单选题The main purpose of starting the diesel engine on air briefly is（）A to inspect if the cylinder has the water leakageB to expel out the residual water/gas/oil from the cylinderC to check if fuel supply is normalD A and B

题目
单选题
The main purpose of starting the diesel engine on air briefly is（）
A

to inspect if the cylinder has the water leakage

B

to expel out the residual water/gas/oil from the cylinder

C

to check if fuel supply is normal

D

A and B

相似考题

1.Vessels having main engines arranged for air starting are to be provided with at least__.A.one automatic drain serving both containersB.two air starting containers of approximately equal sizeC.one control air container and one starting air containerD.one additional means of starting the main engine

2.In an operating diesel engine, which of the following conditions is an indication of a leaking air starting valve?A.Noise coming from that air starting valveB.Continuous operation of the starting air compressorC.Zero air pressure in the air starting systemD.Overheated starting air pipe to the cylinder head

3.单选题Vessels having main engines arranged for air starting are to be provided with at least （）A one automatic drain serving both containersB two air starting containers of approximately equal sizeC one control air container and one starting air containerD one additional means of starting the main engine

4.Before "stand by" is rung on the engine telegraph, it is usual to give the main diesel engine a brief trial ahead and astern.A.with powerB.on powerC.with airD.on air

更多“The main purpose of starting the diesel engine on air briefl”相关问题

  • 第1题：

    单选题
    The starting of a marine diesel engine is generally carried out with the assistance of （）.
    A

    compressed air

    B

    electricity

    C

    hydraulic oil

    D

    compressing air


    正确答案： A
    解析： 暂无解析

  • 第2题：

    单选题
    By far the greatest use is for diesel engine starting using air pressure of 25 bar or more provided by （）.
    A

    rotary compressors

    B

    reciprocating compressors

    C

    centrifugal compressors

    D

    screw compressors


    正确答案： B
    解析： 暂无解析

  • 第3题：

    单选题
    When an air started, four-stroke/cycle diesel engine is being cranked, the starting air is admitted to each cylinder during what would normally be the（）
    A

    intake stroke

    B

    compression stroke

    C

    power stroke

    D

    exhaust stroke


    正确答案： A
    解析： 暂无解析

  • 第4题：

    单选题
    A diesel engine is turned at normal cranking speed and no ignition occursThis could be the result of （）
    A

    low lube oil temperature

    B

    low starting air temperature

    C

    air bubbles in the fuel oil system

    D

    water in the starting air system


    正确答案： A
    解析： 暂无解析

  • 第5题：

    单选题
    If you are unable to stop a diesel engine by any other means，you should（）.
    A

    discharge a CO2 extinguisher in the air inlet

    B

    pull off the distributor cap

    C

    secure the jacket water

    D

    secure the starting air supply valve


    正确答案： A
    解析： 暂无解析

  • 第6题：

    单选题
    Cold weather starting of a diesel engine may be made easier by（）
    A

    decreasing the compression ratio

    B

    using a special fuel having a high ignition temperature

    C

    increasing the starting air supply

    D

    heating the jacket water


    正确答案： C
    解析： 暂无解析

  • 第7题：

    单选题
    Prior to starting, the purpose of turning over a main propulsion diesel engine with the cylinder test cocks open, is to （）
    A

    test the starting system

    B

    remove condensation from the cylinders

    C

    check the compression

    D

    check for proper lube oil pressure


    正确答案： C
    解析： 暂无解析

  • 第8题：

    单选题
    The purpose of compressing the air within the cylinder of a diesel engine is to （）
    A

    produce the heat for ignition

    B

    decrease injection lag

    C

    increase ignition delay

    D

    aid in exhausting burnt gases


    正确答案： C
    解析： 暂无解析

  • 第9题：

    单选题
    When the diesel is stopped, which of the following items is wrong?（）
    A

    keep all systems in normally running

    B

    the main engine is stand-by

    C

    shut off the starting air bottle outlet valve

    D

    pay attention to the changes of the system parameters


    正确答案： D
    解析： 暂无解析

  • 第10题：

    单选题
    The highest pressure in a diesel engine cylinder normally occurs （）.
    A

    at TDC

    B

    before TDC

    C

    after TDC

    D

    during air starting


    正确答案： A
    解析： 暂无解析

  • 第11题：

    单选题
    A six-cylinder, two-stroke/cycle diesel engine is fitted with a rotary distributing air starting systemThe speed of the rotating distributor disc is （）
    A

    one-half engine speed

    B

    the same as engine speed

    C

    twice engine speed

    D

    four times engine speed


    正确答案： B
    解析： 暂无解析

  • 第12题：

    单选题
    The timing of diesel engine air starting valves is controlled by（）
    A

    the air start valve timing gears and rods

    B

    a cylinder check valve

    C

    individual cams and valve gear

    D

    an air manifold poppet valve


    正确答案： D
    解析： 暂无解析

  • 第13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14题：

    单选题
    Diesel engine starting difficulties due to cold intake air temperatures, can be overcome by using a/an（）
    A

    increase in starting air pressure

    B

    increase in lube oil viscosity

    C

    compression expansion device

    D

    jacket water heater


    正确答案： A
    解析： 暂无解析

  • 第15题：

    单选题
    Which of the following methods is used to prevent throttling of compressed air through the diesel engine air starting valves?（）
    A

    Holding the valve open for a long period

    B

    Increasing the starting air pressure used

    C

    Opening the stating air valve quickly

    D

    Reducing the starting air valve size


    正确答案： D
    解析： 暂无解析

  • 第16题：

    单选题
    In the starting process of a diesel engine, the main object is to attain the compression conditions sufficient to （）
    A

    turn the flywheel

    B

    reduce friction

    C

    overcome inertia

    D

    ignite the fuel


    正确答案： B
    解析： 暂无解析

  • 第17题：

    单选题
    When attempting to start a main propulsion diesel engine, the engine, the engine turns at the proper speed but will not startYou should check the（）
    A

    starting air pressure

    B

    scavenge air pressure

    C

    over-speed trip

    D

    banjo oiler line


    正确答案： B
    解析： 暂无解析

  • 第18题：

    单选题
    A large two-stroke/cycle direct reversing diesel engine is to be reversedPrior to the admission of starting air you must （）
    A

    line up the engine fore restarting with light diesel oil

    B

    reposition the fuel injection cam

    C

    change the intake and exhaust valve cam positions

    D

    place the starting cam in the intermediate position


    正确答案： C
    解析： 暂无解析

  • 第19题：

    单选题
    A two-stroke/cycle diesel engine requires less starting air than a four-stroke/cycle diesel engine, of equal displacement, because the two-stroke/cycle diesel engine（）
    A

    has little or no internal friction

    B

    has a lower effective compression ratio

    C

    operates with scavenge air under a positive pressure

    D

    operates without energy absorbing intake and exhaust strokes


    正确答案： D
    解析： 暂无解析

  • 第20题：

    单选题
    When starting air is admitted, a diesel engine turns over very slowly without firingThe cause may be （）
    A

    an obstruction in an cylinder

    B

    water accumulation in some engine cylinders

    C

    low starting air pressure

    D

    low scavenge air pressure


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    In an operating diesel engine, which of the following condition is an indication of a leaking air starting valve?（）
    A

    noise coming from that air starting valve

    B

    continuous operation of the starting air compressor

    C

    zero air pressure in the air starting system

    D

    overheated starting air pipe to the cylinder head


    正确答案： B
    解析： 暂无解析

  • 第22题：

    单选题
    The diesel engine must be started before it can run by it self For this purpose （） has to be used.
    A

    a starting system

    B

    the starting air

    C

    a starting operation

    D

    A, B and C


    正确答案： C
    解析： 暂无解析

  • 第23题：

    单选题
    The purpose of the flywheel is to （）
    A

    provide energy to operate the engine between power impulses

    B

    neutralize the primary inertia force of the crankshaft

    C

    reduce the shock of starting loads on the main bearings

    D

    prevent the engine from operating at critical speed


    正确答案： D
    解析： 暂无解析

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