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单选题radar（）A 无线电B 雷达C 收音机D 自动舵

题目
单选题
radar（）
A

无线电

B

雷达

C

收音机

D

自动舵

相似考题

1.Radar beacons are transmitters designed to produce a ___ on the screens of ship’s radar sets.A.incorrect imageB.distinctive imageC.pictorial imageD.pictographic image

2.The closest point of approach ( CPA ) of a contact on a relative motion radar may be determined ______.A.immediately when the contact is noted on radarB.only if the radar scope is watched constantlyC.after the contact has been marked at least twiceD.by an occasional glance at the radar

3.The common way to obtain your ship’s position is ______.A.keeping a close watch and lookoutB.taking a radar range and bearingC.observing a radar target and listening to signalsD.keeping a well clear caution

4.Radar reflectors are required for ______.A.all fishing vessels over 39 feet in lengthB.sail-propelled fishing vesselsC.all fishing vessels of less than 200 GTD.wooden hull fishing vessels with a poor radar echo

更多“radar（）”相关问题

  • 第1题：

    My radar is not working．I require shorebased radar assistance．Is shorebased radar assistance ________ ？

    A.used

    B.available

    C.in use

    D.can be used


    正确答案：B

  • 第2题：

    Which aid is NOT marked on a chart with a magenta circle?

    A.Aero light

    B.Radar station

    C.Radar transponder beacon

    D.Radiobeacon


    正确答案：A

  • 第3题：

    In order to insure that the racon signal is visible on your 3 cm radar, the ______.

    A.10 cm radar should be placed on stangby or turned off

    B.gain control should be turned to maximum

    C.radar should be stabilized, head up

    D.rain clutter control should be off but, if necessary, may be on low


    正确答案：D
    为了雷康信号在3公分雷达可见，雨雪控制开关应关闭，如需要可以调至低档。

  • 第4题：

    雷达是英文“Radar”的译音。


    正确答案:正确

  • 第5题：

    单选题
    Which conditions will normally cause a SART to operate in the active mode?（）
    A

    It will respond only to interrogation by 9-Ghz radar signals

    B

    A SART will normally respond to interrogation from a searching vessel's radar if the radar antenna is at least 15 meters high

    C

    A SART will normally respond to interrogation from a searching aircraft's radar if the radar's output power is at least 10，000 watts and the aircraft is at a height of 3000 feet and within 30 nautical miles

    D

    All of the above


    正确答案： D
    解析： 暂无解析

  • 第6题：

    单选题
    In determining a safe speed（）shall not be among those taken into account.
    A

    the characteristics，efficiency and limitation of the radar equipment

    B

    any constraints imposed by the radar range scale in use

    C

    the effect on radar detection of the sea state，weather and other sources of interference

    D

    the safe working load of the cranes both on board and ashore


    正确答案： A
    解析： 暂无解析

  • 第7题：

    单选题
    My radar is not working.I require shore based radar assistance.Is shore based radar assistance（）?
    A

    used

    B

    available

    C

    in use

    D

    can be used


    正确答案： C
    解析： 暂无解析

  • 第8题：

    单选题
    Which statement concerning the operation of radar in fog is TRUE?（）
    A

    Radar ranges are less accurate in fog

    B

    Navigation buoys will always show up on radar

    C

    A sandy beach will show up clearer on radar than a rocky cliff

    D

    Small wooden boats may not show up on radar


    正确答案： B
    解析： 暂无解析

  • 第9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10题：

    单选题
    You are underway in thick fog.You have not determined if risk of collision exists.Which statement is true?（）
    A

    Your speed must be reduced to bare steerage ways

    B

    A look-out is not required if the radar is on

    C

    The radar should always be kept on a short-range scale

    D

    Fog signals are only required when a vessel is detected by radar


    正确答案： D
    解析： 暂无解析

  • 第11题：

    单选题
    If there is any doubt as to the proper operation of a radar，which statement is TRUE?（）.
    A

    Only a radar expert can determine if the radar is operating

    B

    All radars have indicator lights and alarms to signal improper operation

    C

    A radar range compared to the actual range of a known object can be used to check the operation of the radar

    D

    The radar resolution detector must be energized to check the radar


    正确答案： A
    解析： 暂无解析

  • 第12题：

    单选题
    Which statement is TRUE concerning a vessel equipped with operational radar?（）.
    A

    She must use this equipment to obtain early warning of risk of collision

    B

    The use of a radar excuses a vessel from the need of a look-out

    C

    The radar equipment is only required to be used in restricted visibility

    D

    The safe speed of such a vessel will likely be greater than that of vessels without radar


    正确答案： D
    解析： 暂无解析

  • 第13题：

    The description Racon beside an illustration on a chart would mean a ______.

    A.radar conspicuous beacon

    B.circular radiobeacon

    C.radar transponder beacon

    D.radar calibration beacon


    正确答案：C

  • 第14题：

    In order to insure that a RACON signal is displayed on the radar, you should ______.

    A.increase the brilliance of the PPI scope

    B.turn off the interference controls on the radar

    C.use the maximum available range setting

    D.increase the radar signal output


    正确答案：B
    为了确保雷达信标信号在3厘米波雷达上被显示，你应关闭雷达上的干扰控制。

  • 第15题：

    Modern ships are navigated by（）（卫星）.

    • A、moon
    • B、satellite
    • C、sextant
    • D、radar

    正确答案:B

  • 第16题：

    单选题
    Radar beacons are transmitters designed to produce a（）on the screens of ship’s radar sets.
    A

    incorrect image

    B

    distinctive image

    C

    pictorial image

    D

    pictographic image


    正确答案： D
    解析： 暂无解析

  • 第17题：

    单选题
    It may be found that，in certain circumstances，radar beacon emissions can cause（）with the normal radar display，particularly at close range.
    A

    unwanted interference

    B

    unexpected figures

    C

    abnormal data

    D

    unwanted information


    正确答案： B
    解析： 暂无解析

  • 第18题：

    单选题
    Which statement is true concerning a vessel equipped with operational radar?（）.
    A

    The Master of the vessel must be on the bridge when the radar is in use

    B

    The radar equipment is only required to be used in restricted visibility

    C

    The use of a radar excuses a vessel from the need of a look-out

    D

    This equipment must be used to obtain early warning of risk of collision


    正确答案： A
    解析： 暂无解析

  • 第19题：

    单选题
    Which general statement concerning radar is FALSE?（）.
    A

    Raising the antenna height increases the radar range

    B

    The ability of radar to detect objects is unaffected by weather conditions

    C

    Radar bearings are less accurate than radar ranges

    D

    Radar should be checked regularly during clear weather to ensure that it is operating properly


    正确答案： C
    解析： 暂无解析

  • 第20题：

    单选题
    What is TRUE when operating in fog and other vessels are detected by radar?（）
    A

    you should make an ample change to port for a vessel crossing on the starboard bow

    B

    You should maneuver in ample time if a close-quarters situation is developing

    C

    You should determine the course and speed of all radar contacts at six minutes intervals

    D

    Long-range scanning will provide early warning of all other vessels within the radar’s range


    正确答案： C
    解析： 暂无解析

  • 第21题：

    单选题
    The shoreline along Rocky Point should give a good radar return because（）.
    A

    the shore is bluff and rocky

    B

    of offshore exposed rocks

    C

    submerged reefs cause prominent breakers

    D

    the lookout tower is marked with radar reflectors


    正确答案： A
    解析： 暂无解析

  • 第22题：

    单选题
    In order to ensure that a RACON signal is displayed on the radar，you should（）.
    A

    increase the brilliance of the PPI scope

    B

    turn off the interference controls on the radar

    C

    use the maximum available range setting

    D

    increase the radar signal output


    正确答案： B
    解析： 暂无解析

  • 第23题：

    单选题
    The closest point of approach (CPA) of a contact on a relative motion radar may be determined（）.
    A

    immediately when the contact is noted on radar

    B

    only if the radar scope is watched constantly

    C

    after the contact has been marked at least twice

    D

    by an occasional glance at the radar


    正确答案： C
    解析： 暂无解析

  • 第24题：

    单选题
    When using the radar for navigating（）.
    A

    the best fix is obtained by using a tangent bearing and a range

    B

    and using two radar ranges for a fix，the objects of the ranges should be close to reciprocal bearings

    C

    and using ranges，the most rapidly changing range should be measured last

    D

    and crossing a radar range of one object with the visual bearing of a second object，the two objects should be 80°to 110°apart


    正确答案： C
    解析： 暂无解析

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