Which of the following problems may be encountered by using an oil having a viscosity higher than that specified for an operating hydraulic system?A.External seal leakageB.Hunting due to fast responseC.Hydraulic oil film breakdownD.Increased power consump

题目

Which of the following problems may be encountered by using an oil having a viscosity higher than that specified for an operating hydraulic system?

A.External seal leakage

B.Hunting due to fast response

C.Hydraulic oil film breakdown

D.Increased power consumption

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1.(c) Discuss the practical problems that may be encountered in the implementation of an activity-based systemof product cost management. (5 marks)

2.Which of the following represents the significance the fuel oil cetane number?A.The cetane number has no affect on injection lagB.The cetane number is an indication of the fuel's viscosityC.Ignition lag is reduced with fuels having a high cetane numberD.The cetane number is of little significance in the combustion process

3.Oil oxidation as a result of excessively high lube oil temperature, is harmful to a diesel engine BecauseA.oil foaming will always occurB.large quantities of oil are consumedC.lube oil viscosity is always decreasedD.corrosive by-products are usually formed

4.A diesel engine exposed to widely varying ambient temperatures should use to a lubricating oil with .A.a high viscosity indexB.a low viscosity indexC.neutralize acidsD.resist oxidation at high temperatures

更多“Which of the following problems may be encountered by using an oil having a viscosity high ”相关问题

  • 第1题：

    Which of the following statements is correct regarding an oil with a high viscosity index?

    A.A large change of viscosity occurs with a minor change in temperature

    B.No change in viscosity occurs with any change in temperature

    C.Very little change in viscosity occurs with a significant change in temperature

    D.The viscosity of the oil increases with an increase in temperature


    正确答案：C

  • 第2题：

    Which of the following may better check students' ability of using a grammatical struc-ture?

    A．Having them work out the rule.
    B．Having them give some examples.
    C．Having them explain the meaning.
    D．Having them explain the structure.

    答案：B
    解析：
    考查语法教学技能。此题是问：下列哪一项可以更好地检测学生运用语法结构的能力 A项意为“让他们找出规律”．B项意为“让他们给出一些例子”，C项意为“让他们解释含义”，D项意为“让他们说明结构”。通过让学生给出一些相同语法结构的例句，可以更准确地判断出他们对于该句法结构的把握。故选B。

  • 第3题：

    单选题
    The adverse effects of burning high sulfur fuel can be compensated for by using a cylinder oil having sufficient（）
    A

    dispersant additives

    B

    floc point

    C

    alkalinity additives

    D

    ignition quality


    正确答案： C
    解析： 暂无解析

  • 第4题：

    单选题
    An important consideration in selecting a lubricating oil for use in a refrigeration compressor is for the oil to （）
    A

    have a high viscosity index

    B

    mix readily with refrigerant

    C

    have a high freezing point

    D

    have a low pour point


    正确答案： A
    解析： 暂无解析

  • 第5题：

    单选题
    Which of the problems listed represents the major difficulty encountered with thermal expansion valve operation?（）
    A

    Lube oil passing through the system

    B

    Moisture or foreign matter collecting at the valve seat and orifice

    C

    Variable spring tension caused by the changing temperature

    D

    Frost on the liquid line


    正确答案： B
    解析： 暂无解析

  • 第6题：

    单选题
    Lube oil filters remove contaminants more efficiently if the oil being filtered is （）.
    A

    under high pressure

    B

    under low pressure

    C

    heated to reduce viscosity

    D

    cooled to increase viscosity


    正确答案： A
    解析： 暂无解析

  • 第7题：

    单选题
    A diesel engine exposed to widely varying ambient temperatures should use to a lubricating oil with （）
    A

    a high viscosity index

    B

    a low viscosity index

    C

    neutralize acids

    D

    resist oxidation at high temperatures


    正确答案： D
    解析： 暂无解析

  • 第8题：

    单选题
    Cylinder oil is a high viscosity mineral oil, with a （） machined to the anticipated sulfur content of the fuel.
    A

    TAN

    B

    TBN

    C

    SAN

    D

    SBN


    正确答案： A
    解析： 暂无解析

  • 第9题：

    单选题
    Which of the following statements is correct concerning the viscosity of lubricating oil?（）
    A

    Viscosity will increase as temperature increases

    B

    Viscosity is a measure of a fluid s internal resistance to flow

    C

    Viscosity will decrease as temperature decreases

    D

    Viscosity is not dependent on temperature


    正确答案： B
    解析： 暂无解析

  • 第10题：

    单选题
    Which of the following problems may occur when using fuel oil with a high sulphur content?（）
    A

    Injection lag

    B

    Lube oil dilution

    C

    Pre-ignition

    D

    Corrosion


    正确答案： B
    解析： 暂无解析

  • 第11题：

    多选题
    A server is having problems accessing its presented storage on a SAN.  Which of the following could be causing the problem？（）
    A

    NIC

    B

    HBA

    C

    Tape backup drive

    D

    SCSI adapter

    E

    CPU


    正确答案： A,D
    解析： 暂无解析

  • 第12题：

    单选题
    Which of the following statements is correct regarding an oil with a high viscosity index?（）
    A

    A large change of viscosity occurs with a minor change in temperature

    B

    No change in viscosity occurs with any change in temperature

    C

    Very little change in viscosity occurs with a significant change in temperature

    D

    The viscosity of the oil increases with an increase in temperature


    正确答案： C
    解析： 暂无解析

  • 第13题：

    Which of the following may better check students′ ability of using a grammatical structure


    A.Having them work out the rule.

    B.Having them give some examples.

    C.Having them explain the meaning.

    D.Having them explain the structure.

    答案：B
    解析：
    考查语法教学技能。此题是问：下列哪一项可以更好地检测学生运用语法结构的能力A项意为“让他们找出规律”，B项意为“让他们给出一些例子”，C项意为“让他们解释含义”，D项意为“让他们说明结构”。通过让学生给出一些相同语法结构的例句，可以更准确地判断出他们对于该句法结构的把握。故选B。

  • 第14题：

    A user is having problems printing. The technician believes the printer may be out of ink. Which of the following troubleshooting steps should be performed NEXT?（）

    • A、Establish a plan of action to resolve the problem
    • B、Implement the solution
    • C、Test the theory to determine cause
    • D、Verify full system functionality

    正确答案:C

  • 第15题：

    单选题
    Which of the following problems represent one possible cause of high lube oil consumption in a four stroke diesel engine?（）
    A

    Worn intake valve guides

    B

    Pitted pre-combustion chambers

    C

    Loose valve tappets

    D

    High exhaust back pressure


    正确答案： D
    解析： 暂无解析

  • 第16题：

    单选题
    Whether using a centrifuge or a simple filter, oil cleaning and filtration will be the most effective when the oil is at a （）.
    A

    high temperature and a high viscosity

    B

    high temperature and a low viscosity

    C

    low temperature and a high viscosity

    D

    low temperature and a low viscosity


    正确答案： A
    解析： 暂无解析

  • 第17题：

    单选题
    Which of the following is a factor of fuel oil almost having nothing to do with the formation of combustion products?（）
    A

    setting point

    B

    ash

    C

    sulfur content

    D

    carbon residues


    正确答案： C
    解析： 暂无解析

  • 第18题：

    单选题
    The tendency for lubricating oil to thin out at high temperatures and thicken at low temperatures will be characterized by a （）.
    A

    low viscosity index

    B

    high viscosity index

    C

    high neutralization number

    D

    low demulsibility quality


    正确答案： D
    解析： 暂无解析

  • 第19题：

    单选题
    Which of the following conditions indicates the dilution of diesel engine lube oil by fuel oil?（）
    A

    Water discharging from the water outlet of the lube oil purifier

    B

    Fuel oil discharging from the water outlet of the lube oil purifier

    C

    Lube oil discharging from the water outlet of the lube oil purifier

    D

    A change in the lube oil viscosity


    正确答案： C
    解析： 暂无解析

  • 第20题：

    单选题
    When bilge water is heated in a holding tank, which one of the following statements is not accurate?（）
    A

    The high temperature facilitates primary gravity separation

    B

    Most of the oil and organic solvents are raised to the top layer

    C

    The high the temperature is, the more the top oil will be collected

    D

    The high temperature has little use on the separation of emulsified oil


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    Which of the following operational conditions will occur to the diesel engine lube oil at extremely high temperature?（）
    A

    The oil oxidizes and forms carbon deposits

    B

    The viscosity increases

    C

    Engine oil consumption decreases

    D

    Lubricating qualities of the oil are enhanced


    正确答案： D
    解析： 暂无解析

  • 第22题：

    单选题
    Which of the following represents the significance the fuel oil cetane number?（）
    A

    The cetane number has no affect on injection lag

    B

    The cetane number is an indication of the fuel’s viscosity

    C

    Ignition lag is reduced with fuels having a high cetane number

    D

    The cetane number is of little significance in the combustion


    正确答案： B
    解析： 暂无解析

  • 第23题：

    单选题
    Oil oxidation, as a result of excessively high lube oil temperature, is harmful to a diesel engine because （）
    A

    oil foaming will occur

    B

    large quantities of oil are consumed

    C

    lube oil viscosity is always decreased

    D

    corrosive by-products are usually formed


    正确答案： C
    解析： 暂无解析

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