Question

For a given fluid, as the pipe diameter increases, the pumping cost

• A. Remains the same.
• B. Increases.
• C. Decreases.
• D. May increase or decrease depending on nature of the fluid.

Hint:

Larger diameter pipes generally reduce pumping costs due to lower fluid velocity and friction losses.

Answer 1

The Correct Option is C

As the pipe diameter increases, the velocity of the fluid decreases for a given flow rate, which reduces the frictional losses and thus the pumping cost.