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单选题If you were inspecting the valve springs on an auxiliary diesel engine, your best indication of impending spring failure would be （）A a glazed surface on the springB nicks in the protective coatingC a build up of sludge depositsD cracks in the surface

题目
单选题
If you were inspecting the valve springs on an auxiliary diesel engine, your best indication of impending spring failure would be （）
A

a glazed surface on the spring

B

nicks in the protective coating

C

a build up of sludge deposits

D

cracks in the surface of the spring

相似考题

1.Are you still here? You were here half an hour ago. Who( )for?A、were you waitingB、are you waitingC、did you waitD、do you wait

2.Elephants would( )if men were allowed to shoot as many as they wished.A. die downB．die outC．die awayD．die off

3.The fuel oil supply system to an automatic auxiliary boiler, will automatically shutdown if the boiler ______.A.steam demand is highB.salinity is highC.safety valve simmers(爆发)D.burner flame is extinguished

4.Springs in fuel injectors will become not strong enough to work because______.A.the injector opens at a lower pressure than designedB.the needle valve and seat wear outC.the nozzle holes wear outD.long time in use

更多“If you were inspecting the valve springs on an auxiliary die”相关问题

  • 第1题：

    Which options must you configure while performing an automated Tablespace Point-in-Time Recovery (TSPITR) by using Recovery Manager (RMAN)?（）

    • A、New channels for restore and recovery tasks
    • B、New name for the data files of the tablespace
    • C、Auxiliary name for the data files of the tablespace
    • D、Auxiliary destinations for an auxiliary set of data files

    正确答案:D

  • 第2题：

    单选题
    After you enter Thimble Shoal Channel，you will alter course to pass between Trestle “A” and “B”. Which channel should you use?（）
    A

    Thimble Shoal Main Channel or the South Auxiliary Channel

    B

    Any of the channels but keep to the right hand side

    C

    The South Auxiliary Channel

    D

    Thimble Shoal Main Channel


    正确答案： D
    解析： 暂无解析

  • 第3题：

    单选题
    The（） is fitted in pair one is the main valve, the other the auxiliary or standby.
    A

    main stem stop valve

    B

    auxiliary steam stop valve

    C

    feed check or control valve

    D

    blow down valve


    正确答案： B
    解析： 暂无解析

  • 第4题：

    单选题
    If a centrifugal bilge pump were continually operated with the discharge valve closed the （）.
    A

    motor overload would open

    B

    relief valve would open

    C

    pump would eventually overheat

    D

    motor would overheat


    正确答案： C
    解析： 暂无解析

  • 第5题：

    单选题
    If a refrigeration crankcase compressor were short cycling on the low pressure cutout switch, the cause might be that the （）.
    A

    system was overcharged with refrigerant

    B

    system was low on refrigerant

    C

    suction valves were leaking slightly

    D

    relief valve was leaking slightly


    正确答案： D
    解析： 暂无解析

  • 第6题：

    单选题
    The purpose of the purge valve at the top of the condenser in a refrigerating system is to（）
    A

    remove any air that may accumulate in the system

    B

    take out unpleasant fumes from the refrigerant

    C

    vent off excess refrigerant in an emergency

    D

    permit opening the refrigerating system for cleaning and inspecting


    正确答案： D
    解析： 暂无解析

  • 第7题：

    单选题
    If you were inspecting the valve springs on an auxiliary diesel engine, your best indication of impending spring failure would be （）
    A

    a glazed surface on the spring

    B

    nicks in the protective coating

    C

    a build up of sludge deposits

    D

    cracks in the surface of the spring


    正确答案： C
    解析： 暂无解析

  • 第8题：

    单选题
    Exhaust valve openings in a diesel engine cylinder head are made as large as practical to （）
    A

    increase back pressure during the exhaust process

    B

    facilitate periodic replacement of the valves

    C

    reduce the pumping loss associated with scavenging

    D

    reduce tension on valve springs


    正确答案： A
    解析： 暂无解析

  • 第9题：

    单选题
    Broken intake valve springs on one cylinder of a diesel engine can cause the engine to （）
    A

    Over speed

    B

    fire improperly

    C

    lose oil pressure

    D

    overheatrapidly


    正确答案： D
    解析： 暂无解析

  • 第10题：

    单选题
    If an auxiliary diesel engine frequently stalls, the trouble may be caused by （）
    A

    low exhaust back pressure

    B

    air in the fuel system

    C

    gasket blow-by or leakage

    D

    incorrect assembly of idler springs


    正确答案： C
    解析： 暂无解析

  • 第11题：

    单选题
    If a centrifugal pump were continually operated with the discharge valve closed, the （）.
    A

    motor controller overload would open

    B

    pump would eventually overheat

    C

    relief valve would continuously cycle open

    D

    motor would overheat


    正确答案： D
    解析： 暂无解析

  • 第12题：

    单选题
    While inspecting the steering system at sea, you should check for （）.
    A

    air bubbles in the sight glass

    B

    any leaks in the system

    C

    over-travel in the rudder angle indicator

    D

    lost motion in the rams


    正确答案： B
    解析： 暂无解析

  • 第13题：

    单选题
    If a refrigeration system compressor crankcase is sweating, you should （）.
    A

    add refrigerant to the system

    B

    adjust the thermal expansion valve to the proper setting

    C

    adjust the float valve to the proper holding pressure

    D

    open the hand expansion valve


    正确答案： A
    解析： 暂无解析

  • 第14题：

    单选题
    White smoke issuing from the exhaust of an auxiliary diesel engine valve opening （）
    A

    the engine is overloaded

    B

    the engine is cold

    C

    there is too much lube oil in the cylinders

    D

    the turbocharger is fouled


    正确答案： D
    解析： 暂无解析

  • 第15题：

    单选题
    As to the low speed diesel engine, if you want to change the coolant flow for a certain cylinder, you can regulate （）.
    A

    the inlet valve

    B

    the outlet valve

    C

    both the inlet valve and the outlet valve

    D

    the pump inlet valve


    正确答案： C
    解析： 暂无解析

  • 第16题：

    单选题
    If a refrigeration compressor were short cycling on the low pressure cutout switch, the probable cause for this might be the （）.
    A

    system was overcharged with refrigerant

    B

    high pressure switch was improperly adjusted

    C

    expansion valve strainers were fouled

    D

    suction valves were leaking slightly


    正确答案： B
    解析： 暂无解析

  • 第17题：

    单选题
    At 0845，you are approaching the entrances to Thimble Shoal Channel. What channel must you use?（）
    A

    The South Auxiliary Channel since your draft is less than 25 feet (7.6 meters)，and you are not a passenger vessel

    B

    The South Auxiliary Channel or Thimble Shoal Channel，but you must remain on the right hand side of the main channel

    C

    The North Auxiliary Channel since you are going to turn to a northerly heading near buoy 12

    D

    You are not permitted to use any of the channels，but must remain outside the buoyed channel line


    正确答案： B
    解析： 暂无解析

  • 第18题：

    单选题
    Excessive valve lash in an auxiliary diesel engine will cause the valves to open（）
    A

    later and close sooner

    B

    sooner and close later

    C

    sooner and close sooner

    D

    later and close later


    正确答案： D
    解析： 暂无解析

  • 第19题：

    单选题
    The（） is a smaller valve fitted in the auxiliary steam supply line, and is usually of the non-return type.
    A

    main stem stop valve

    B

    auxiliary steam stop valve

    C

    feed check or control valve

    D

    blow down valve


    正确答案： A
    解析： 暂无解析

  • 第20题：

    单选题
    When there is a flame failure in an automatically fired auxiliary boiler, the （）.
    A

    air supply is shut off

    B

    fuel supply is shut off

    C

    water supply is shut off

    D

    safety valve lifts


    正确答案： A
    解析： 暂无解析

  • 第21题：

    单选题
    Diesel engine valve springs function to （）
    A

    hold the valves open

    B

    keep the valves off their seats until the exhaust stroke is completed

    C

    close the valves

    D

    open inlet valves when the air injection cycle begins


    正确答案： C
    解析： 暂无解析

  • 第22题：

    单选题
    To add refrigerant to the high side of an air conditioning system, you should introduce the refrigerant through the （）.
    A

    discharge service valve as a vapor

    B

    suction service valve as a liquid

    C

    charging valve as a liquid

    D

    condenser purge valve as a vapor


    正确答案： C
    解析： 暂无解析

  • 第23题：

    单选题
    A loud clicking noise from the valve compartment of an operating diesel engine would indicate（）
    A

    worn valve seats

    B

    worn main bearing

    C

    excessive valve clearance

    D

    weak rocker arm springs


    正确答案： D
    解析： 暂无解析

  • 第24题：

    单选题
    The major difference between the discharge and suction valves installed in most low pressure, reciprocating air compressors is that（）
    A

    one valve seats upwards, while the other seats downwards

    B

    the reed valves used on the discharge are made substantially thicker and heavier than the suction valves

    C

    the suction valve springs exert a greater tension than the discharge valve springs

    D

    the discharge valve springs exert a greater tension than the suction valve springs


    正确答案： A
    解析： 暂无解析

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