单选题On a large low-speed main propulsion diesel engine, lower main bearing wear is usually measured by using a/an （）A dial indicatorB outside caliperC bridge gaugeD tram rod

题目
单选题
On a large low-speed main propulsion diesel engine, lower main bearing wear is usually measured by using a/an （）
A

dial indicator

B

outside caliper

C

bridge gauge

D

tram rod

相似考题

1.In a main propulsion turbocharged diesel engine, the speed of the turbocharger varies according to the _____.A.governor droopB.speeder spring tensionC.fuel rack lagD.load on the engine

2.单选题The rate of cylinder lubricating oil metered to each cylinder of a large low-speed main propulsion diesel engine is （）A the same, whether at sea, or during maneuveringB adjusted during each hour of operation while at constant RPMC higher at sea than while maneuveringD lower at sea than while maneuvering

3.单选题Stating a large propulsion diesel engine using diesel fuel during cold weather conditions can be made easier by （）A increasing the quantity of starting airB increasing the lube oil pressureC heating the engine fuel supplyD heating the engine jacket water

4.The closing of the exhaust valves used on a modern, large, low-speed, main propulsion diesel engine may be directly provided by_______.A.large conical springsB.compressed air pressureC.hydraulic pressureD.exhaust gas pressure

更多“On a large low-speed main propulsion diesel engine, lower ma”相关问题

  • 第1题：

    单选题
    While underway, which of the following would be the FIRST step in reversing a direct reversing large, low-speed, main propulsion, diesel engine?（）
    A

    Manually trip the over-speed device

    B

    Interrupt the fuel flow to the engine

    C

    Disengage the safety interlock

    D

    Slide the camshaft to the neutral position


    正确答案： B
    解析： 暂无解析

  • 第2题：

    单选题
    The opening of an exhaust valve on a modem, large, low-speed, main propulsion diesel engine may be actuated by （）.
    A

    direct action of cam shaft

    B

    compressed air pressure

    C

    hydraulic “push rods”

    D

    direct action of the main piston moving down


    正确答案： A
    解析： 暂无解析

  • 第3题：

    单选题
    Mist detectors used on large low-speed main propulsion diesel engines monitor and check for the presence of （）.
    A

    fuel oil vapor at the sludge tank vent

    B

    unburned fuel vapors in the scavenge air receiver

    C

    lube oil vapors in the crank case

    D

    lube oil vapors in the engine room


    正确答案： C
    解析： 暂无解析

  • 第4题：

    单选题
    In order to start a large, low-speed, main propulsion diesel engine on high viscosity fuel after an extended shutdown, the （）
    A

    fuel must be preheated

    B

    intake air should be preheated

    C

    lube oil outlet temperature should be increased 20℃ above normal

    D

    none of the above


    正确答案： B
    解析： 暂无解析

  • 第5题：

    单选题
    Following the failure of one turbocharger on a large, crosshead, main propulsion diesel engine, fitted with multiple turbochargers, which of the following actions should be taken prior to further operation of the engine? （）
    A

    Blank off the exhaust gas inlet to the damaged turbocharger

    B

    Secure cooling and lubrication to the damaged turbocharger

    C

    Lock the rotor of the damaged turbocharger

    D

    All of the above


    正确答案： C
    解析： 暂无解析

  • 第6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7题：

    单选题
    A large, low-speed, main propulsion diesel engine uses sea water to directly cool the （）.
    A

    cylinder heads

    B

    exhaust valves

    C

    scavenging air

    D

    injectors


    正确答案： B
    解析： 暂无解析

  • 第8题：

    单选题
    If it becomes necessary to cutout an individual cylinder of a large, low-speed, main propulsion diesel engine, the fuel to that cylinder should be secured and its （）
    A

    fuel pump should be removed and all connections blanked off

    B

    cylinder oil feed rate should be increased slightly above that used at normal sea speed

    C

    cylinder oil feed rate should be reduced

    D

    cylinder oil feed rate should be increased to the maximum flow capable of the metering pump


    正确答案： B
    解析： 暂无解析

  • 第9题：

    单选题
    In a main propulsion turbocharged diesel engine, the speed of the turbocharger varies according to the （）
    A

    governor droop

    B

    speeder spring tension

    C

    fuel rack lag

    D

    load on the engine


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    An indication of an overloaded main propulsion diesel engine is （）
    A

    white smoke in the exhaust

    B

    high exhaust gas pyrometer readings

    C

    sparks in the exhaust

    D

    blue smoke in the exhaust


    正确答案： A
    解析： 暂无解析

  • 第11题：

    单选题
    Most large, low-speed, main propulsion diesel engines use duplex lube oil strainer to （）
    A

    decrease the time required between cleanings

    B

    removes all large and small foreign objects

    C

    ensure a positive flow of oil at all times

    D

    ensure that all lube oil has been treated twice


    正确答案： B
    解析： 暂无解析

  • 第12题：

    单选题
    Telescopic pipes to the piston of a large slow-speed main propulsion diesel engine are designed to prevent （）.
    A

    excessive crankcase pressure

    B

    excessive lube oil temperature

    C

    contamination of the lube oil by water

    D

    contamination of the cooling water by lube oil


    正确答案： C
    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
    The power developed by a large slow-speed main propulsion diesel engine is dependent upon the （）
    A

    quantity of air it takes in and retains in the cylinders during a given time period

    B

    proportion of trapped air that is utilized in the combustion process

    C

    thermodynamic efficiency of the engine cycle

    D

    all of the above


    正确答案： B
    解析： 暂无解析

  • 第15题：

    单选题
    Which of the conditions listed could cause the cylinder relief valves on a large, low-speed, propulsion diesel engine to lift?（）
    A

    Plugged injector nozzles

    B

    Excessive fuel injection

    C

    Very late injection timing

    D

    Incorrect crankshaft clearance


    正确答案： B
    解析： 暂无解析

  • 第16题：

    单选题
    During maneuvering operations for a direct reversing large, low-speed, main propulsion diesel engine, which of the following actions is used to stop the shaft from turning prior to reversing the engine rotation?（）
    A

    Flywheel inertia

    B

    Admission of starting air

    C

    The way of the vessel

    D

    securing of fuel to the cylinders


    正确答案： B
    解析： 暂无解析

  • 第17题：

    单选题
    Large, two-stroke/cycle, main propulsion, diesel engine cylinders can be successfully pressure charged during normal operation, by using the （）.
    A

    exhaust gas temperature system

    B

    exhaust load system

    C

    constant or pulse pressure system

    D

    constant volume system


    正确答案： B
    解析： 暂无解析

  • 第18题：

    单选题
    A large, low-speed, crosshead, main propulsion diesel engine using residual fuel oils must have a cylinder oil having a （）
    A

    low TBN value

    B

    high alkaline reserve

    C

    low flash point

    D

    high pour point


    正确答案： A
    解析： 暂无解析

  • 第19题：

    单选题
    Which of the listed types of starting systems is often used on large, low-speed, direct reversing, main propulsion diesel engines?（）
    A

    Electric

    B

    Hydraulic

    C

    Air

    D

    All of the above


    正确答案： A
    解析： 暂无解析

  • 第20题：

    单选题
    The closing of the exhaust valves used on a modern, large, low-speed, main propulsion diesel engine may be directly provided by （）.
    A

    large conical springs

    B

    compressed air pressure

    C

    hydraulic pressure

    D

    exhaust gas pressure


    正确答案： D
    解析： 暂无解析

  • 第21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

  • 第22题：

    单选题
    Which of the following conditions may need to be reduced when operating a large, low speed, main propulsion, diesel engine at low loads?（）
    A

    Injection pressures

    B

    Control air supply pressure

    C

    Cooling water flow through after-coolers

    D

    Lube oil temperature


    正确答案： D
    解析： 暂无解析

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