Civil Engineering
GATE CE concept:critical-flow PYQs
Build your understanding with focused practice from past exam papers.
How to practice concept:critical-flow
Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.
Questions 1–4 of 4. Imported answers require independent review unless marked reviewed.
Question 62
Open questionCENAT2 marksNeeds review
A 5.0 m wide rectangular channel carries a discharge of 10 m³/s at a depth of 1.5 m under uniform flow. To produce critical flow conditions without affecting the upstream conditions, the channel bottom elevation should be raised (in m) by __________ (rounded off to 2 decimal places).
Assume that there is no loss of head at the raise, kinetic energy correction factor is 1.0, and acceleration due to gravity is 9.81 m/s².
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 44
Open questionCE-2MCQ2 marksNeeds review
The critical flow condition in a channel is given by ______.
[Note:
– kinetic energy correction factor;
– discharge;
– cross-sectional area of flow at critical flow condition;
– top width of flow at critical flow condition;
– acceleration due to gravity]Your answerChoose one option.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 58
Open questionCENAT2 marksNeeds review
Depth of water flowing in a 3 m wide rectangular channel is 2 m. The channel carries a discharge of 12 m³/s. Take
m/s².The bed width (in m) at contraction, which just causes the critical flow, is ________ without changing the upstream water level. (round off to two decimal places)
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 13
Open questionCEMCQ1 markNeeds review
In a rectangular channel, the ratio of the velocity head to the flow depth for critical flow condition, is
Your answerChoose one option.
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