Test: Flow Over Notches & Weirs - Civil Engineering (CE) MCQ

# Test: Flow Over Notches & Weirs - Civil Engineering (CE) MCQ

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## 7 Questions MCQ Test GATE Civil Engineering (CE) 2025 Mock Test Series - Test: Flow Over Notches & Weirs

Test: Flow Over Notches & Weirs for Civil Engineering (CE) 2024 is part of GATE Civil Engineering (CE) 2025 Mock Test Series preparation. The Test: Flow Over Notches & Weirs questions and answers have been prepared according to the Civil Engineering (CE) exam syllabus.The Test: Flow Over Notches & Weirs MCQs are made for Civil Engineering (CE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Flow Over Notches & Weirs below.
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Test: Flow Over Notches & Weirs - Question 1

### Consider the following measuring structures: 1. Submerged broad-crested weir 2. Free broad-crested weir 3. Free sharp-crested weir 4. Free ogee spillway The correct sequence of the increasing order of the discharge coefficient of these structures is

Detailed Solution for Test: Flow Over Notches & Weirs - Question 1

For ogee spillway, Cd1 = 1.19 Cds
Cds is the discharge coefficient for sharp - crested weir. So 4 will come after 3.
The classification of weir is:

Further submerged weirs have lesser coefficient of discharge compared to free weirs. So, 2 will come after 1.

Test: Flow Over Notches & Weirs - Question 2

### Match List-I with List-ll and,select the correct answer using the codes given below the lists: List-I A. Rehbock formula B. Francis formula C. A special trapezoidal weir D. Linear proportional weir List-lI  1. Sutroweir 2. Rectangular suppressed weir 3. Rectangular side-contracted weir 4. Cippolietti weir

Detailed Solution for Test: Flow Over Notches & Weirs - Question 2

(i) Rehbock’s formula is an empirical formula for calculating discharge in rectangular suppressed weir. It is given by,

Where L is the length of weir, H is head in meters and Z is the crest height in meters,
(ii) Francis’ formula is one of the commonly used empirical formula for computing the discharge over sharp or narrow crested weirs with or without end contraction. Francis proposed the following formulae for the discharge over rectangular weir.
(a) When the velocity of approach is not considered,
Q = 1.84(L - 0.1 nH)H3/2

(b) With the velocity of approach is taken into account,

water surface above the crest of weir, and n is the number of end contractions.

Test: Flow Over Notches & Weirs - Question 3

### The head over a V notch at the end of a channel is 75 cm. If an error of 0.15 cm is possible in the measurement of head, the percentage error. in computing the discharge will be

Detailed Solution for Test: Flow Over Notches & Weirs - Question 3

Percentage error discharge over a

Similarly percentage error in discharge in a rectangular weir

Test: Flow Over Notches & Weirs - Question 4

A hemispherical tank of radius R has an orifice of cross - sectional area ‘a’ at its bottom and is full of liquid. The time required to empty the tank completely is

Test: Flow Over Notches & Weirs - Question 5

A triangular notch is a more accurate measuring device than a rectangular notch

Test: Flow Over Notches & Weirs - Question 6

The head over a 90° V notch weir is increased from 0.15 m to 0.30 m. The ratio of new discharge to the original discharge will be

Detailed Solution for Test: Flow Over Notches & Weirs - Question 6

Test: Flow Over Notches & Weirs - Question 7

The discharge through a Cipolletti weir is given by where symbols have their, usual meanings.

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## GATE Civil Engineering (CE) 2025 Mock Test Series

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