Assuming flow to be laminar, if the diameter of the pipe is halved, then the pressure drop will_______________?
Correct answer: A. Increase
- A. Increase
- B. Decrease
- C. Remain same
- D. Be quadrupled
Explanation
For laminar pipe flow, pressure drop increases strongly as diameter decreases; at constant flow rate, ΔP is proportional to 1/D⁴. Halving the diameter therefore increases the pressure drop, although the exact factor is not offered among the choices.
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