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Two important considerations for the proper lubrication of a

题目
单选题
Two important considerations for the proper lubrication of a diesel engine include the delivery of the oil in sufficient amount and the （）.
A

cetane number

B

pour point

C

viscosity temperature

D

quality of the oil

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相似问题和答案

第1题：

Which of the following statements concerning the lubrication of diesel propulsionengines used in vessels over 300 gross tons is most accurate? ( )

A.Lubrication systems using engine driven lube oil pumps do not require any additionalindependent arrangement when such arrangements have been proven reliable.

B.The use of engine driven pre-lube pumps is permitted on vessels with propulsionsystems developing less than 500 shaft horsepower.

C.When forced lubrication is used for propulsion engines , one independently drivenstandby pumps is to be provided in addition to the necessary pumps for normaloperation.

D.Lubrication systems where two oil coolers are fitted require a minimum of twotemperature control devices which may be actuated by similar sensors.


正确答案：C
解析：gross:总的，毛的;accurate：精确的;additional:附加的;independent：独立;arrangement：布置，安排;reliable：可靠的;device：设备;actuate：开动;similar：类似的;sensor：传感器
译文：关于使用在300总吨以上的船舶上的柴油机滑油的陈述下列哪个最准确?如果推进柴油机是强制润滑的，那么除了正常运行必要的那台泵之外，还应该有一台独立驱动的备用泵。

第2题：

What are two important considerations when using 2- or 4-channel 15216 OADMs?（） (Choose two.)

  • A、All "Add" channels require uniform power levels.
  • B、The flexibility of wavelengths per OADM is limited.
  • C、It is easier to balance "Pass-Through" and "Add" channels.
  • D、There is lower pass-through loss using multi-channel OADMs.
  • E、You can extract a single channel without dropping other channels.

正确答案:A,B

第3题：

It is important to choose a ______system of education.

A. valuable

B. meaningful

C. fitted

D. proper


参考答案：D

第4题：

单选题
The film of oil between the rings and the liner is not only essential for the lubrication but also plays an important part in achieving （）.
A

an oil seal

B

removing heat

C

a gas seal

D

cooling the piston


正确答案： D
解析： 暂无解析

第5题：

What are three key pre-installation/configuration considerations when deploying a WX device?（） (Choose three.)

  • A、cabling
  • B、community topology
  • C、requires a license key
  • D、requires two IP addresses
  • E、registration server designation

正确答案:A,B,E

第6题：

The most crucial time for any bearing with regards to lubrication is

A.during low loads

B.after proper oil viscosity is reached

C.during starting

D.after cleaning filters


正确答案：C

第7题：

What are two considerations to using IP Multicast delivery? （）

  • A、no congestion avoidance
  • B、not for bandwidth intensive applications
  • C、no guaranteed delivery mechanism
  • D、source sends multiple data streams out each interface

正确答案:A,C

第8题：

King and queen are the two most important members of a(n) ________ family.

A.legendary

B.renowned

C.imperial

D.breathtaking


答案：C

解析：题干句意为：国王和王后在（）家庭中是最重要的两个成员。legendary意为“传奇的”，renowned意为“有声望的”，imperial意为“帝国的”，breathtaking意为“惊险的”，此处填入imperial符合句意，答案选C。

第9题：

When conducting a wireless voice site survey， which two sizing considerations exist for thecoverage cell？（）

  • A、rogue access point detection in the coverage area
  • B、multipath issues in the coverage area
  • C、number of VoWLAN users in the coverage cell
  • D、call capacity requirements of the coverage area

正确答案:C,D

第10题：

单选题
Large crosshead type engine generally has two lubrication systems, a function performed only by crankcase oil system is（）
A

lubricating

B

cooling

C

cleaning

D

neutralizing


正确答案： A
解析： 暂无解析

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