ABC Pumping Systems and Hydraulics

Question 1

What is the term for the total head a pump must work against, including static head plus friction losses?

Accepted Answer

Total Dynamic Head

Answer

Net Positive Suction Head

Answer

Discharge Pressure Head

Answer

Velocity Head

Question 2

Cavitation in a centrifugal pump is most directly caused by which condition?

Accepted Answer

Insufficient Net Positive Suction Head Available (NPSHa)

Answer

Excessive discharge pressure

Answer

High motor amperage

Answer

Over-sized impeller diameter

Question 3

On a pump curve, the point where the pump curve intersects the system curve is called the:

Accepted Answer

Operating Point

Answer

Shutoff Head

Answer

Best Efficiency Point

Answer

Maximum Flow Point

Question 4

A centrifugal pump running at twice its original speed will produce approximately how many times its original flow rate?

Accepted Answer

2 times

Answer

4 times

Answer

8 times

Answer

1.5 times

Question 5

Which type of pump is most commonly used for high-volume, low-pressure water distribution applications?

Accepted Answer

Centrifugal pump

Answer

Reciprocating piston pump

Answer

Peristaltic pump

Answer

Gear pump

Question 6

The pressure drop due to water flowing through a pipe is primarily a function of:

Accepted Answer

Flow velocity, pipe diameter, and pipe length

Answer

Pipe color and material grade only

Answer

Pump motor horsepower only

Answer

Water temperature and color

Question 7

A water hammer event in a pipeline is best prevented by:

Accepted Answer

Installing surge tanks or slow-closing valves

Answer

Increasing pump speed rapidly

Answer

Reducing pipe diameter

Answer

Using higher voltage motors