单选题Which of the following pumps are self-priming, and can deal with liquid from a level below the pump? （） (1) reciprocating (2) vane (3) gearA （1）onlyB （1）and（2）C （1），（2）and（3）D （2）and（3）

题目
单选题
Which of the following pumps are self-priming, and can deal with liquid from a level below the pump? （） (1) reciprocating (2) vane (3) gear
A

（1）only

B

（1）and（2）

C

（1），（2）and（3）

D

（2）and（3）

相似考题

1.Which of the following methods can move files in clear text and can be easily intercepted?()A.RSHB.SNMPC.FTPD.TELNET

2.Which of the following protocols can be found at the application layer?（）A、TelnetB、TCPC、SNMPD、UDP

3.Which of the following methods can move files in clear text and can be easily intercepted?（）A、RSHB、SNMPC、FTPD、TELNET

4.Which statement is TRUE concerning deep well self-priming pumps ________．A.When loading oil cargo，it is always loaded via the discharge line through to the pump until the tank is topped offB.Stripping systems are generally eliminated for the purposes of cargo handlingC.In recent years deep well pumps have become increasingly unpopular in product tankers and medium size crude shipsD.There is no danger of damaging the pump from overheating

更多“Which of the following pumps are self-priming, and can deal”相关问题

  • 第1题：

    To which of the following resources can a lock be applied?（）

    • A、Row
    • B、Alias
    • C、Bitmap
    • D、Column

    正确答案:A

  • 第2题：

    单选题
    Which of the following statements represents the advantage of rotary pumps as compared to reciprocating pumps?（）
    A

    The high discharge pressure of the rotary pumps permits a larger volume of fluid per unit time than the reciprocating pump

    B

    Rotary pumps are capable of pumping more fluid than reciprocating pumps of the same weight

    C

    Rotary pumps occupy only one-half the space of reciprocating pumps

    D

    Rotary pumps eliminate discharge slippage of the pumped liquid, while this does not hold true for a reciprocating pump


    正确答案： B
    解析： 暂无解析

  • 第3题：

    单选题
    The pumps employed on board ship can be divided into two main categories ie（） pumps and centrifugal pumps.
    A

    gear

    B

    nonpositive displacement

    C

    positive displacement

    D

    rotary


    正确答案： A
    解析： 暂无解析

  • 第4题：

    单选题
    Which of the following statements can NOT justify the high price that Toshiba pays in the current deal, according to the passage?
    A

    Pressure from other powerful rivals.

    B

    Prospects of development in the future.

    C

    Envisioned potential profits.

    D

    The high intrinsic value of the purchased corporation.


    正确答案： A
    解析：
    事实细节的找寻和判断。录音中提到东芝公司总裁对购买价格的看法是“…while the price might seem quite high, Toshiba had a lot of competition for the company and that the future growth and profit potential of the business made it the correct price”，可知虽然购买价格过于昂贵，但该公司面临大量的竞争，并且未来的发展和利润潜力也证实了这桩买卖还是合算的。分别对应选项A、B和C，而唯独没有提到选项D（被购买公司的巨大固有价值）的内容。

  • 第5题：

    单选题
    Which of the following operating features do displacement pumps bear if they are working under no-cavitation condition?（） (1) output is almost directly proportional to speed (2) they are self-priming (3) they will develop a discharged pressure equal to the resistance to be overcome, irrespective of speed
    A

    （1）and（2）

    B

    （2）and（3）

    C

    （1）and（3）

    D

    （1），（2）and（3）


    正确答案： A
    解析： 暂无解析

  • 第6题：

    单选题
    Which of the following can NOT describe the man?
    A

    Desperate

    B

    Thin

    C

    Miserable

    D

    Conspicuous


    正确答案： B
    解析：
    由文中描写男子的词语“haggard”、“the sadness in his dark eyes”、“with a certain bitterness in his eyes hopelessness in his form”分别标明这个男人憔悴，痛苦，绝望。D项“显眼的”在原文没有体现。

  • 第7题：

    单选题
    Which of the following pumps belongs to centrifugal pump?（）
    A

    Piston pump

    B

    Screw pump

    C

    Diffuser pump

    D

    Water-ring pump


    正确答案： B
    解析： 暂无解析

  • 第8题：

    单选题
    Which of the following types of hydraulic pumps would be used in a steering system?（）
    A

    Lobe

    B

    Screw

    C

    Radial piston

    D

    Volute


    正确答案： C
    解析： 暂无解析

  • 第9题：

    单选题
    When operating with a negative suction head, which of the following types of pumps will require priming?（）
    A

    Reciprocating

    B

    Centrifugal

    C

    Rotary

    D

    Gear


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    Which of the following pumps will most affect oily water separator performance and give the worst result?（）
    A

    reciprocating pump

    B

    vane pump

    C

    screw pump

    D

    centrifugal pump


    正确答案： B
    解析： 暂无解析

  • 第11题：

    单选题
    Which of the following pumps are self-priming, and can deal with liquid from a level below the pump? （） (1) reciprocating (2) rotary (3) centrifugal
    A

    （1）only

    B

    （1）and（2）

    C

    （1），（2）and（3）

    D

    （2）and（3）


    正确答案： B
    解析： 暂无解析

  • 第12题：

    单选题
    Positive displacement, helical gear pumps are well suited for pumping oil because （）
    A

    stuffing boxes eliminate the leakage problems usually associated with other gear pumps

    B

    it is not necessary to closely maintain design clearances with this pump

    C

    they are essentially self-priming and produce a high suction lift

    D

    these pumps are designed with extreme tooth angled


    正确答案： A
    解析： 暂无解析

  • 第13题：

    单选题
    Which of the following is the purpose of the second paragraph?
    A

    To show that school phobia can be cured.

    B

    To suggest a way to deal with school phobia.

    C

    To describe the cause of school phobia.

    D

    To present a typical case of school phobia.


    正确答案： C
    解析：
    文章首段提到school phobia的症状，接着第二段讲述了一个患学校恐惧症的孩子的例子，指出这个13岁的东京男孩已经1年多没去学校了，他住在一个黑暗的屋子里，并且比较暴力，曾经接受过精神方面的治疗，但会到家后他之前的症状又返回了，之后就再没去上学，因此D项符合题意。

  • 第14题：

    单选题
    Which one of the following information can not be found in engine room induction according to the passage?（）
    A

    special precautions to deal with heat

    B

    engine room safety procedures such as earmuffs, safety glasses, work clothes

    C

    emergency escapes

    D

    the location of safety equipment around the ship


    正确答案： C
    解析： 暂无解析

  • 第15题：

    单选题
    Which pump is the self-priming pump?（）
    A

    turbine

    B

    centrifugal

    C

    ejector

    D

    mixed flow


    正确答案： B
    解析： 暂无解析

  • 第16题：

    单选题
    Which of the following statements is/are true regarding hydraulic pumps in general? （）
    A

    Variable volumes can be obtained with gear pumps only by variation of the pump drive speed

    B

    A radial piston pump houses sliding pistons in a stationary cylinder block through which passes a rotating pintle or ported shaft

    C

    The amount of fluid displaced per revolution of an axial piston rotary pump is dependent on the angle formed between the cylinder block and valve plate

    D

    All of the above


    正确答案： B
    解析： 暂无解析

  • 第17题：

    单选题
    Which of the following pumps is used where a relatively high pressure and small capacity are required?（）
    A

    Volute pump

    B

    Diffuser pump

    C

    Regenerative pump

    D

    All of the above


    正确答案： A
    解析： 暂无解析

  • 第18题：

    单选题
    If the discharge valve is closed before the drive motor is stopped, which of the following types of pumps will most likely be damaged?（）
    A

    Centrifugal

    B

    Gear

    C

    Propeller

    D

    Turbine


    正确答案： A
    解析： 暂无解析

相关内容