单选题To reduce the weight of the reciprocating parts, pistons of high-speed engines are made considerably shorterThis results in （）A less piston slap and quieter runningB increased crankshaft bearing wearC slightly greater piston wearD decreased side pressu

题目
单选题
To reduce the weight of the reciprocating parts, pistons of high-speed engines are made considerably shorterThis results in （）
A

less piston slap and quieter running

B

increased crankshaft bearing wear

C

slightly greater piston wear

D

decreased side pressures

相似考题

1.To reduce the weight of the reciprocating parts, pistons of high-speed engines are made considerably shorterThis results in __________.A.less piston slap and quieter runningB.increased crankshaft bearing wearC.slightly greater piston wearD.decreased side pressures

2.Which lubricating oil additive is used in diesel engines to reduce the tendency(倾向)for sludge and varnish to form on the engine parts?A.Flash point improversB.Pour point improversC.InhibitorsD.Foam suppressors(抑制物)

3.The greatest strain，when lifting a load with the jumbo purchase，is on ______．A.all of the parts，dividing the load equallyB.the hauling part because it must absorb the frictional losses of all the sheavesC.the parts in the movable blockD.the standing part because it is directly connected to the weight

4.A global manufacturer of automobile parts wants to implement specialized voice applications to increase productivity and reduce the cost of overseas toll calls. Which Cisco solution best matches this business need?（）A.Digital subscriber line (DSL)B.Optical networkC.Wireless local-area network (WLAN)D.Internet Protocol (IP) telephony

更多“To reduce the weight of the reciprocating parts, pistons of”相关问题

  • 第1题：

    Addition of weight above the center of gravity of a vessel will ALWAYS ______.

    A.reduce initial stability

    B.increase righting moments

    C.increase GM

    D.cannot be determined


    正确答案：A
    在船舶重心上增加重量将总是减少初稳性高度。

  • 第2题：

    In order to reduce your wake in a narrow channel you should ______.

    A.apply enough rudder to counter the effect of the current

    B.change your course to a zigzag course

    C.reduce your speed

    D.shift the weight to the stern


    正确答案：C
    在狭水道中为了减少你船的伴流你应减速。

  • 第3题：

    汉译英：“毛重；净重；公量”，正确的翻译为：（）。
    A. gross weight ； clean weight ； dry weight B.total weight; clean weight; dry weight
    C. gross weight； net weight； conditioned weight D.total weight ； net weight ； conditioned weight


    答案：C
    解析：

  • 第4题：

    A global manufacturer of automobile parts wants to implement specialized voice applications to increase productivity and reduce the cost of overseas toll calls. Which Cisco solution best matches this business need?（）

    • A、Optical network
    • B、Digital subscriber line (DSL)
    • C、Internet Protocol (IP) telephony
    • D、Wireless local-area network (WLAN)

    正确答案:C

  • 第5题：

    单选题
    An advantage of aluminum pistons, when compared to cast iron pistons is （）.
    A

    greater high temperature strength

    B

    better heat conductivity

    C

    greater weight per cubic inch

    D

    increased resistance to wear


    正确答案： A
    解析： 暂无解析

  • 第6题：

    单选题
    The main moving parts of a diesel engine consist of the （） and the pistons.
    A

    bedplate, connecting rods

    B

    crankshaft, the connecting rods

    C

    frames, crossheads

    D

    crankshaft, the cylinder


    正确答案： B
    解析： 暂无解析

  • 第7题：

    单选题
    Pistons may be made in （） in order to keep the weight down for balancing purposes at high speed.
    A

    cast iron

    B

    forged steel

    C

    stainless steel

    D

    aluminum alloy


    正确答案： C
    解析： 暂无解析

  • 第8题：

    单选题
    Due to （） action of pistons some relative motion between parts in contact in the coolant supply and return system must occur.
    A

    reciprocating

    B

    rotating

    C

    running

    D

    removing


    正确答案： B
    解析： 暂无解析

  • 第9题：

    单选题
    The greatest strain，when lifting a load with the jumbo purchase，is on（）.
    A

    all of the parts，dividing the load equally

    B

    the hauling part because it must absorb the frictional losses of all the sheaves

    C

    the parts in the movable block

    D

    the standing part because it is directly connected to the weight


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    Pistons of marine medium speed diesel engines may be made of （） in order to keep the weight down for balancing purpose at high speed.
    A

    lead

    B

    forged steel

    C

    alloy steel

    D

    aluminum alloy


    正确答案： A
    解析： 暂无解析

  • 第11题：

    单选题
    Which lubricating oil additive is used in diesel engines to reduce the tendency for sludge and varnish to form on the engine parts?（）
    A

    Flash point improvers

    B

    Pour point improvers

    C

    Inhibitors

    D

    Foam suppressors


    正确答案： C
    解析： 暂无解析

  • 第12题：

    单选题
    Moving parts of machines and motor vehicles have to be _____ regularly to reduce friction.
    A

    lubricated

    B

    fabricated

    C

    embedded

    D

    dictated


    正确答案： B
    解析：
    句意：机器和机动车的运动零件要定期润滑以减少摩擦。lubricate润滑。fabricate编造。embed镶嵌。dictate口述。

  • 第13题：

    Addition of weight to a vessel will ALWAYS ______.

    A.reduce reserve buoyancy

    B.increase righting moments

    C.increase GM

    D.All of the above


    正确答案：A
    在船舶上加装重物将减小储备浮力。

  • 第14题：

    汉译英：“毛重；净重；公重”，正确的翻译为：（ ）。
    A. gross weight ； clean weight; dry weight B. total weight; clean weight ； dry weight
    C. gross weight ； net weight ； conditioned weight D. total weight ； net weight ； conditioned weight


    答案：C
    解析：

  • 第15题：

    如果想在Internet上搜索有关Detroit Pistons（底特律活塞）篮球队方面的信息，用下面那个关键词效果最好（）

    • A、"Detroit Pistons"
    • B、Detroit Pistons
    • C、basketball
    • D、Sports

    正确答案:A

  • 第16题：

    单选题
    In order to reduce your wake in a narrow channel you should（）.
    A

    apply enough rudder to counter the effect of the current

    B

    change your course to a zigzag course

    C

    reduce your speed

    D

    shift the weight to the stern


    正确答案： D
    解析： 暂无解析

  • 第17题：

    单选题
    The main purpose of warming the parts of the main engine is （）
    A

    to reduce heat stress

    B

    to reduce low temperature corrosion

    C

    to improve firing and starting performance

    D

    fuel saving


    正确答案： C
    解析： 暂无解析

  • 第18题：

    单选题
    The primary duty of lube oil is to reduce （） between the working parts of an engine.
    A

    power output

    B

    friction and wear

    C

    indicated pressure

    D

    rated horsepower


    正确答案： B
    解析： 暂无解析

  • 第19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20题：

    单选题
    A diesel engine with a combustion chamber located between the crowns of two pistons is known as a/an （）.
    A

    double-acting engine

    B

    opposed pistons engine

    C

    single-acting engine

    D

    horizontal acting engine


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    On modern ships, centrifugal pump with a self-primer has replaced reciprocating pump as bilge pump because（）
    A

    centrifugal pump is cheaper than reciprocating pump

    B

    the size of centrifugal pump with same capacity is smaller than that of reciprocating pump

    C

    centrifugal pump makes maintenance easier than reciprocating pump does

    D

    all of the above


    正确答案： B
    解析： 暂无解析

  • 第22题：

    单选题
    A global manufacturer of automobile parts wants to implement specialized voice applications to increase productivity and reduce the cost of overseas toll calls. Which Cisco solution best matches this business need?（）
    A

    Digital subscriber line (DSL)

    B

    Optical network

    C

    Wireless local-area network (WLAN)

    D

    Internet Protocol (IP) telephony


    正确答案： C
    解析： 暂无解析

  • 第23题：

    单选题
    Shifting weight aft in heavy weather will reduce the tendency to yaw，but may increase the tendency to（）.
    A

    be pooped

    B

    pitchpole

    C

    broach

    D

    squat


    正确答案： C
    解析： 暂无解析

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