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Increasing the speed of a centrifugal pump will result in an

题目
单选题
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（）
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

参考答案和解析
正确答案： D
解析： 暂无解析
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相似问题和答案

第1题：

An over-speed safety device is usually fitted to a generator engine for ___ in the event of over-speed.

A.stabilizing the ship speed

B.increasing the fuel pump setting

C.braking the crankshaft

D.cutting power off the engine


正确答案：D

第2题：

All of the following steps are taken in starting a centrifugal pump，EXCEPT to ______．

A.Set the relief valve

B.Check the lubrication system

C.Vent the pump casing

D.Open the pump suction and discharge valves


正确答案：A

第3题：

Throttling in the _____ line of a centrifugal pump involves the risk of the pump cavitation.

A.suction

B.exhaust

C.pressure

D.discharge


正确答案：A

第4题：

单选题
Reduced capacity, accompanied by vibration and noise at the suction of a centrifugal pump is a result of （）.
A

cavitation

B

water hammer

C

fluid friction

D

steam knock


正确答案： A
解析： 暂无解析

第5题：

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

Oil is discharged from the impeller through the outlet

B

Gravity causes the oil to flow toward the discharge

C

The self-priming feature of the centrifugal pump enables it to draw its own suction as it starts

D

The discharge capacity varies directly with the speed of the impeller


正确答案： C
解析： 暂无解析

第6题：

Which method should be used to warm up the pump turbines prior to discharge ________．

A.Lock the turbine rotor and slowly bleed in steam until operating temperature is reached

B.Run the pump at high speed with the discharge valves closed

C.Run the turbine at slow speed with the pump disconnected

D.Shut the discharge valve and run the pump at slow speed


正确答案：D

第7题：

单选题
With respect to centrifugal pump impellers, which of the following descriptions represents the correct centrifugal pump classification? （）
A

Single stage or multistage

B

High pressure or low pressure

C

Open or close coupled

D

Horizontal or vertical


正确答案： C
解析： 暂无解析

第8题：

If a centrifugal pump is driven by a constant speed electric motor and produces a discharge pressure less than designed, the cause is probably ______.

A.excessive pump speed

B.excessive suction head

C.worn wearing rings

D.gross pump misalignment


正确答案：C

第9题：

单选题
Which one is not the component of a typical, marine pattern self-contained unit?（）
A

a centrifugal fan

B

a direct expansion cooler

C

a hermetic compressor

D

a centrifugal pump


正确答案： D
解析： 暂无解析

第10题：

单选题
Which method should be used to warm up the pump turbines prior to discharge（）.
A

Lock the turbine rotor and slowly bleed in steam until operating temperature is reached

B

Run the pump at high speed with the discharge valves closed

C

Run the turbine at slow speed with the pump disconnected

D

Shut the discharge valve and run the pump at slow speed


正确答案： C
解析： 暂无解析

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