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GATE Exam Questions - Engineering

Q1:

Flow at critical depth takes place in an open channel When

A for a given specific energy, discharge is maximum

B for a given discharge, specific energy is maximum

C discharge is minimum for a given specific energy

D discharge is maximum for a given specific force

ANS:B - for a given discharge, specific energy is maximum

For a given value of specific energy, the critical depth gives the greatest discharge, or conversely, for a given discharge, the specific energy is a minimum for the critical depth.