欢迎来到牛牛题库网 牛牛题库官网
logo
搜索
全部科目 > 水路交通运输技能考试 > 海船船员考试 > 船舶管理(轮机专业) > 轮机英语 > 船舶辅助机械

单项选择题

The packing installed in the pump stuffing box is lubricated by （）.

A.gravity and feed oil cups
B.grease cups
C.hand during installation
D.leakage through the stuffing box

点击查看答案&解析
上一题 目录 下一题

相关考题

单项选择题
The steam coils in a high pressure evaporator used for saltwater service should be de-scaled with （）.

A.a needle gun
B.soap and water
C.a wire brush
D.a chipping hammer
单项选择题
Which of the listed chemicals can be routinely used to maintain the hygienic quality of potable water?（）

A.Hydrochloric acid
B.Chlorine
C.Sulfuric acid
D.Zinc chromate
单项选择题
The ratio of the weight of moisture contained in a given volume of air, to the weight of moisture that the same sample would hold if saturated, is called the（）.

A.absolute humidity
B.relative humidity
C.specific humidity
D.total humidity
微信小程序免费搜题

All Rights Reserved 版权所有©牛牛题库网(nntiku.com)

备案号：湘ICP备2022003000号-1

微信扫一扫,加关注免费搜题

微信扫一扫,加关注免费搜题