Test: Open Channel Flow Level - 1

# Test: Open Channel Flow Level - 1

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## 20 Questions MCQ Test | Test: Open Channel Flow Level - 1

Test: Open Channel Flow Level - 1 for Civil Engineering (CE) 2023 is part of Civil Engineering (CE) preparation. The Test: Open Channel Flow Level - 1 questions and answers have been prepared according to the Civil Engineering (CE) exam syllabus.The Test: Open Channel Flow Level - 1 MCQs are made for Civil Engineering (CE) 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Open Channel Flow Level - 1 below.
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Test: Open Channel Flow Level - 1 - Question 1

### The phenomenon occurring in an open channel when a rapidly flowing stream abruptly changes to slowly flowing stream causing a distinct rise of liquid surface is

Test: Open Channel Flow Level - 1 - Question 2

### For a given discharge in a horizontal frictionless channel two depths may have the same specific force. These two depths are known as

Detailed Solution for Test: Open Channel Flow Level - 1 - Question 2 In case of same specific energy depth it is called alternate depth and for same specific force it is called sequent depth.

Test: Open Channel Flow Level - 1 - Question 3

### Hydraulic jump is a(i) Steady flow(ii) Uniform flow(iii) Unsteady flow(iv) Non-uniform flow The correct answer is

Test: Open Channel Flow Level - 1 - Question 4

The Chezy’s coefficient

Test: Open Channel Flow Level - 1 - Question 5

A triangular channel section is most economical when each of its sloping sides is inclined to the vertical at an angle of

Test: Open Channel Flow Level - 1 - Question 6

For any channel section, the specific energy increases with

(i) increase in depth of sub-critical flow

(ii) increase in depth of super-critical flow

(iii) decrease in depth of sub-critical flow

(iv) decrease in depth of super-critical flow

Test: Open Channel Flow Level - 1 - Question 7

Froude number is the ratio of inertia force to

Test: Open Channel Flow Level - 1 - Question 8

Which of the following Froude number range indicates a weak jump?

Detailed Solution for Test: Open Channel Flow Level - 1 - Question 8
 Type of Jump Fr Undular jumpWeak jumpOscillating jumpSteady jumpStrong jump 1‒ 1.71.7 − 2.52.5 ‒ 4.54.5 ‒ 9.0> 9.0

Test: Open Channel Flow Level - 1 - Question 9

For a steep slope profile S1 , the type of flow will be

Test: Open Channel Flow Level - 1 - Question 10

For a given specific energy E, the critical depth YC for a rectangular channel is given

Detailed Solution for Test: Open Channel Flow Level - 1 - Question 10

Test: Open Channel Flow Level - 1 - Question 11

The critical state of flow in a non-rectangular channel is expressed by

Test: Open Channel Flow Level - 1 - Question 12

The height of hydraulic jump is equal to

Test: Open Channel Flow Level - 1 - Question 13

The flow characteristic of a channel does not charge with time at any point. What type of flow is it?

Detailed Solution for Test: Open Channel Flow Level - 1 - Question 13 The flow characteristics unchanged with time is a steady flow, characteristics unchanged with space is a uniform flow. Laminar and turbulent flows are classified with reference to Reynolds number

Test: Open Channel Flow Level - 1 - Question 14

If the specific energy at the upstream section of a rectangular channel is 3 m and minimum specific energy is 2.5 m the maximum height of hump without causing afflux will be

Detailed Solution for Test: Open Channel Flow Level - 1 - Question 14 ∆Z = height of hump = E1 − Emin

E1 = Energy at section ① (before hump)

Emin = Minimum Energy at critical flow ∆Z = 3 − 2.5 = 0.5m

Test: Open Channel Flow Level - 1 - Question 15

When the slope of bottom of a channel rises in the direction of flow, it is called

Detailed Solution for Test: Open Channel Flow Level - 1 - Question 15

Test: Open Channel Flow Level - 1 - Question 16

If F1 and F2 are the Froude numbers of flow before and after the hydraulic jump occuring in a rectangular channel, and y1 and y2 is a depth of flow before and after the hydraulic jump, then

Test: Open Channel Flow Level - 1 - Question 17

A rectangular channel is 4 m wide and 2.5 m deep water is flowing in the channel for a depth of 2.1 m. The hydraulic radius is

Detailed Solution for Test: Open Channel Flow Level - 1 - Question 17

= 1.024 m

Test: Open Channel Flow Level - 1 - Question 18

For a maximum discharge in a circular channel section, the ratio of the depth of flow to that of diameter of the channel is

Detailed Solution for Test: Open Channel Flow Level - 1 - Question 18

So for Qmax = d / D = 0.95

Test: Open Channel Flow Level - 1 - Question 19

For maximum velocity in a circular channel section the ratio of the depth of flow to that of diameter of the channel is

Detailed Solution for Test: Open Channel Flow Level - 1 - Question 19 For Vmax = d / D = 0.81

Test: Open Channel Flow Level - 1 - Question 20

The depth of flow for maximum velocity in a circular channel section with diameter equal to 2.5 m is

Detailed Solution for Test: Open Channel Flow Level - 1 - Question 20 For Vmax = d / D = 0.81

D = 2.5 m d = 0.81 × D = 0.81 × 2.5 = 2.025 m

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