海船船员考试

单选题Ring groove inserts are occasionally used on aluminum alloy piston to（）A reduce the ring groove wear rateB seal against crankcase vaporsC lessen the wear on aluminum part of the cylinderD allow for the greater expansion rate of aluminum

题目
单选题
Ring groove inserts are occasionally used on aluminum alloy piston to（）
A

reduce the ring groove wear rate

B

seal against crankcase vapors

C

lessen the wear on aluminum part of the cylinder

D

allow for the greater expansion rate of aluminum

如果没有搜索结果，请直接 联系老师 获取答案。
如果没有搜索结果，请直接 联系老师 获取答案。
相似问题和答案

第1题：

客户操作系统可以运行在什么权限?()

A.Ring0

B.Ring1

C.Ring2

D.Ring3


答案：D

第2题：

Because of the high loads the bearing material is a tin-aluminum(锡-铝) alloy bonded to a steel shell. The crosshead pin is highly polished to a______.

A.flat surface

B.mirror finish

C.sloping(倾斜的) surface

D.inclined(倾向的) surface


正确答案：B

第3题：

Which of the following best illustrates the relation between reason and revelation?

［A］ They are simply identical.

［B］ Revelation guides reason.

［C］ They are occasionally contradictory.

［D］ Reason is used to perfect revelation.


正确答案：B

本题考查了考生对事实细节的概括能力。文章第二段就理智和启示二者的关系作了详细的论述。该段第一句明确指出，决定经院哲学家持有共同观点最重要的一点是他们确信理智和启示二者间基本的和谐关系。接下来第三句作者提到，二者表面上的对立可以追溯到对理智的错误运用和对启示的误解中，所以［C］项错误。该段后半部分内容中作者对二者的关系进一步展开具体论述：经院哲学家坚信启示能掌握更高层次的真理和确定性；在宗教信仰和哲学推理表面上的冲突中，信仰总是更高层次的裁决者，神学者的决定支配着哲学家的决定。可见［B］项是两者关系的恰当诠释。［A］项和［D］项文中未提及。

第4题：

单选题
A stopper used in securing the ground tackle for sea that consists of a grab attached to a turnbuckle is a（）.
A

riding pawl

B

buckler

C

devil's claw

D

locking ring


正确答案： B
解析： 暂无解析

第5题：

单选题
In large, low-speed, main propulsion diesel engine, position ring groove wear usually occurs at the（）
A

top of the ring groove

B

back of the ring groove

C

bottom of the ring groove

D

piston ring end clearance


正确答案： C
解析： 暂无解析

第6题：

A stopper used in securing the ground tackle for sea that consists of a grab attached to a turnbuckle is a ______.

A.riding pawl

B.buckler

C.devil’s claw

D.locking ring


正确答案：C
制动器用牢固的锚泊索具，由抓斗依附到螺丝扣组成叫锚链掣。

第7题：

大沟(major groove)和小沟(minor groove)


正确答案:绕B-DNA双螺旋表面上出现的螺旋槽（沟），宽的沟称之大沟，窄沟称之小沟。大沟、小沟都是由于碱基对堆积和糖-磷酸骨架扭转造成的。

第8题：

Which of the following statements represents the function of the compression rings installed at the top of a diesel Engine piston?

A.Control the amount of lube oil burned in the combustion chamber

B.Transmit heat from the piston to the cylinder liner

C.Prevent damage to ring groove inserts by acting as a heat dam

D.Dissipate combustion chamber gas pressure by channeling it through the ring gap


正确答案：B

第9题：

单选题
A diesel engine piston ring face is in direct contact with the （）.
A

top of the ring groove

B

cylinder liner oil film

C

bottom of the ring groove

D

back of the ring groove


正确答案： B
解析： 暂无解析

第10题：

单选题
Which of the following statements represents the function of the compression rings installed at the top of a diesel Engine piston?（）
A

Control the amount of lube oil burned in the combustion chamber

B

Transmit heat from the piston to the cylinder liner

C

Prevent damage to ring groove inserts by acting as a heat dam

D

Dissipate combustion chamber gas pressure by channeling it through the ring gap


正确答案： D
解析： 暂无解析

更多相关问题
相关内容