OIT OIT Pumping Systems and Hydraulics

Question 1

What is the term for the total head a pump must overcome, including elevation, friction, and pressure differences?

Accepted Answer

Total dynamic head (TDH)

Answer

Static head

Answer

Dynamic head

Answer

Velocity head

Question 2

What type of pump is most commonly used in water and wastewater treatment facilities?

Accepted Answer

Centrifugal pump

Answer

Piston pump

Answer

Peristaltic pump

Answer

Gear pump

Question 3

What does NPSH stand for in pump hydraulics?

Accepted Answer

Net Positive Suction Head

Answer

Normal Pump System Head

Answer

Net Pressure Suction Height

Answer

Normal Positive Static Head

Question 4

What condition occurs when vapor bubbles form and collapse inside a pump due to low suction pressure?

Accepted Answer

Cavitation

Answer

Water hammer

Answer

Priming failure

Answer

Air binding

Question 5

What is the purpose of a check valve installed on the discharge side of a pump?

Accepted Answer

To prevent backflow when the pump stops

Answer

To regulate pump speed

Answer

To reduce water hammer in suction piping

Answer

To measure flow rate through the pump

Question 6

What does a pump curve show?

Accepted Answer

The relationship between flow rate and head for a specific pump

Answer

The relationship between pump speed and motor horsepower

Answer

The temperature rise across a pump at various flows

Answer

The efficiency of the pump motor at different voltages