Question

est Time Left:0:07:49 Haris Bhatti: Attempt 1 Question 6 (1 point) In the lab experiment when the tailgate is raised and flow downstream of the sluice gate is supercritical, which of the following is true: The depth upstream of the sluice gate decreases The depth upstream of the sluice gate remains unchanged The depth upstream of the sluice gate increases The depth upstream of the sluice gate may increase or decrease Question 7 (1 point) Which of the following characterises subcritical flow: The flow is relatively shallow and fast flowing The flow depth is relatively shallow and slow in velocity The flow depth is relatively deep and fast flowing The flow depth is relatively deep and slow in velocity Question 8 (1 point) What happens to the water level in the channel when a hump is placed in the channel when the flow is subcritical? Cannot be said The water level increases O Water level remains the same The water level decreases

Answer 1

Ans. (6) option c is the answer

The depth on the up-stream of the sluice gate will increase while the flow flow downstream of the sluice gate is maintained in supercritical condition because the depth of the water level in supercritical condition is less than the normal depth of the water in the channel.

Ans. 7 option d is the answer

In case of subcritical flow, the depth of the water is greater than the critical flow and the velocity is also lower. That is why subcritical flow is also called as tranquil flow or streaming flow.

Ans. 8 option d is the answer

When a hump is placed in a channel having a subcritical flow, the depth of water decreases and hence the flow gets converted into supercritical flow.