单选题Diesel engine main and connecting rod precision bearings are made in halvesEach half exceeds one-half the bearing circumference by a small amountThe small amount is termed （）.A clearanceB crushC pitchD thrust

题目
单选题
Diesel engine main and connecting rod precision bearings are made in halvesEach half exceeds one-half the bearing circumference by a small amountThe small amount is termed （）.
A

clearance

B

crush

C

pitch

D

thrust

相似考题

1.Proper lubrication of the main bearings is more easily obtained in a single acting, four-stroke/cycle diesel engine than in a tow-stroke/cycle diesel engine because________.A.The direction of pressure on the journal in four-stroke engine is continuouslyB.positive feed lubricators are installed on all bearings of four-stroke engine, whereas as a splash feed system is used on tow-stroke engineC.four-stroke engines usually utilize a heavier grade of oil than tow-stroke enginesD.Low-stroke engines usually consume less lube oil than four-stroke engines

2.单选题Worn main bearings in a diesel engine can result in （）A decreased compression pressureB increased lube oil pressureC lower lube oil temperatureD excessive leakage past the piston rings

3.单选题The design of the connecting rod large end bearing is similar to that of the mainbearings Whats the meaning of "that" in the sentence above?（）A the connecting rodB large end bearingC the main bearingD the design

4.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

参考答案和解析
正确答案： C
解析： 暂无解析
更多“Diesel engine main and connecting rod precision bearings are”相关问题

  • 第1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2题：

    单选题
    On most modern diesel engines, the main and connecting rod bearings receive their lubricating oil by （）.
    A

    banjo feed

    B

    splash feed

    C

    gravity feed

    D

    pressure feed


    正确答案： B
    解析： 暂无解析

  • 第3题：

    单选题
    The highest loads applied to the diesel engine crankshaft main bearings are （）
    A

    axial loads

    B

    firing loads

    C

    inertia loads

    D

    centripetal loads


    正确答案： C
    解析： 暂无解析

  • 第4题：

    单选题
    You are inspecting the lower main precision bearings on a diesel engine.You observe that about half the thin Babbitt linings are of a milky white colourThis condition is caused by （）
    A

    large dirt particles in the oil supply

    B

    insufficient lubricating oil and overheating

    C

    normal wear

    D

    water contamination of the lube oil


    正确答案： A
    解析： 暂无解析

  • 第5题：

    单选题
    Precision engine bearing inserts are manufactured with a small portion of the bearing ends extending beyond the bearing housing or capsThe installation process of these bearings requires sufficient （）.
    A

    overlap

    B

    crush

    C

    lap or lead

    D

    protrusion


    正确答案： A
    解析： 暂无解析

  • 第6题：

    单选题
    An increase in crankcase pressure generally indicates（）
    A

    worn connecting rod bearings

    B

    worn engine cylinder liners

    C

    high cylinder firing pressure

    D

    stuck spring-loaded manhole covers


    正确答案： D
    解析： 暂无解析

  • 第7题：

    单选题
    The lower end of each piston rod is reduced in diameter to fit a bore in （）, this being secured to the piston rod by a nut.
    A

    the crank-web

    B

    the connecting rod

    C

    the main bearing

    D

    the cross-head


    正确答案： D
    解析： 暂无解析

  • 第8题：

    单选题
    On a medium-speed main propulsion diesel engine, the crank-pin or crank journal bearings receive lubricating oil from （）.
    A

    a spindle lubricator

    B

    an oil jet

    C

    internal splashing

    D

    drilled passages in the crankshaft


    正确答案： C
    解析： 暂无解析

  • 第9题：

    单选题
    For a main diesel engine the lube oil in the bearings is drawn from （）, usually located in the bedplate.
    A

    a gravity tank

    B

    a sump

    C

    a vessel

    D

    a bottle


    正确答案： A
    解析： 暂无解析

  • 第10题：

    单选题
    While inspecting the main bearings on a diesel engine you find impregnated dirt and scratches in the bearing surface you would, therefore, suspect that （）
    A

    the bearing had been overheated

    B

    water was present in the oil

    C

    the lube oil was not being properly filtered

    D

    the maximum allowable bearing pressure had been exceeded


    正确答案： D
    解析： 暂无解析

  • 第11题：

    单选题
    Lubricating oil systems for diesel engine journal bearings are usually lubricated by which of the following types of lubricating oil systems?（）
    A

    Splash

    B

    Gravity

    C

    Pressure

    D

    Bypass


    正确答案： C
    解析： 暂无解析

  • 第12题：

    单选题
    A connecting rod in a four-stroke/cycle diesel engine is subject to（）
    A

    tension load twice each crankshaft revolution

    B

    compression load during power and compression strokes

    C

    inertia load once every four crankshaft revolutions

    D

    bending loads at bottom and top dead center


    正确答案： C
    解析： 暂无解析

  • 第13题：

    单选题
    Which of the following operating conditions can occur when shims are removed from the joint between the foot of a marine type diesel engine connecting rod and the bearing box?（）
    A

    Decreased connecting rod bearing clearance

    B

    Increased connecting rod bearing clearance

    C

    Decreased compression ratio

    D

    Increased compression ratio


    正确答案： C
    解析： 暂无解析

  • 第14题：

    单选题
    The main function of tie rods in the construction of large, low speed diesel engines is to（）.
    A

    stiffen the bedplate in way of the main bearings to increase the engines longitudinal strength

    B

    accept most of the tensile loading that results from the firing forces developed during operation

    C

    mount the engine frame securely to the hull to prevent shaft coupling misalignment

    D

    connect the crosshead solidly to the piston rod


    正确答案： C
    解析： 暂无解析

  • 第15题：

    单选题
    Why a gearbox is needed in a ship driven by a medium-speed diesel engine?（）
    A

    To reduce the main engine speed

    B

    To increase the main engine speed

    C

    To govern the main engine speed

    D

    To fix the propeller shaft


    正确答案： A
    解析： 暂无解析

  • 第16题：

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

    The direction of pressure on the journal in four-stroke engine is continuously

    B

    positive feed lubricators are installed on all bearings of four-stroke engine, whereas as a splash feed system is used on tow-stroke engine

    C

    four-stroke engines usually utilize a heavier grade of oil than tow-stroke engines

    D

    Low-stroke engines usually consume less lube oil than four-stroke engines


    正确答案： B
    解析： 暂无解析

  • 第17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18题：

    单选题
    Connecting rods in a diesel engine are used to connect the （）.
    A

    engine to the bed

    B

    rocker arm to the camshaft

    C

    crankshaft to the gear train

    D

    piston to the crankshaft


    正确答案： C
    解析： 暂无解析

  • 第19题：

    单选题
    In a large, low-speed diesel engine the clearance between the piston crown and cylinder head is found to be excessiveIn order to correct for this, you should（）
    A

    build up the piston crown by metal spraying

    B

    build up the cylinder head by metal spraying

    C

    insert shims between the crankpin bearing box and the connecting rod foot

    D

    install a thinner head gasket


    正确答案： A
    解析： 暂无解析

  • 第20题：

    单选题
    The crankshaft of diesel engine is supported by （）.
    A

    tension stretch

    B

    tie rods

    C

    through bolts

    D

    main bearings


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    The design of （） is similar to that of the main bearing.
    A

    the block bearing

    B

    the camshaft bearing

    C

    the connecting rod small end bearing

    D

    the connecting rod large end bearing


    正确答案： A
    解析： 暂无解析

  • 第22题：

    单选题
    In some modern large diesel engines, which of the following is used as the support for the main bearings?（）
    A

    Bedplate

    B

    Block

    C

    Base

    D

    Sump


    正确答案： D
    解析： 暂无解析

相关内容