Question

Centrifugal pumps are classified according to: A. Type of energy conversion, B. Number of stages, C. Impeller types, D. Axis of rotation, E. Method of drive.

• A. A and B only
• B. A, B and C only
• C. A, B, C and D only
• D. A, B, C, D and E

Hint:

Centrifugal pumps can be classified by stages, impeller type, axis of rotation and method of drive.

Answer 1

The Correct Option is D

Concept:
Centrifugal pumps may be classified on the basis of several design and operational features.

Step 1: Type of energy conversion.
Pumps can be classified based on how energy is converted and transferred to water. \[ A \text{ is correct} \]

Step 2: Number of stages.
They can be single-stage or multi-stage pumps. \[ B \text{ is correct} \]

Step 3: Impeller types.
Centrifugal pumps may have different impeller types. \[ C \text{ is correct} \]

Step 4: Axis of rotation and method of drive.
They may also be classified according to axis of rotation and method of drive. \[ D \text{ and } E \text{ are correct} \] Thus, all given bases of classification are correct. \[ \therefore \text{Correct Answer is (D)} \]