 暂无解析

  • 第16题：

    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 voyage

    B

    The discharge overboard in port or at sea of any bilge water accumulated in machinery spaces

    C

    The loading or unloading of any or all oil cargo

    D

    All of the above


    正确答案： D
    解析： 暂无解析

  • 第17题：

    单选题
    Which of the following is wrong about operation of oily water separator?（）
    A

    filled with clean water before operation

    B

    keep air cushion in oil collecting space during running

    C

    check oil level during running

    D

    clean inner separator with low pressure stream


    正确答案： D
    解析： 暂无解析

  • 第18题：

    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

    higher

    B

    lower

    C

    very higher

    D

    very lower


    正确答案： A
    解析： 暂无解析

  • 第19题：

    单选题
    （）is not a process of weathering of the oil spilled in the sea water.
    A

    Biodegradation

    B

    Dissolution

    C

    Cleaning up by crew with skimmers

    D

    Oxidation including photooxidation


    正确答案： B
    解析： 暂无解析

  • 第20题：

    单选题
    Which of the following actions should normally be taken during each watch when the auxiliary boilers is in operation?（）
    A

    clean the flame scanner photocell window

    B

    Inspect and clean all solenoid valves

    C

    lift the safety valves by hand

    D

    Inspect for oil or water leaks


    正确答案： C
    解析： 暂无解析

  • 第21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 temperature

    B

    The oil pressure is less than the cooling water pressure

    C

    The oil pressure is greater than the cooling water pressure

    D

    The oil flow control valve is always installed in the oil input line


    正确答案： C
    解析： 暂无解析

  • 第22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

    oil

    B

    sea water

    C

    refrigerant

    D

    fresh water


    正确答案： A
    解析： 暂无解析

  • 第23题：

    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


    正确答案： D
    解析： 暂无解析

相关内容