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单选题The cetane number rates fuels for diesel engines according to its （）A antiknock characteristicsB ignition qualitiesC rates of vaporizationD viscosity

题目
单选题
The cetane number rates fuels for diesel engines according to its （）
A

antiknock characteristics

B

ignition qualities

C

rates of vaporization

D

viscosity

参考答案和解析
正确答案： A
解析： 暂无解析
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相似问题和答案

第1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 process


正确答案：C

第2题：

The cetane number of a diesel fuel oil indicates its ______.

A.viscosity

B.acid content

C.heating value

D.ignition quality


正确答案：D

第3题：

Which of the listed factors will indicate the most about the ability of a fuel to ignite in a diesel engine?

A.Viscosity

B.Sulfur content

C.Pour point

D.Cetane number


正确答案：D

第4题：

单选题
According to the fifth paragraph, we can infer that______.
A

the total number of cops in Cerritos is no less than 53.

B

gang members of nearby cities enjoy immunity in Cerritos.

C

the crime rates in Cerritos are relatively low.

D

Los Angeles country sheriff is responsible for the expense of policing Cerritos.


正确答案： A
解析：
推断题由题干定位到文章第五段。该段第四句提到，这一年共记录了53起严重袭击案，平均每个警察不到一起，由此可推测，Cerrito的警察数量超过了53个，故可排除A项。由尾句可知，附近的犯罪团伙偶尔在这里打球是因为这里治安良好，不会遭到对手的袭击，故可排除B项。由该地警察被视为最轻松的工作和严重袭击案件的数量之少可知，Cerrito的犯罪率极低，而不是相对较低，故排除C项。该段第二句提到，尽管与洛杉矶的县法院之间有一个维持治安的合同，但Cerrito还是承担了修建工作和配备警员的费用，由此可以推测，根据所签合同，洛杉矶县法院应该承担Cerrito维持治安的开销，故答案为D项。

第5题：

单选题
Diesel engines are considered safer than gasoline engines because（）.
A

they are more heavily built

B

the fuel used is less volatile

C

they can be easily reversed

D

they operate at a lower speed


正确答案： B
解析： 暂无解析

第6题：

The cetane number of a diesel fuel oil indicates its ______.

A.ignition quality

B.acid content

C.heating value

D.viscosity


正确答案：A

第7题：

单选题
Scuffed cylinder liner wearing surfaces in a diesel engines can result from （）
A

chromium plating piston rings

B

knurling the piston skirt

C

extended maximum power operation

D

applying load to a cold diesel engine


正确答案： D
解析： 暂无解析

第8题：

Main engines as well as auxiliary engines operating on heavy fuel should have continuousoon the lubricating oil, either according tothebypass or batch principles

A.filtering

B.centrifuging

C.depositing

D.operating


答案：B

第9题：

单选题
（）, so they are widely used on board ship nowadays.
A

Diesel engines have more advantages in comparison with gasoline engines

B

Diesel engines have more advantages in comparison to gasoline engines

C

Gasoline engines have more advantages in comparison with diesel engines

D

Gasoline engines have more advantages in comparison to diesel engines


正确答案： D
解析： 暂无解析

第10题：

单选题
Which of the following statements is true concerning the cetane number of diesel fuel?（）
A

The cetane number affects the amount of injection lag

B

The cetane number is an indication of the fuels viscosity

C

Ignition lag is reduced with fuels having a high cetane number

D

The cetane number is of little significance in the combustion process


正确答案： D
解析： 暂无解析

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