单选题（） is a machine by which electrical energy is transformed into mechanical energy.A An alternatorB An electric motorC A diesel engineD A main switchboard

题目
单选题
（） is a machine by which electrical energy is transformed into mechanical energy.
A

An alternator

B

An electric motor

C

A diesel engine

D

A main switchboard

相似考题

1.Loran-C is which type of system ________．A.Reflected electronB.Electrical radiationC.Quarterpoint electrical navigationD.Hyperbolic radio navigation

2.The energy（ ）by the chain reaction is transformed into heat.A.conveyed B.released C.transferred D.delivered

3.What’s corrosion？ It’s a chemical______in which metal is transformed into salt and oxides.A.react B.action C.reaction D.response

4.Which statement concerning reserve sources of energy for GMDSS is FALSE ________．A.While the ship is at sea，there must be available at all times a supply of electrical energy sufficient to operate the radio installations and to charge any batteries used as part of a reserve source of energyB.Both the VHF and MF/HF installations must be simultaneously suppliedC.A means of ensuring a continuous supply of electrical power must be provided to all GMDSS equipment that could be affected by an interruption in powerD.If a UPS or equivalent is used to supply power to the ship's GPS receiver or other source of positional information，a means must be provided to ensure the continuous supply of the information in the event of a failure to the ship's main or emergency source of power

更多“（） is a machine by which electrical energy is transformed in”相关问题

  • 第1题：

    Which of the following standard symbols signifies that a packaged item was produced using hazardous materials industry guidelines？（）

    • A、Energy Star
    • B、Energy Star 2.0
    • C、PCI-E
    • D、RoHS

    正确答案:D

  • 第2题：

    When using a mksysb and base media to clone a system， which of the following will cause the installation to fail（）

    • A、mksysb made on a single processor machine but is being installed on a multiple processor machine， no editing of the image.data file
    • B、mksysb made on machine with mirrored rootvg and new machine only has one disk in rootvg， no editing of the image.data file
    • C、mksysb made on a machine with 32GB of RAM but being installed on a machine with only 8GB of RAM
    • D、mksysb made on a machine with virtual Ethernet adapter but being installed on a machine which only has a physical Ethernet adapter

    正确答案:B

  • 第3题：

    单选题
    Which of the following statements concerning energy is correct?（）
    A

    Energy can be created or destroyed

    B

    Energy may not be transformed

    C

    The total quantity of energy in the universe is always the same

    D

    None of the above


    正确答案： D
    解析： 暂无解析

  • 第4题：

    单选题
    Which of the following statements is true according to the passage?
    A

    Oil energy has been popular with the manufacturing industry.

    B

    Solar energy is too expensive for family use at present.

    C

    Wind energy is much used in plateaus.

    D

    Water energy is widely used in costal regions.


    正确答案： C
    解析：
    录音开头便指出“世界上数以百万的人都想用太阳能来为房屋供暖和使用家电”，接着提到“But the cost of doing so puts it out of the question”，可知对于家庭来说使用太阳能的成本过高因此无法实现。

  • 第5题：

    单选题
    Which statement concerning reserve sources of energy for GMDSS is FALSE（）.
    A

    While the ship is at sea，there must be available at all times a supply of electrical energy sufficient to operate the radio installations and to charge any batteries used as part of a reserve source of energy

    B

    Both the VHF and MF/HF installations must be simultaneously supplied

    C

    A means of ensuring a continuous supply of electrical power must be provided to all GMDSS equipment that could be affected by an interruption in power

    D

    If a UPS or equivalent is used to supply power to the ship's GPS receiver or other source of positional information，a means must be provided to ensure the continuous supply of the information in the event of a failure to the ship's main or emergency source of power


    正确答案： D
    解析： 暂无解析

  • 第6题：

    单选题
    A switchboard, for a AC electrical distribution system, will be provided with which of the following components （）.
    A

    Frequency meter

    B

    Ammeter

    C

    Voltmeter

    D

    All of the above


    正确答案： A
    解析： 暂无解析

  • 第7题：

    单选题
    （） is a machine by which electrical energy is transformed into mechanical energy.
    A

    An alternator

    B

    An electric motor

    C

    A diesel engine

    D

    A main switchboard


    正确答案： C
    解析： 暂无解析

  • 第8题：

    单选题
    Which of the following terms could be applied to the simple definition the energy of motion?（）
    A

    Electrical energy

    B

    Thermal energy

    C

    Potential energy

    D

    Kinetic energy


    正确答案： C
    解析： 暂无解析

  • 第9题：

    单选题
    Which of the electrical properties listed will always be the same for each component in a parallel circuit?（）
    A

    Impedance

    B

    Current

    C

    Resistance

    D

    Voltage


    正确答案： B
    解析： 暂无解析

  • 第10题：

    单选题
    Which information is required to get the feature activation codes（）
    A

    machine serial number， model， and machine signature

    B

    model， disk size， and machine serial number

    C

    model， Storage Managerversion， and machine signature

    D

    model， WWNN， and machine serial number


    正确答案： D
    解析： 暂无解析

  • 第11题：

    单选题
    Energy losses due to （） occur in every machine.
    A

    speed

    B

    friction

    C

    impact

    D

    atmosphere


    正确答案： C
    解析： 暂无解析

  • 第12题：

    单选题
    An electrical appliance company has submitted a new model of washing machine for stress and durability testing. After the conventional round of tests, 26 of the 90 machines tested no longer functioned. Observing these results, the company determined that the washing machine model was acceptable for the consumer market.　 Which of the following, if true, most strongly supports the company’s decision regarding the washing machine?
    A

    When the number one rated washing machine was submitted for stress and durability testing, 96 out of 100 machines were still functioning at the end of the test.

    B

    Because of the extreme stress of the testing process, any model that has more than two-thirds of its machines functioning at the end of the test process is considered sufficiently durable for the consumer market.

    C

    Most consumers will tolerate a washing machine that functions only 64 times out of 90 attempts.

    D

    Although the model tested is less durable than other models on the market, its projected price is considerably lower than that of the most durable models.

    E

    The electrical failure that brought down most of the 26 washing machines that ceased functioning could probably be avoided if the machine were redesigned.


    正确答案： A
    解析：
    该公司的产品不合格率为26/90，小于1/3，故B项最能支持公司的决定，所以本题选B项。

  • 第13题：

    Which connection type is available on a virtual switch?（）

    • A、service console port
    • B、ESX machine port group
    • C、virtual machine port group

    正确答案:A

  • 第14题：

    Which information is required to get the feature activation codes（）

    • A、machine serial number， model， and machine signature
    • B、model， disk size， and machine serial number
    • C、model， Storage Managerversion， and machine signature
    • D、model， WWNN， and machine serial number

    正确答案:A

  • 第15题：

    单选题
    （）on board ship are used to control and distribute the electrical energy generated by generators.
    A

    Governors

    B

    Alternators

    C

    Blackboards

    D

    Switchboards


    正确答案： D
    解析： 暂无解析

  • 第16题：

    单选题
    Since heat will not flow freely from a body at a （） temperature to another at a （） temperature, it is necessary to expend mechanical work, heat, or electrical energy from an external source to achieve refrigeration.
    A

    lower；higher

    B

    shallower；deeper

    C

    larger；smaller

    D

    higher；lower


    正确答案： C
    解析： 暂无解析

  • 第17题：

    单选题
    Which of the listed devices is used to measure pressure and convert it to an electrical signal?（）
    A

    Transducer

    B

    Reducer

    C

    Transformer

    D

    Rectifier


    正确答案： C
    解析： 暂无解析

  • 第18题：

    单选题
    Which of the following statements represents the FIRST precaution to be taken prior to working on any installed electrical component （）
    A

    Wear rubber gloves and boots

    B

    Use only approved non-conducting tools

    C

    Ground the case of the machine before beginning any repairs

    D

    Open the supply circuits and tag the switches


    正确答案： B
    解析： 暂无解析

  • 第19题：

    单选题
    Which connection type is available on a virtual switch?（）
    A

    service console port

    B

    ESX machine port group

    C

    virtual machine port group


    正确答案： A
    解析： 暂无解析

  • 第20题：

    单选题
    The source of energy fitted in GMDSS complying vessels must be（）.
    A

    the main source of energy

    B

    emergency source of electrical power

    C

    the reserve source of energy

    D

    all of above


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    Which of the following forms of energy is demonstrated through the process of combustion?（）
    A

    Chemical energy

    B

    Mechanical energy

    C

    Thermal energy

    D

    Electrical energy


    正确答案： C
    解析： 暂无解析

  • 第22题：

    单选题
    Complete maintenance of electrical motors should include periodic checks for machine （）
    A

    vibration

    B

    watertight integrity

    C

    speed droop

    D

    reactive power


    正确答案： B
    解析： 暂无解析

  • 第23题：

    单选题
    Which of the following centrifugal pump components converts the liquid kinetic energy of velocity to the potential energy of pressure?（）
    A

    Impeller

    B

    Electric motor

    C

    Volute

    D

    Eye


    正确答案： C
    解析： 暂无解析

  • 第24题：

    单选题
    A transformer in an electric circuit serves to （）
    A

    generate its own electrical power

    B

    transform electrical energy into mechanical energy

    C

    increase or decrease circuit voltage as required

    D

    convert AC current to DC current


    正确答案： D
    解析： 暂无解析

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