单选题Most propellers on merchant vessels are constructed of（）.A managanese bronzeB cast ironC mild steelD improved plow steel

题目
单选题
Most propellers on merchant vessels are constructed of（）.
A

managanese bronze

B

cast iron

C

mild steel

D

improved plow steel

相似考题

1.The SOLAS Convention in its successive forms is generally regarded as the most important of all international treaties concerning the ______of merchant ships.A.pollutionB.economizationC.safetyD.efficiency

2.You are in charge of a towing vessel that operates exclusively on inland waters. You regularly tow barges that provide services (cargo lighters，fuel barges，etc.) to foreign flag vessels in port. What will be accepted as proper credentials for you and your crew?A.No credentials are required since you operate on inland waters onlyB.Social Security cardC.State driver's license with photo IDD.Merchant Mariner's Document

3.The most common type of davit found on merchant vessels today is the ______．A.RadialB.Sheath-screwC.GravityD.Quadrantal

4.A shipboard oil pollution emergency plan is required of ______.A.all vessels, regardless of size and commercial applicationB.any barge or other ship which is constructed or operated in such a manner that no oil in any form can be carried aboardC.an oil tanker of 150 gross tons or above, or other ship of 400 gross tons or aboveD.an oil tanker of 400 gross tons and above, or other ships of 150 gross tons and above

更多“Most propellers on merchant vessels are constructed of（）.”相关问题

  • 第1题：

    Which statement about tunnel bow thrusters fitted to large vessels is TRUE ________．

    A.They are effective on most vessels at speeds up to 10 knots

    B.Because of their location，most modern installations have as much power as a tug

    C.They are fully effective at all drafts

    D.When going astern at slow speed，they provide effective steering control


    正确答案：D

  • 第2题：

    Aboard damaged vessels, the MOST important consideration is preserving ______.

    A.bilge pumping capacity

    B.reserve buoyancy

    C.level attitude

    D.Instability


    正确答案：B
    在一艘受损的船上，考虑最重要的是保存剩余浮力。

  • 第3题：

    Most propellers on merchant vessels are constructed of______．

    A.manganese bronze

    B.cast iron

    C.mild steel

    D.improved plow steel


    正确答案：A
    许多船舶的螺旋桨都是锰铜做的。

  • 第4题：

    单选题
    （）are increasingly used as main engine on merchant vessels, because they have a high Hp/Weight ratio.
    A

    Slow speed diesel engines

    B

    Medium-speed diesel engines

    C

    Steam engines

    D

    Gasoline engines


    正确答案： C
    解析： 暂无解析

  • 第5题：

    单选题
    （） can be found on most medium to large merchant vessels even if the main engine is either a steam turbine or 2-stroke crosshead engine.
    A

    The medium speed 4-stroke trunk piston engine

    B

    The low speed 2-stroke crosshead engine

    C

    The medium speed 2-stroke crosshead engine

    D

    The low speed 4-stroke trunk piston engine


    正确答案： A
    解析： 暂无解析

  • 第6题：

    单选题
    A vessel brought alongside should be fended off the towing vessel by（）.
    A

    crew members using their arms

    B

    crew members using the strong muscles of their legs

    C

    fenders

    D

    No fending is necessary due to the rugged construction of most towing vessels


    正确答案： D
    解析： 暂无解析

  • 第7题：

    单选题
    A shipboard oil pollution emergency plan is required of （）.
    A

    all vessels, regardless of size and commercial application

    B

    any barge or other ship which is constructed or operated in such a manner that no oil in any form can be carried aboard

    C

    an oil tanker of 150 gross tons or above, or other ship of 400 gross tons or above

    D

    an oil tanker of 400 gross tons and above, or other ships of 150 gross tons and above


    正确答案： A
    解析： 暂无解析

  • 第8题：

    单选题
    To prevent damage by and to storage batteries aboardsmall passenger vessels they should be located（）.
    A

    in trays constructed of material that is resistant to the electrolyte

    B

    so as to prevent movement when the vessel pitches and rolls

    C

    in a well ventilated area

    D

    All of the above


    正确答案： D
    解析： 暂无解析

  • 第9题：

    单选题
    Several merchant ships are arriving at the scene of a distress incident. One of the them must assume the duties of the Coordinator Surface Search (CSS). Which of the following statements is TRUE?（）.
    A

    CSS duties are always assumed by passenger vessels，dry cargo vessels，or tankers in that order of precedence

    B

    The CSS must be established by mutual agreement between the ships concerned

    C

    A tanker should never be assigned CSS duties unless only tankers are present

    D

    The first vessel to arrive at the distress incident is designated as the CSS


    正确答案： B
    解析： 暂无解析

  • 第10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11题：

    单选题
    Several merchant ships are arriving at the scene of a distress incident. One of the them must assume the duties of the Coordinator Surface Search (CSS). Which of the following statements is TRUE? （）
    A

    CSS duties are always assumed by passenger vessels，dry cargo vessels，or tankers in that order of precedence

    B

    The CSS must be established by mutual agreement between the ships concerned

    C

    A tank vessel should never be assigned CSS duties unless only tank vessels are present

    D

    The first vessel to arrive at the distress incident is designated as the CSS


    正确答案： C
    解析： 暂无解析

  • 第12题：

    单选题
    Aboard damaged vessels，the MOST important consideration is preserving（）.
    A

    bilge pumping capacity

    B

    reserve buoyancy

    C

    level attitude

    D

    instability


    正确答案： C
    解析： 暂无解析

  • 第13题：

    A vessel brought alongside should be fended off the towing vessel by ______.

    A.crew members using their arms

    B.crew members using the strong muscles of their legs

    C.fenders

    D.No fending is necessary due to the rugged construction of most towing vessels


    正确答案：C
    装在船舶舷边上用来保护拖轮的称为防撞垫

  • 第14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15题：

    单选题
    The main office building was constructed on the most ______ piece of land in town.
    A

    desirable

    B

    desire

    C

    desired

    D

    desirably


    正确答案： A
    解析：
    句意：主办公楼建在城中最好的地段。空格处修饰表示物的名词，用形容词，选项中desirable意为“合意的”，符合句意。desired渴望的。

  • 第16题：

    单选题
    Fire extinguishers on inspected vessels are numbered by size I through V，with I being（）.
    A

    used for electrical fires only

    B

    the smallest

    C

    the most accessible

    D

    the most effective


    正确答案： B
    解析： 暂无解析

  • 第17题：

    单选题
    Most very large ocean going vessels，such as bulk carriers and large tankers，tend to squat（）.
    A

    by the bow

    B

    by the stern

    C

    at the end nearest the bottom

    D

    evenly fore and aft


    正确答案： D
    解析： 暂无解析

  • 第18题：

    单选题
    Fire detecting systems on merchant vessels may be arranged to sense （）.
    A

    smoke

    B

    rate of temperature rise

    C

    ionized particles

    D

    all of the above


    正确答案： A
    解析： 暂无解析

  • 第19题：

    单选题
    A shipboard Oil Pollution Emergency Plan is required of（）.
    A

    all vessels，regardless of size and commercial application

    B

    any barge or ship constructed or operated in such a manner that no oil in any form can be carried aboard

    C

    an oil tanker of 150 gross tons and above，or other ship of 400 gross tons and above

    D

    an oil tanker of 400 gross tons and above，or other ships of 150 gross tons and above


    正确答案： A
    解析： 暂无解析

  • 第20题：

    单选题
    The reason why more and more of the large merchant vessels are being powered by medium-speed diesel engines is （）.
    A

    they operate between 150 and 450 rpm

    B

    they are connected to the propeller by gearing

    C

    their smaller size and weight

    D

    they can be connected directly to the propeller without gearing


    正确答案： B
    解析： 暂无解析

  • 第21题：

    单选题
    For vessels with （）, the meaning of the order would include the combination of pitch and revolutions as indicated in ships orders.
    A

    fixed pitch propellers

    B

    uncontrollable pitch propeller

    C

    constant pitch propellers

    D

    variable pitch propellers


    正确答案： B
    解析： 暂无解析

  • 第22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23题：

    单选题
    Most propellers on merchant vessels are constructed of（）.
    A

    managanese bronze

    B

    cast iron

    C

    mild steel

    D

    improved plow steel


    正确答案： D
    解析： 暂无解析

  • 第24题：

    单选题
    In most cases，when a large merchant vessel enters shallow water at high speed the（）.
    A

    maneuverability will increase

    B

    speed will increase

    C

    bow will squat farther than the stern

    D

    vessel will rise slightly，on a level plane


    正确答案： A
    解析： 暂无解析

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