A Doppler speed log indicates speed through the water ______.A.at all timesB.in the bottom return modeC.in the volume reverberation modeD.only when there is no current

题目

A Doppler speed log indicates speed through the water ______.

A.at all times

B.in the bottom return mode

C.in the volume reverberation mode

D.only when there is no current

相似考题

1.In moving forward, a ship imparts forward motion to the water at the stems, this is known as _____.A.the speed of the vesselB.the speed of the propellerC.the wakeD.the wake fraction

2.The owner or Master of a towing vessel shall ensure that each person that directs and controls the movement of the vessel can accomplish all of the following EXCEPT ______.A.evaluate the danger of each closing visual or radar contactB.adjust speed with due regard for the weather and visibilityC.reduce speed only where local speed limits are postedD.enter all required test and inspection results in the vessel's log or other record carried on board

3.A Forty-Foot Auto Frame（FAF）is a _______．A.Cargo unitB.Dangerous cargo containerC.Doppler speed logD.Gyro-compass and autopilot

4.According to the anti -railway group, all the followings are true but ______.A) tunnels are dangerous to public healthB) the noise and the glare of the engine fire may affect people' s nervesC) the rapid speed through the air does damage to people's lungsD) to those with high blood - pressure, the rapid speed of the train causes them to die

更多“A Doppler speed log indicates speed through the water ______.A.at all timesB.in the bottom ”相关问题

  • 第1题：

    Your ARPA has automatic speed inputs from the log．Due to currents，the log is indicating a faster speed than the speed over the ground．What should you expect under these circumstances ________．

    A.The generated CPA will be less than the actual CPA

    B.The generated TCPA will be later than the actual TCPA

    C.The range of initial target acquisition will be less than normal

    D.The targets true course vector will be in error


    正确答案：D

  • 第2题：

    A Doppler log in the volume reverberation mode indicates the ______.

    A.speed being made good

    B.speed through the water

    C.the set of the current

    D.the depth of the water


    正确答案：B
    多普勒计程仪的相对航速是相对于水的航速。

  • 第3题：

    Given the following output：  san-port-channel 12 is up   Hardware is Fibre Channel  Port WWN is 24：0c：00：0d：ec：d3：5c：00   Admin port mode is NP， trunk mode is on   Port mode is NP Port vsan is 1  Speed is 8 Gbps   Member[1] ： fc2/3  Member[2] ： fc2/4  What does "Speed is 8 Gbps" indicate？（）

    • A、 The speed of the slowest interface in the port channel
    • B、 The combined speed of all interfaces configured in the port channel
    • C、 The combined speed of all interfaces in the port channel that are up
    • D、 The speed that can be achieved if all buffers are used

    正确答案:C

  • 第4题：

    单选题
    The owner or Master of a towing vessel shall ensure that each person that directs and controls the movement of the vessel can accomplish all of the following EXCEPT（）.
    A

    evaluate the danger of each closing visual or radar contact

    B

    adjust speed with due regard for the weather and visibility

    C

    reduce speed only where local speed limits are posted

    D

    enter all required test and inspection results in the vessel's log or other record carried on board


    正确答案： A
    解析： 暂无解析

  • 第5题：

    单选题
    As a ship moves through the water，it drags with it a body of water called the wake. The ratio of the wake speed to the ship’s speed is called（）.
    A

    propeller velocity

    B

    speed of advance

    C

    wake distribution

    D

    wake fraction


    正确答案： D
    解析： 暂无解析

  • 第6题：

    单选题
    Which effect does speed through the water have on a vessel which is underway in shallow water （）.
    A

    A decrease in the speed results in a decrease in steering response and maneuverability

    B

    An increase in speed results in the stern sucking down lower than the Bow

    C

    An increase in speed results in the vessel rising on an even plane

    D

    A decrease in speed results in the vessel sucking down on an even plane


    正确答案： A
    解析： 暂无解析

  • 第7题：

    单选题
    In stopping distances of vessels，head reach can best be described as the（）.
    A

    difference between the vessel's speed through the water at any instant and the new speed ordered on the telegraph

    B

    distance the vessel has actually run through the water since a change of speed was ordered

    C

    distance the vessel will run between taking action to stop her and being stationary in the water

    D

    speed at which a vessel should proceed to ensure that she will run a predetermined distance，once her engines have been stopped


    正确答案： C
    解析： 暂无解析

  • 第8题：

    单选题
    A Doppler speed log indicates speed through the water（）.
    A

    at all times

    B

    in the bottom return mode

    C

    in the volume reverberation mode

    D

    only when there is no current


    正确答案： A
    解析： 暂无解析

  • 第9题：

    单选题
    In conventional systems, the injection pressure（）, while it’s（）in common rail diesel engines.
    A

    fluctuates with the engine speed to some extent, independent of the engine speed

    B

    keeps constant at all engine speed, dependent on the engine speed to some extent

    C

    keeps constant at all engine speed, independent of the engine speed

    D

    is decided by the engine speed, constant at all engine speed


    正确答案： B
    解析： 暂无解析

  • 第10题：

    单选题
    Every vessel should at all times proceed at a safe speed. Safe speed is defined as that speed where（）.
    A

    you can stop within your visibility range

    B

    you can take proper and effective action to avoid collision

    C

    you are traveling slower than surrounding vessels

    D

    no wake comes from your vessel


    正确答案： D
    解析： 暂无解析

  • 第11题：

    单选题
    A Doppler log in the bottom return mode indicates the（）.
    A

    velocity of the current

    B

    bottom characteristics

    C

    depth of the water

    D

    speed over the ground


    正确答案： B
    解析： 暂无解析

  • 第12题：

    单选题
    Which of the following conditions may need to be reduced when operating a large, low speed, main propulsion, diesel engine at low loads?（）
    A

    Injection pressures

    B

    Control air supply pressure

    C

    Cooling water flow through after-coolers

    D

    Lube oil temperature


    正确答案： D
    解析： 暂无解析

  • 第13题：

    A Doppler log in the bottom return mode indicates the ______.

    A.velocity of the current

    B.bottom characteristics

    C.depth of the water

    D.speed over the ground


    正确答案：D
    多普勒计程仪的绝对航速是相对于地面的速度。

  • 第14题：

    A Doppler speed log indicates speed over ground ______.

    A.at all times

    B.in the bottom return mode

    C.in the volume reverberation mode

    D.only when there is no current


    正确答案：B
    多普勒计程仪是多普勒计程仪绝对显示模式。

  • 第15题：

    单选题
    A vessel reduces speed without backing. The rate that her speed through the water decreases depends primarily on the（）.
    A

    vessel's horsepower

    B

    sea state

    C

    number of propellers

    D

    vessel's displacement


    正确答案： B
    解析： 暂无解析

  • 第16题：

    单选题
    An electronic depth finder operates on the principle that（）.
    A

    radio signals reflect from a solid surface

    B

    sound waves travel at a constant speed through water

    C

    radar signals travel at a constant speed through water

    D

    pressure increases with depth


    正确答案： D
    解析： 暂无解析

  • 第17题：

    单选题
    Which statement about stopping a vessel is TRUE?（）
    A

    A lightly laden vessel requires as much stopping distance as a fully laden vessel when the current is from astern

    B

    A vessel is dead in the water when the back wash from astern operation reaches the bow

    C

    A tunnel bow thruster can be used in an emergency to reduce the stopping distance

    D

    When a vessel is dead in the water any speed displayed by doppler log reflects the current


    正确答案： B
    解析： 暂无解析

  • 第18题：

    单选题
    Which of the following procedures should be carried out when a large, low-speed, diesel engine is operated with one cylinder secured?（）
    A

    Lubrication to the defective cylinder should be increased

    B

    Cooling water temperature to the engine should be increased

    C

    Only the turbocharger speed should be reduced

    D

    Engine speed should be reduced


    正确答案： D
    解析： 暂无解析

  • 第19题：

    单选题
    When the vessel on the full speed ahead, if full astern immediately （） the main engine start astern and fuel injection.
    A

    after the thrust power is zero

    B

    after the torsion is zero

    C

    surpass the critical point on the water turbo phase

    D

    after the speed is zero


    正确答案： C
    解析： 暂无解析

  • 第20题：

    问答题
    A train traveling at a speed of 80 mph enters a tunnel that is 0.5 miles long. The length of the train is 0.25 miles. How long does it take for all of the train to pass through the tunnel, from the moment the front enters, to the moment the rear emerges?

    正确答案： One minute.
    解析：
    由于车头进隧道到车尾出隧道这一段时间也要包括在内，因此火车通过的路程实际上是隧道长加车长，即0.5+0.25=0.75(miles)。则可列方程80miles/60minutes=0.75miles/x, x=0.5625(minute)≈1minute.

  • 第21题：

    单选题
    In order to maintain a safe speed at all times，any necessary alterations of speed must（）.
    A

    be instantly put on

    B

    be instant put into use

    C

    be instantly put into effect

    D

    be put immediately


    正确答案： B
    解析： 暂无解析

  • 第22题：

    单选题
    A Doppler log in the volume reverberation mode indicates（）.
    A

    speed being made good

    B

    speed through the water

    C

    the set of the current

    D

    the depth of the water


    正确答案： C
    解析： 暂无解析

  • 第23题：

    单选题
    A Doppler speed log indicates speed over ground（）.
    A

    at all times

    B

    in the bottom return mode

    C

    in the volume reverberation mode

    D

    only when there is no current


    正确答案： B
    解析： 暂无解析

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