海船船员考试

单选题Which of the listed pressure control valves would be used to establish the maximum operating pressure of a hydraulic system?（）A Pressure-reducing valveB Unloading valveC Counterbalance valveD Pressure-relief valve

题目
单选题
Which of the listed pressure control valves would be used to establish the maximum operating pressure of a hydraulic system?（）
A

Pressure-reducing valve

B

Unloading valve

C

Counterbalance valve

D

Pressure-relief valve

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：

单选题
（） are used to limit the pressure in any particular portion and mainly control the pressure after the valve.
A

Relief valves

B

Check valves

C

Safety valves

D

Reducing valve


正确答案： C
解析： 暂无解析

第2题：

单选题
The device used for low-pressure control and high-pressure cutout on a compressor is called a（）
A

cutout

B

pressure controller

C

controller switch

D

cutout switch


正确答案： A
解析： 暂无解析

第3题：

Which of the listed pressure control valves would be used to establish the maximum operating pressure of a hydraulic system?

A.Pressure-reducing valve

B.Unloading valve

C.Counterbalance valve

D.Pressure-relief valve


正确答案：D

第4题：

单选题
For the proper control of the air temperature in an air conditioning system using chilled water circulation, which of the listed conditions should remain constant regardless of load changes?（）
A

Chilled water system supply temperature

B

Chilled water system return temperature

C

Compressor discharge temperature

D

Compressor suction pressure


正确答案： D
解析： 暂无解析

第5题：

单选题
Which of the valves listed is NOT considered to be a hydraulic system directional control valve?（）
A

Spring-centered valve

B

Unloading valve

C

Three-position valve

D

Two-position valve


正确答案： C
解析： 暂无解析

第6题：

单选题
Which of the conditions listed would cause simultaneous high cylinder firing pressure and low exhaust temperature?（）
A

Improper fuel rack positioning

B

Lengthy opening of the exhaust valve

C

Excessively early injection timing

D

Extended light load operation


正确答案： C
解析： 暂无解析

第7题：

单选题
Which of the valves listed should be used either in the fully opened or the fully closed position?（）
A

A gate valve

B

A globe valve

C

Any check valve

D

Any needle valve


正确答案： C
解析： 暂无解析

第8题：

Which of the listed devices is used to measure pressure and convert it to an electrical signal?

A.Transducer

B.Reducer

C.Transformer

D.Rectifier


正确答案：A

第9题：

单选题
In the design of hydraulic piping and equipment consideration is given to minimize turbulence in the hydraulic fluid, as this will cause（）
A

molecular fluid vibration

B

energy losses

C

wide pressure variations

D

mechanical damage to control valves


正确答案： A
解析： 暂无解析

第10题：

单选题
Which of the following methods is used to prevent throttling of compressed air through the diesel engine air starting valves?（）
A

Holding the valve open for a long period

B

Increasing the starting air pressure used

C

Opening the stating air valve quickly

D

Reducing the starting air valve size


正确答案： D
解析： 暂无解析

更多相关问题
相关内容