单选题If a diesel engine were running at 20% overload with a smoky exhaust, you should（）A stop the engine immediately to prevent damageB increase lube oil pressureC slow the engine allowing it to gradually coolD decrease the cooling water it temperature to t

题目
单选题
If a diesel engine were running at 20% overload with a smoky exhaust, you should（）
A

stop the engine immediately to prevent damage

B

increase lube oil pressure

C

slow the engine allowing it to gradually cool

D

decrease the cooling water it temperature to the water jacket

相似考题

1.A sudden power loss from a turbocharged and after-cooled diesel engine is an indication of a/anA.turbocharger malfunction or failureB.crankcase exhauster overloadC.overload on the intercoolerD.obstruction in the engine cylinders

2.单选题The marine diesel engine is a type of diesel engine used on ships The （） of its operation is not very difficult to understand.A principleB principalC causeD case

3.单选题During the running of the diesel engine, if the supply of cooling water is interrupted or the temperature of cooling water out of the cylinder is too high, the duty engineer should （）A notify the duty officer, reduce the engine speed, take some measures to remove failuresB notify the duty officer and stop the engine immediately, find the cause and remove failuresC notify the C/ED notify the captain

4.A bypass line provided around a waste heat auxiliary boiler in a diesel engine exhaust system, may be used to avoid boiler ______.A.corrosion at low engine loadsB.erosion at high engine loadsC.overload at high engine loadsD.scaling at all exhaust temperatures

更多“If a diesel engine were running at 20% overload with a smoky”相关问题

  • 第1题：

    单选题
    A supercharged diesel engine when compared to a similar naturally aspirated diesel engine, will develop an increase in （）
    A

    ignition lag

    B

    engine horsepower

    C

    lube oil system pressure

    D

    specific fuel consumption


    正确答案： D
    解析： 暂无解析

  • 第2题：

    单选题
    If a single cylinder relief valve on a diesel engine lists frequently while the engine is running, the cause may be an （）
    A

    excessively late injection timing for each cylinder

    B

    incorrectly adjusted intake valve timing

    C

    incorrectly adjusted fuel injector

    D

    incorrectly adjusted intake valve clearance


    正确答案： A
    解析： 暂无解析

  • 第3题：

    单选题
    Incomplete combustion in a running diesel engine can cause piston rings to become stuck as a result of （）
    A

    residual carbon deposits

    B

    lube oil viscosity breakdown

    C

    uneven heat expansion of the rings

    D

    uneven heat expansion of the piston


    正确答案： B
    解析： 暂无解析

  • 第4题：

    单选题
    The size of the exhaust valve opening is （）
    A

    most critical in a four-stroke cycle diesel engine

    B

    most critical in a two-stroke/cycle diesel engine

    C

    most critical in a four-stroke/cycle diesel engine if it is turbocharged

    D

    of equal importance in a two-stroke/cycle diesel engine as in a four-stroke/cycle diesel engine


    正确答案： A
    解析： 暂无解析

  • 第5题：

    单选题
    The load limitation of governor should be reduced when ship navigating at sea, the main reason is to（）
    A

    prevent the diesel engine surging

    B

    prevent governor from being damaged because of swing

    C

    reduce the probability of the crank shaft being torsional vibrated and resonated

    D

    prevent the main engine being overload or overspeed


    正确答案： D
    解析： 暂无解析

  • 第6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7题：

    单选题
    During the diesel engine running, the water level of FW expansion tank should normally kept in the （） level of glass tube.
    A

    the highest

    B

    above 3/4

    C

    1/2-3/4

    D

    the lowest


    正确答案： A
    解析： 暂无解析

  • 第8题：

    单选题
    In a large, slow-speed, main propulsion diesel engine, which of the parts listed is under tension when the engine is running?（）
    A

    Bed plate

    B

    Column

    C

    Entablature

    D

    Tie rod


    正确答案： D
    解析： 暂无解析

  • 第9题：

    单选题
    If the action of the engine indicates that some of the cylinders are not firing, the ones affected may be determined by watching （）.
    A

    the bad smoke

    B

    the smoky exhaust

    C

    the exhaust temperature

    D

    the peak pressure


    正确答案： B
    解析： 暂无解析

  • 第10题：

    单选题
    If a four-stroke/cycle diesel engine is running at 1550 RPM, the speed of the camshaft will be（）.
    A

    525 RPM

    B

    775 RPM

    C

    1550 RPM

    D

    1800 RPM


    正确答案： B
    解析： 暂无解析

  • 第11题：

    单选题
    High lube oil temperatures developing in a diesel engine can result from（）
    A

    high oil pressure

    B

    excessive bearing end play

    C

    plugged oil control rings

    D

    engine overload


    正确答案： A
    解析： 暂无解析

  • 第12题：

    单选题
    The knock occurring when a cold diesel engine is started and continues while running at low speed, but stops when the engine reaches normal operating speed and temperature, is（）.
    A

    caused by retarded injection timing

    B

    caused by a mechanical defect in one cylinder

    C

    caused by high fuel injection pressures

    D

    normal for these conditions


    正确答案： B
    解析： 暂无解析

  • 第13题：

    单选题
    Starting a large low-speed propulsion diesel engine on diesel fuel during cold weather conditions, will be made easier by （）
    A

    increasing the quantity of starting air

    B

    increasing the lube oil pressure

    C

    heating the engine fuel supply

    D

    heating the engine coolant


    正确答案： A
    解析： 暂无解析

  • 第14题：

    单选题
    A dark exhaust from a running diesel engine can be caused by （）
    A

    late ignition

    B

    water in the fuel

    C

    high compression temperature

    D

    starting valve stuck open


    正确答案： A
    解析： 暂无解析

  • 第15题：

    单选题
    The most practical way of detecting an overload in one cylinder of an operating large, low-speed ,main propulsion diesel engine is to （）
    A

    check the cylinder exhausts for black smoke

    B

    listen for combustion knock in that cylinder

    C

    isolate each cylinder and inspect the injector

    D

    check the cylinder exhaust temperature frequently


    正确答案： C
    解析： 暂无解析

  • 第16题：

    单选题
    What is one effect of running a diesel engine at too cool a temperature? （）
    A

    Buildup of sludge in the lubricating system

    B

    Excessive fuel consumption

    C

    Severe heat stresses on mechanical parts

    D

    Foaming of the lubricating oil


    正确答案： A
    解析： 暂无解析

  • 第17题：

    单选题
    Proper lubrication of the main bearing is more easily obtained in a single acting four-stroke/cycle diesel engine than in a single acting two-stroke/cycle diesel engine because （）
    A

    bearing pressure in a four-stroke/cycle acting single diesel engine is continually reversed

    B

    bearing pressure in a two-stroke/cycle single acting diesel engine is continually reversed

    C

    the maximum bearing pressure is higher in a single acting two-stroke/cycle diesel engine

    D

    two-stoke/cycle diesel engines require more complicated lubrication piping


    正确答案： B
    解析： 暂无解析

  • 第18题：

    单选题
    What is the effect of heated intake air on a diesel engine? （）
    A

    Increases efficiency

    B

    Increases engine horsepower

    C

    Increases engine life

    D

    Reduces engine horsepower


    正确答案： C
    解析： 暂无解析

  • 第19题：

    单选题
    The purpose of the flywheel of a diesel engine is to （）.
    A

    counterbalance the crank throws on the crankshaft

    B

    keep the engine running smoothly between power stroke

    C

    provide a belt-driving surface for the operation of auxiliary machinery

    D

    prevent the engine from overspeeding


    正确答案： B
    解析： 暂无解析

  • 第20题：

    单选题
    During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.
    A

    the highest

    B

    above 3/4

    C

    1/2 -3/4

    D

    the lowest


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    A restricted air intake to a diesel engine may result in the engine （）.
    A

    failing to reach rated speed

    B

    knocking under maximum load

    C

    hunting or surging under light load

    D

    overspeeding and running away


    正确答案： C
    解析： 暂无解析

  • 第22题：

    单选题
    When running a large, low-speed, main propulsion diesel engine on heavy fuel, which of the following precautions should be observed when switching back over to diesel oil?（）
    A

    The diesel oil must never be allowed to mix with the heavy fuel

    B

    The temperature of the fuel from the pre–heater should be gradually reduced after switching over the three–way valve

    C

    The heating steam to the pre-heater should be secured as soon as the diesel fuel passes through the three-way valve

    D

    The heating steam must be secured before the diesel oil passes through the three-way valve


    正确答案： D
    解析： 暂无解析

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