单项选择题X 纠错

Some （） lying in the starting air lines will give rise to corrosion and can cause water hammer.

A.air
B.moisture
C.cooling water
D.lubricant

参考答案：
进入题库练习
查答案就用赞题库小程序 还有拍照搜题 语音搜题 快来试试吧
无需下载 立即使用

你可能喜欢

单项选择题

During compressors running the accumulated moisture in the separators must be （）.

A.drained off
B.collected
C.sent to the crankcases
D.separated with oil

点击查看答案进入题库练习

单项选择题

By far the greatest use is for diesel engine starting using air pressure of 25 bar or more provided by （）.

A.rotary compressors
B.reciprocating compressors
C.centrifugal compressors
D.screw compressors

点击查看答案进入题库练习

单项选择题

Compressed air is used on board ship for all the following purposes except （）.

A.starting diesel engines
B.pneumatic control systems
C.pneumatic tools
D.supercharging air

点击查看答案进入题库练习

单项选择题

Low pressure air is usually taken through （） or pressure regulators to a low pressure reservoir supplying a ring main through driers.

A.globe valves
B.butterfly valves
C.gate valves
D.reducing valves

点击查看答案进入题库练习

单项选择题

A number of biological sewage treatment plants are in use at sea but nearly all work on what is called the extended aeration processBasically the consists of oxygenating the liquor by bubbling air through itAccording to the above two sentences, the word "this" means （）.

A.a sewage treatment plant
B.the extended aeration process
C.the liquor
D.the bubbling air

点击查看答案进入题库练习
赞题库

赞题库-搜题找答案

（已有500万+用户使用）


  • 历年真题

  • 章节练习

  • 每日一练

  • 高频考题

  • 错题收藏

  • 在线模考

  • 提分密卷

  • 模拟试题

无需下载 立即使用
手机版 电脑版

版权所有©考试资料网(ppkao.com)All Rights Reserved