Question

Which of the following is not correct in case of centrifugal pump?

• A. They cannot be used for pumping water containing sediments like silt and sand
• B. They are quite durable and safe against high pressure
• C. They can be installed in limited space
• D. Such pumps require priming

Hint:

Centrifugal pumps usually require priming and are not ideal for muddy or sediment-laden water.

Answer 1

The Correct Option is B

Concept:
Centrifugal pumps are commonly used pumps for irrigation and water lifting. They operate by converting mechanical energy into kinetic energy and then into pressure energy.

Step 1: Check sediment condition.
Centrifugal pumps are generally not suitable for pumping water containing large amounts of silt and sand because sediments may damage the pump parts. \[ (A) \text{ is correct} \]

Step 2: Check installation space.
Centrifugal pumps are compact and can be installed in limited space. \[ (C) \text{ is correct} \]

Step 3: Check priming.
Most centrifugal pumps require priming before starting. \[ (D) \text{ is correct} \]

Step 4: Identify the incorrect statement.
The statement that centrifugal pumps are safe against high pressure is not the most correct general statement, because they are generally used for low to moderate head conditions. \[ \therefore \text{Correct Answer is (B)} \]