The hydraulic diameter is used for:

A Circular pipes only

B Non-circular cross-sections to calculate Reynolds number and friction

C Open channels only

D Gas flow only

✓ Correct Answer: Option B

Dₕ = 4A/P (area/perimeter). Allows use of circular pipe correlations for non-circular sections.

💡 Why is B) the correct answer?

The correct answer to the question "The hydraulic diameter is used for:" is Option B: Non-circular cross-sections to calculate Reynolds number and friction.

The other options — A) Circular pipes only, C) Open channels only, D) Gas flow only — are incorrect for this FE Exam Prep question. As explained above: Dₕ = 4A/P (area/perimeter). Allows use of circular pipe correlations for non-circular sections.

📚 About This FE Exam Prep Practice Question

This 2-level FE Exam Prep question from the Engineering Sciences topic is part of BrainForge Quiz's free exam preparation library. Each question includes the correct answer and a detailed explanation to help you understand the underlying concept, not just memorize the answer.

How to use this page: Read the question above, consider all four options (A through D), then check the highlighted correct answer and explanation. For active timed practice, start a free FE Exam Prep practice test or use flashcards for spaced repetition review.

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The hydraulic diameter is used for:

✓ Correct Answer: Option B

📚 About This FE Exam Prep Practice Question

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