Hydraulics And Fluid Mechanics MCQ Questions & Answers | Mechanical Engineering

Impeller Diameter (A): A larger impeller diameter means the fluid travels a greater distance while being pushed outwards. This results in a higher velocity of the fluid leaving the impeller and consequently, a higher head (pressure) developed.

Speed (B): The faster the impeller rotates (higher speed), the more kinetic energy is imparted to the fluid. This increased kinetic energy translates into a higher velocity and a greater head being developed by the pump.

Fluid Density (C): While fluid density does affect the power required to pump the fluid, it does not directly influence the head developed by a centrifugal pump for a given impeller diameter and speed. The head is primarily determined by the velocity imparted to the fluid.

Therefore, the head developed by a centrifugal pump is directly related to both the impeller diameter and the speed of rotation.