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Conditions for crossing a rough bar are usually best at ______.A.low water slackB.high water slackC.high water ebbD.high water flood

题目

Conditions for crossing a rough bar are usually best at ______.

A.low water slack

B.high water slack

C.high water ebb

D.high water flood

相似考题

1.( )is monitored on the drain tank and header tank by magnetic switches with a 20seconds delay to prevent false alarms due to surgingA.Low pressure of the lubricating oilB.Low level of the lubricating oilC.High temperature of the lubricating oilD.High temperature of the cooling water

2.Because the circulating water is in a closed loop,_______is installed to cater for expansion and contraction of the water at different conditions of operation.A.an expansion jointB.a drain tankC.a head tankD.a contraction tank

3.The abbreviation L.W.R.P. on the navigation maps means ______.A.low water reference planeB.low winter runoff pointC.least water river planeD.land wall reference point

4.The water level showing in a boiler water gauge glass is usually ( ) duringworking.A.higher than the actual drum water levelB.equal to the actual drum water levelC.increasing due to steam condensation in the glassD.lower than actual drum wafer level

更多“Conditions for crossing a rough bar are usually best at ______.A.low water slackB.high wat ”相关问题

  • 第1题：

    Normal pool elevation is the height in feet of the section of river above a dam. This height is measured from ______.

    A.low steel on the Huey P. Long Bridge

    B.mean sea level

    C.the local water table

    D.the minimum dam control level


    正确答案：B

  • 第2题：

    What is the purpose of limber holes ________．

    A.To allow for air circulation

    B.To allow for stress and strain in rough waters

    C.To allow water in the boat to drain overboard

    D.To allow water in the bilge to get to the boat drain


    正确答案：D

  • 第3题：

    Good weather is usually associated with a region of ______.

    A.low barometric pressure

    B.high barometric pressure

    C.falling barometric pressure

    D.pumping barometric pressure


    正确答案：B
    好天气通常伴随着高压系统。

  • 第4题：

    单选题
    Speak A: Did you have a good crossing?　　Speak B: ______ . It was really rough and I am not a good sailor.
    A

    No, I am afraid not.

    B

    Yes, very pleasant crossing.

    C

    No, I hadn't.

    D

    Yes, it did.


    正确答案： A
    解析：
    意思是不，恐怕不是。C的主动词使用不当。

  • 第5题：

    单选题
    The （）pump is usually used as the bilge feed pump to an oily water separator.
    A

    turbine

    B

    screw

    C

    vane

    D

    ejector


    正确答案： B
    解析： 暂无解析

  • 第6题：

    单选题
    For the proper control of the air temperature in an air conditioning system using chilled water circulation, which of the listed conditions should remain constant regardless of load changes?（）
    A

    Chilled water system supply temperature

    B

    Chilled water system return temperature

    C

    Compressor discharge temperature

    D

    Compressor suction pressure


    正确答案： D
    解析： 暂无解析

  • 第7题：

    单选题
    In rough weather，when a ship is able to maneuver，it is best to launch a lifeboat（）.
    A

    on the lee side

    B

    on the windward side

    C

    with the wind dead ahead

    D

    with the wind from astern


    正确答案： C
    解析： 暂无解析

  • 第8题：

    单选题
    When anchoring a small sailing vessel in rough weather，the best anchor line would be composed of（）.
    A

    chain-wire

    B

    chain-manila

    C

    chain-nylon

    D

    all chain


    正确答案： A
    解析： 暂无解析

  • 第9题：

    单选题
    Under normal operating conditions, the highest temperature and pressure conditions existing in a flash-type evaporator will occur in the （）.
    A

    first stage

    B

    second stage

    C

    distillate cooler

    D

    salt water feed heater


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    Emma was specially trained before trying to swim the English channel, and after having a tough time with the rough and cold water, she______.
    A

    made it  

    B

    had succeeded

    C

    got that

    D

    set out


    正确答案： D
    解析：
    艾玛受过横渡英吉利海峡的特殊训练，在经过凶猛和冰冷的水的考验后，她成功了。make it达到预定目标, 及时抵达, 走完路程, (病痛等)好转。succeed是瞬间动词，不用完成时形式。set out出发。get that得到。根据句意，A项正确。

  • 第11题：

    单选题
    Which of the following conditions will develop if the flow of ‘raw’ cooling water to diesel engine is obstructed?（）
    A

    Air will enter the cooling system

    B

    Carbon will plug the water cooled exhaust manifolds

    C

    The jacket water temperature will rise

    D

    The lube oil viscosity will increase


    正确答案： A
    解析： 暂无解析

  • 第12题：

    单选题
    Conditions for crossing a rough bar are usually best at （）.
    A

    low water slack

    B

    high water slack

    C

    high water ebb

    D

    high water flood


    正确答案： C
    解析： 暂无解析

  • 第13题：

    What alarm is NOT found on an inert gas system ________．

    A.Low oxygen alarm

    B.Low pressure alarm

    C.Scrubber high water level alarm

    D.Deck seal low water alarm


    正确答案：A

  • 第14题：

    When crossing the magnetic equator the ______．

    A.Flinders bar should be inverted

    B.Heeling magnet should be inverted

    C.The quadrantal spheres should be rotated 180°

    D.Flinders bar should be moved to the opposite side of the binnacle


    正确答案：B

  • 第15题：

    It's the best film I've（）seen.

    • A、always
    • B、often
    • C、ever
    • D、usually

    正确答案:C

  • 第16题：

    单选题
    A fully loaded motor-propelled lifeboat must be capable of attaining a speed of at least（）.
    A

    3 knots in smooth water

    B

    6 knots in smooth water

    C

    3 knots in rough water

    D

    6 knots in rough water


    正确答案： B
    解析： 暂无解析

  • 第17题：

    单选题
    The three conditions which cause engine shutdown are overspeed，low lube oil pressure，and（）.
    A

    High lube oil pressure

    B

    High jacket water pressure

    C

    High jacket water temperature

    D

    Low jacket water pressure


    正确答案： D
    解析： 暂无解析

  • 第18题：

    单选题
    Which of the listed conditions will occur if a diesel engine exhaust valve is leaking?（）
    A

    Loss of compression for that cylinder

    B

    Misfiring or rough running

    C

    Damage to the valve

    D

    All of the above


    正确答案： C
    解析： 暂无解析

  • 第19题：

    单选题
    Small floes of rough，hummocky sea ice capable of damaging a vessel（）.
    A

    can usually be detected by radar in a smooth sea at a range of 4 to 6 kilometers

    B

    are indistinguishable from sea return on the PPI

    C

    are invisible to radar when covered with a thick layer of snow

    D

    are usually seen at night before they are close enough to provide a radar echo


    正确答案： D
    解析： 暂无解析

  • 第20题：

    单选题
    It is apparent that there was not sufficient depth of water（）and I claim that the estimated arrival draft as radioed to the agent to report to you was a close one.
    A

    for my vessel crossing safely

    B

    my vessel is to cross safely

    C

    for my vessel to cross safely

    D

    for my vessel's crossing safely


    正确答案： A
    解析： 暂无解析

  • 第21题：

    单选题
    The water level showing in a boiler water gauge glass is usually （） during working.
    A

    higher than the actual drum water level

    B

    equal to the actual drum water level

    C

    increasing due to steam condensation in the glass

    D

    lower than actual drum water level


    正确答案： C
    解析： 暂无解析

  • 第22题：

    单选题
    When crossing the magnetic equator the（）.
    A

    Flinders bar should be inverted

    B

    Heeling magnet should be inverted

    C

    The quadrantal spheres should be rotated 180°

    D

    Flinders bar should be moved to the opposite side of the binnacle


    正确答案： A
    解析： 暂无解析

  • 第23题：

    单选题
    What is the best guide for determining the proper scope of anchor chain to use for anchoring in normal conditions?（）
    A

    One shot of chain for every ten feet of water

    B

    One shot of chain for every fifteen feet of water

    C

    One shot of chain for every thirty feet of water

    D

    One shot of chain for every ninety feet of water


    正确答案： A
    解析： 暂无解析

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