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单选题Some vessels are equipped with a water lubricated stern robeWhen at sea, operating under normal conditions, the water service valve from the ships saltwater system to the bearing should be （）.A closed, and no leakage permitted across the shaft packingB

题目
单选题
Some vessels are equipped with a water lubricated stern robeWhen at sea, operating under normal conditions, the water service valve from the ships saltwater system to the bearing should be （）.
A

closed, and no leakage permitted across the shaft packing

B

closed, and only slight leakage permitted across the shaft packing

C

open, and no leakage permitted across the shaft packing

D

open, and only slight leakage permitted across the shaft packing

相似考题

1.Stern tube and strut(支柱) bearings lined with hardwood or rubber composition materials are lubricated with______.A.saltwaterB.graphite(石墨)C.light lubricating oilD.heavy lubricating oil

2.Vessels lying afloat at buoys for more than 24 hours should use anchor chain for ______ and insurance wire for ______.A.bow mooring／stern lineB.forward spring／after springC.forward breast rope／forward springD.slip rope／stern line

3.Which of the following would be considered downflooding on a fishing vessel as defined in regulation?A.Vessel heels until water enters a hatchB.Vessel in collision floods through a damaged area above the waterlineC.Vessel takes on water due to the hatches being left open in heavy rainD.Vessel takes on water by the propeller shaft due to failure of the stern gland

4.Keep ________ between the passing vessels．A.well areasB.good clearC.water spacesD.ample room

更多“Some vessels are equipped with a water lubricated stern robe”相关问题

  • 第1题：

    What type of stern tube bearing has the least friction ________．

    A.Oil-lubricated bearings

    B.Lignum vitae

    C.Hard rubber

    D.Bronze bushings


    正确答案：A

  • 第2题：

    Kort nozzles are installed around the propellers of some vessels to ______.

    A.increase the thrust of the propeller

    B.protect the propeller from striking sawyers

    C.protect the propeller from striking barges towed on the hip

    D.protect the propeller from touching bottom in low water


    正确答案：A
    一些船舶装配在螺旋桨周围的导流管会减少螺旋桨的？推力。

  • 第3题：

    单选题
    A shallow dish positioned at the normal water level is connected to the（）This enables the blowing down or removal of scum and impurities from the water surface.
    A

    main stern stop valve

    B

    auxiliary steam stop valve

    C

    scum valve

    D

    blow down valve


    正确答案： B
    解析： 暂无解析

  • 第4题：

    单选题
    Your vessel is damaged with no list，but down by the stern. There is progressive flooding and trim by the stern is increasing. What is the effect on transverse stability after the deck edge at the stern is submerged?（）
    A

    KB increases，increasing BM and therefore GM

    B

    KG increases due to the weight of the added water on deck

    C

    BM decreases from loss of water plane and greater volume

    D

    There is no effect on transverse stability


    正确答案： A
    解析： 暂无解析

  • 第5题：

    单选题
    An excessive amount of water is prevented from entering a vessel using a water lubricated stern tube bearing by the use of the （）.
    A

    propeller hub

    B

    lignum vitae

    C

    shaft packing

    D

    labyrinth seal


    正确答案： B
    解析： 暂无解析

  • 第6题：

    单选题
    A vessel has been equipped with an oil lubricated stern bearing and is undergoing a routine dry-dock.Which of the following inspection should be made when the tail-shaft has been drawn?（）
    A

    The overall condition of the bearing surface should be examined

    B

    The shaft liner should be inspected for cracks and tested to insure a tight fit

    C

    The stern tube should be tested for cracks with dye penetrant

    D

    all of above


    正确答案： D
    解析： 暂无解析

  • 第7题：

    单选题
    In a disk-type lubricating oil purifier, （）
    A

    the purifier driving gears are lubricated by the reclaimed

    B

    oil as it leaves the bowl all dirt and sludge are automatically discharged with the cooling water

    C

    sealing water must never be supplied until after oil is fed to the unit

    D

    deterioration of the bowl ring gasket will cause the purifier to lose its water seal


    正确答案： D
    解析： 暂无解析

  • 第8题：

    单选题
    A METHOD OF TOWING VESSELS THROUGH POLAR ICE BY MEANS OF ICEBREAKING TUGS WITH A SPECIAL STERN NOTCH SUITED TO RECEIVE AND HOLD THE BOW OF THE VESSEL TO BE TOWED defines（）.
    A

    Towing operations

    B

    Rigid coupled towing

    C

    Close coupled towing

    D

    Hard coupled towing


    正确答案： D
    解析： 暂无解析

  • 第9题：

    单选题
    On tank vessels equipped with power operated cargo tank valves, the type of power operator most commonly used is （）.
    A

    hydraulic

    B

    electric

    C

    steam

    D

    diesel


    正确答案： B
    解析： 暂无解析

  • 第10题：

    单选题
    Some vessels are equipped with a water lubricated stern robeWhen at sea, operating under normal conditions, the water service valve from the ships saltwater system to the bearing should be （）.
    A

    closed, and no leakage permitted across the shaft packing

    B

    closed, and only slight leakage permitted across the shaft packing

    C

    open, and no leakage permitted across the shaft packing

    D

    open, and only slight leakage permitted across the shaft packing


    正确答案： B
    解析： 暂无解析

  • 第11题：

    单选题
    Which of the following statements is TRUE regarding automatic identification systems (AIS)? （）
    A

    AIS is a global tracking system that relies upon INMARSAT C service to communicate vessel position and other safety related information to similarly equipped vessels，aircraft and shore stations within the area

    B

    AIS is a short-range 3 cm X-band radar system that automatically sends a vessel's position and other safety related information to similarly equipped vessels，aircraft and shore stations within the area

    C

    AIS is a short-range VHF-FM system that automatically broadcasts a vessel's position and other safety related information frequently to similarly equipped vessels，aircraft and shore stations within the area

    D

    AIS is a one-way centrally managed system that requires the local VTS to send commands to instruct each vessel to broadcast position and other safety related information to similarly equipped vessels，aircraft and shore stations within the area


    正确答案： B
    解析： 暂无解析

  • 第12题：

    单选题
    What type of stern tube bearing has the least friction（）.
    A

    Oil-lubricated bearings

    B

    Lignum vitae

    C

    Hard rubber

    D

    Bronze bushings


    正确答案： A
    解析： 暂无解析

  • 第13题：

    Vessels required to be equipped with an approved backfire flame arrester are ______．

    A.Those with diesel engines

    B.All those with gasoline engines

    C.Those with large engines only

    D.None of the above


    正确答案：B

  • 第14题：

    单选题
    According to the Code of Federal Regulations，on vessels other than river ferryboats and river vessels，how are periodic lifeboat weight tests required to be conducted?（）
    A

    The lifeboat is lowered to near the water，loaded with the allowed capacity，lowered into the water until afloat，then released from the falls

    B

    The lifeboat is loaded with the allowed capacity，lowered into the water until afloat，then released from the falls

    C

    The lifeboat is lowered into the water until afloat，loaded with the allowed capacity，then released from the falls

    D

    The lifeboat is lowered to near the water，loaded with the allowed capacity，then released from the falls


    正确答案： A
    解析： 暂无解析

  • 第15题：

    单选题
    Water may boil up around the stern of a vessel in a channel due to（）.
    A

    slack water when upbound

    B

    shallow water

    C

    a cross current

    D

    a head current


    正确答案： B
    解析： 暂无解析

  • 第16题：

    单选题
    Which information must automatic identification systems (AIS) automatically provide to appropriately equipped shore stations，vessels and aircraft? （）
    A

    Vessel's type

    B

    Vessel's course

    C

    Navigational status

    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 would be considered downflooding on a fishing vessel as defined in regulation? （）
    A

    Vessel heels until water enters a hatch

    B

    Vessel in collision floods through a damaged area above the waterline

    C

    Vessel takes on water due to the hatches being left open in heavy rain

    D

    Vessel takes on water by the propeller shaft due to failure of the stern gland


    正确答案： C
    解析： 暂无解析

  • 第18题：

    单选题
    Water lubricated tailshaft bearings wear,（）
    A

    the after one is more than forward one

    B

    the forward one is more than after one

    C

    the forward one is the same with after one

    D

    it depends on the type of engine


    正确答案： B
    解析： 暂无解析

  • 第19题：

    单选题
    Vessels lying afloat at buoys for more than 24 hours should use anchor chain for（）and insurance wire for（）.
    A

    bow mooring／stern line

    B

    forward spring／after spring

    C

    forward breast rope／forward spring

    D

    slip rope／stern line


    正确答案： C
    解析： 暂无解析

  • 第20题：

    单选题
    Kort nozzles are installed around the propellers of some vessels to（）.
    A

    Increase the thrust of the propeller

    B

    Protect the propeller from striking sawyers

    C

    Prevent the propeller from striking barges towed on the ship

    D

    Prevent the propeller from touching bottom in low water


    正确答案： B
    解析： 暂无解析

  • 第21题：

    单选题
    Vessels required to be equipped with an approved backfire flame arrester are（）.
    A

    those with diesel engines

    B

    all those with gasoline engines

    C

    those with large engines only

    D

    None of the above


    正确答案： D
    解析： 暂无解析

  • 第22题：

    单选题
    A waste heat boiler is installed on some diesel propelled vessels to （）.
    A

    provide steam for emergency propulsion

    B

    provide steam for the turbo-generator

    C

    heat the waste water tanks

    D

    steam for warming engines


    正确答案： D
    解析： 暂无解析

  • 第23题：

    单选题
    You intend to overtake a vessel in a narrow channel.As you approach the other vessel’s stern（）
    A

    you will gain speed

    B

    both vessels will gain speed

    C

    the vessels will drift together

    D

    the vessels will drift apart


    正确答案： D
    解析： 暂无解析

  • 第24题：

    单选题
    Regulations require that tank vessels handling grade B liquids shall have their cargo pumps separated from all sources of vapor ignition by（）.
    A

    cofferdams

    B

    empty cargo spaces

    C

    gas tight bulkheads

    D

    areas equipped with power ventilation


    正确答案： B
    解析： 暂无解析

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