Increasing the speed of a centrifugal pump will result in an increase in its capacity in its capacityAnother means of increasing the capacity pump is to increase the（） -题库考试答案搜索网

Increasing the speed of a centrifugal pump will result in an increase in its capacity in its capacityAnother means of increasing the capacity pump is to increase the（）

单选题

2022-01-03 23:12

A、diameter of the discharge piping, with all other factors remaining the same
B、diameter of the suction piping, with all other factors remaining the same
C、width of the impeller only
D、diameter of the impeller

查看答案

正确答案

试题解析

标签：船舶电气与船舶安全

感兴趣题目

Increasing the speed of a rotary pump above its rated speed will result in which of the following conditions to occur?（）

If the engine is naturally aspirated, or is a small high-speed type with a centrifugal turbocharger, the period of valve overlap（）,ie when both valves are（）, will be and the exhaust valve will close some 10°top dead canter（）.

A centrifugal impeller consists of a number of vanes curving （） from the direction of rotation.

If the capacity of a centrifugal pump decreases gradually over a long period of time, you should replace the （）.

The usual symptoms of cavitation in a centrifugal pump is （）.

不符合“A”型船舶特点的其他船舶均称为“B”型船舶。

船长应负责保管的船舶安全管理方面的证书有（）。 Ⅰ．符合证明； Ⅱ．符合证明的副本； Ⅲ．船舶安全管理证书； Ⅳ．船舶安全管理证书的副本。

If necessary to avoid collision or allow more time to（）the situation，a vessel shall slacken her speed or take all way off by stopping or reversing her means of propulsion．

Which of the following statements is correct with regards to the operation of a centrifugal cargo pump?（）

The purpose of the wearing rings used in a centrifugal pump is to （）.

A公司与B公司签订《船舶转让协议》，约定A公司将船舶转让给B公司，转让价格为XX万元B公司交押金X万元，以后每月支付船价及利息X万元，如两个月内不付转让费，A公司有权收回船舶由B公司负责办理船舶营运手续B公司中途无故退回船舶，已付的转让费不再退回，等等。B公司经营船舶一年后，以A公司提供的船舶陈旧，操纵性能差等为由，向A公司提出终止船舶转让协议。A公司欲协商，但协商不成，A公司收回船舶国籍证书，船舶技术证书及营运证书。该协议属海商法范围内的何种合同？该协议是否有效

Any alteration of course and／or speed to avoid collision shall，if the circumstances of the case admit，（）to another vessel observing visually or by radar.