C3I system for Air Defense 即为防空C3I系统，下列哪一项不是其中之一：（）A、指挥B、控制C、通信D、侦察

题目

C3I system for Air Defense 即为防空C3I系统，下列哪一项不是其中之一：（）

  • A、指挥
  • B、控制
  • C、通信
  • D、侦察
相似考题

1.What is the function of the after-coolers installed in the diesel engine air intake system?A.Decrease the air densityB.Increase the exhaust temperatureC.Decrease the lube oil temperatureD.Increase the air density

2.Air cocks, usually positioned at the_______in a circulating system, is used to get rid of the air in the system.A.bending jointB.expansion tankC.weldD.the highest point

3.Restrictions occurring in the small orifices(孔) of pneumatic control system components can be caused by ______.A.moisture in the compressed air supplyB.excessive dryness in the compressed air supplyC.pressure surging in the compressed air receiverD.insufficient lubrication of the system components

4.第二组Under normal operation, some lubrication oil mist may be discharged from the air compressor to the air start system. This oil may be from excess compressor cylinder lubrication, from faulty oil scraper rings, or may even be suspended oil vapor contaminating the engine room atmosphere and drawn in at the compressor suction. Oil discharge is kept to a minimum by draining the after cooler, air receiver and starting system. If small quantities of lubrication oil do get passed into the starting air system, they will deposit as thin moist film over internal pipe surfaces but are not readily combustible. If a cylinder non-return valve leak while the engine is in operation, some hot gas, possibly with unburned fuel and cylinder lubrication oil, may be blown through the valve to the adjacent air manifold. With further heating from the leaky valve, this, together with the already deposited oil film, will carbonize and form. incandescent carbon. If starting air is applied to the system while still hot, the high pressure air coming into contact with the burning carbon may cause an explosion. Such an explosion will cause a flame to pass back through the air start pipe system, evaporating the deposited oil film and igniting it in the presence of air. Very high velocities and shockwaves are generated which may rupture pipes and fittings.Alternatively, if excessive oil has entered the air start system, a mixture of air and oil droplets may be discharged through the open cylinder non-return valve during starting. This spray may ignite due to high temperatures in the cylinder, causing a flame through the still open valve to the air manifold.To prevent an explosion, air start valves must be correctly maintained and lubricated to ensure correct timing and free movement with positive closing. Oil in the system must be kept to a minimum, pipe lines must be drained and cleaned internally when necessary and oil discharge from air compressors must be kept to a minimum by good maintenance.The passage is mainly aboutA.crankcase explosionB.scavenge box fireC.starting air pipeD.the danger of explosion in the starting air system

参考答案和解析
正确答案:D
更多“C3I system for Air Defense 即为防空C”相关问题

  • 第1题：

    In an air conditioning system, moisture is removed from the air by ______.

    A.filters

    B.separators

    C.ducted traps

    D.dehumidifiers


    正确答案：D

  • 第2题：

    C3I的内容是什么？C3I的系统设备与结构是什么？


    正确答案: 用电子计算机将指挥、控制、通信和情报个分系统紧密联系在一起的综合系统。
    设备：计算机中心；通信网络；终端设备。

  • 第3题：

    单选题
    Air blowing from the intake air filter of an operating air compressor indicates （）.
    A

    broken inlet valves

    B

    broken discharge valves

    C

    pulsations in the air distribution system

    D

    overloading of the air distribution system


    正确答案： A
    解析： 暂无解析

  • 第4题：

    单选题
    In an air conditioning system, moisture is removed from the air by（）
    A

    filers

    B

    separators

    C

    ducted traps

    D

    dehumidifiers


    正确答案： C
    解析： 暂无解析

  • 第5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6题：

    单选题
    Air cocks, usually positioned at the （） in a circulating system, is used to get rid of the air in the system.
    A

    bending joint

    B

    expansion tank

    C

    weld

    D

    the highest point


    正确答案： C
    解析： 暂无解析

  • 第7题：

    单选题
    In the starting system, the automatic valve is controlled by（）, and the cylinder start valves are controlled by（）
    A

    pilot air；pilot air

    B

    handle；solenoid

    C

    handle；pilot air coming through the distributor

    D

    solenoid；pilot air coming through the distributor


    正确答案： B
    解析： 暂无解析

  • 第8题：

    判断题
    To keep the prosperity of the air industry, the Department of Defense has invested a lot of money to develop an innovative type of aircraft which does not need a runway.
    A

    对

    B

    错


    正确答案： 错
    解析：
    词汇理解。该段录音的首句便提出问题：在面临种种困难的情况下，航空业如何才能保持繁荣兴盛?紧接着录音中指出“One answer may come from the Department of Defense, which had sponsored development of an innovative new type of aircraft that doesn’t need a runway…”，可知为了保持航空业的繁荣，国防部已经投资研制一种新型飞机，而该种飞机不需要跑道，与题干表述内容相吻合。
    【录音原文】
    With major airports facing chronic traffic jams and nobody volunteering to have a new airport built in his backyard, how is the air-travel boom going to sustain itself? One answer may come from the Department of Defense, which had sponsored development of an innovative new type of aircraft that doesn’t need a runway; its engine pods point upward for vertical takeoff, then tilt horizontally for forward flight.

  • 第9题：

    单选题
    If an air compressor is used to supply compressed air to outlets throughout the engine room and on deck of a vessel, the system is known as the （）.
    A

    combustion control air system

    B

    supply air system

    C

    ships service air system

    D

    low pressure deck air system


    正确答案： D
    解析： 暂无解析

  • 第10题：

    单选题
    To prevent the unnecessary loading of an air conditioning system while maintaining the designed dry bulb temperature and relative humidity in an air conditioning system, you should （）
    A

    admit only enough fresh outside air to provide proper ventilation

    B

    reduce the air reheating system load

    C

    lower the compressor head pressure

    D

    operate the purge recovery unit continuously


    正确答案： C
    解析： 暂无解析

  • 第11题：

    单选题
    Pump up the starting air reservoirs to their maximum pressure and （）the air reservoirs and air system.
    A

    open

    B

    close

    C

    drain

    D

    vent


    正确答案： C
    解析： 暂无解析

  • 第12题：

    单选题
    What is the function of the after-cooler installed in the diesel engine air intakes system?（）
    A

    Decrease the air density

    B

    Increase the exhaust temperature

    C

    Decrease the lube oil temperature

    D

    Increase the air density


    正确答案： A
    解析： 暂无解析

  • 第13题：

    The“three arms of government” of Australia refers to the Parliament，the Executive Government and( )

    A.the Judiciary
    B.the High Court
    C.the Defense Force
    D.the Air Force

    答案：A
    解析：
    考查澳大利亚国家概况。澳大利亚政府的“三权分立”指的是司法、立法和行政三权分立。故A项the Judiciary (司法)符合题意。其余三项，B项the High Court (高等法院)，C项the Defense Force(国防力量)和D项the Air Force(空军)均不符合。

  • 第14题：

    《人民防空工程设计防火规范》规定，人民防空工程即为保障人民防空指挥、（　）、掩蔽等需要而建造的防护建筑。

    • A、通电
    • B、通信
    • C、通讯

    正确答案:B

  • 第15题：

    单选题
    What is the function of an air receiver in the compressed air system on a ship? （）
    A

    Condenses moisture

    B

    Provides overpressure protection

    C

    Purifies the air

    D

    Acts as an accumulator


    正确答案： C
    解析： 暂无解析

  • 第16题：

    单选题
    A re-heater in an air conditioning system functions to （）.
    A

    control inlet air temperature

    B

    control inlet air volume

    C

    maintain relative humidity at 15%

    D

    restore conditioned air temperature to a comfortable level


    正确答案： B
    解析： 暂无解析

  • 第17题：

    单选题
    Restrictions occurring in the small orifices of pneumatic control system components can be used by （）
    A

    moisture in the compressed air supply

    B

    excessive dryness in the compressed air supply

    C

    pressure surging in the compressed air receiver

    D

    insufficient lubrication of the system components


    正确答案： C
    解析： 暂无解析

  • 第18题：

    单选题
    Diesel engine air start system check valves are opened by （）
    A

    an air start cam

    B

    cylinder compression pressure

    C

    starting air pressure

    D

    valve springs


    正确答案： D
    解析： 暂无解析

  • 第19题：

    单选题
    The primary task of the compressed air system is to deliver the starting air necessary for （）
    A

    starting the ME

    B

    starting the emergency electric alternator

    C

    driving the main turbine

    D

    driving the turbocharger


    正确答案： A
    解析： 暂无解析

  • 第20题：

    单选题
    C3I system for Air Defense 即为防空C3I系统，下列哪一项不是其中之一：（）
    A

    指挥

    B

    控制

    C

    通信

    D

    侦察


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    Which of the following methods is normally used to control the temperature of air distributed from individual cooling coils in an air conditioning system using a chilled water circulation system?（）
    A

    A room thermostat activates an electric heater at each individual chilled air outlet when necessary

    B

    Varying the number of passes the air makes across the coils

    C

    Varying the temperature of the water through the coils

    D

    Varying the quantity of water flowing through the coils


    正确答案： B
    解析： 暂无解析

  • 第22题：

    单选题
    As a defense against air-pollution damage, many plants and animals _____ a substance to absorb harmful chemicals.
    A

    relieve

    B

    release

    C

    dismiss

    D

    discard


    正确答案： B
    解析：
    句意：作为对空气污染造成的伤害的一种抵御，许多动植物释放出一种物质来吸收有害的化学物质。release释放，放出。relieve减轻，减缓。dismiss解雇。discard舍弃，丢弃。

  • 第23题：

    单选题
    If an air compressor is used to supply air primarily to the combustion control system and other pneumatic controllers, the entire system is known as the （）.
    A

    control air system

    B

    forced draft air system

    C

    supply air system

    D

    ships service air system


    正确答案： A
    解析： 暂无解析

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