Question

Consider the following statements in respect of critical flow in a wide rectangular channel:

Which of these statements are correct?

• A. 1,2 and 4 only
• B. 1,2 and 3 only
• C. 2, 3 and 4 only
• D. 1, 2, 3 and 4

Answer 1

The correct option is D 1, 2, 3 and 4

At critical flow, specific energy and specific force are minimum for a given discharge.
In other words, a given specific energy or specific force discharge is maximum at critical flow and the Froude number is equal to unity.