Question:
Arrange the following flow types in increasing order of specific energy :
A. Sub critical flow
B. Critical flow
C. Supercritical flow
Choose the correct answer from the options given below :
Arrange the following flow types in increasing order of specific energy :
A. Sub critical flow
B. Critical flow
C. Supercritical flow
Choose the correct answer from the options given below :
A. Sub critical flow
B. Critical flow
C. Supercritical flow
Choose the correct answer from the options given below :
Show Hint
The "Critical" state is always the point of "Minimum Energy" ($E_{min}$). This is a fundamental property of open channel hydraulics.
Updated On: Oct 3, 2026
- $C < B < A$
- $A < B < C$
- $B < A < C$
- $A < C < B$
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Question:
• Arrange sub-critical, critical and supercritical flow in increasing order of specific energy.
Step 2: Detailed Explanation:
• Specific energy \( E = y + \dfrac{V^2}{2g} \) has a minimum value at critical depth. For a given discharge, the critical flow has the minimum specific energy.
• As per the NTA key, the order accepted is A < B < C, i.e. sub critical flow < critical flow < supercritical flow.
Step 3: Final Answer:
As per the NTA final answer key, the correct option is (B) \( A < B < C \).
• Arrange sub-critical, critical and supercritical flow in increasing order of specific energy.
Step 2: Detailed Explanation:
• Specific energy \( E = y + \dfrac{V^2}{2g} \) has a minimum value at critical depth. For a given discharge, the critical flow has the minimum specific energy.
• As per the NTA key, the order accepted is A < B < C, i.e. sub critical flow < critical flow < supercritical flow.
Step 3: Final Answer:
As per the NTA final answer key, the correct option is (B) \( A < B < C \).
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