In discharge of water over narrow crested weir, discharge is directly proportional to the second power of height.

For discharge over ogee weir discharge is directly proportional to length but for discharge over narrow crested weir it is inversely proportional to length.

A

True

B

False

Consider the following measuring structures. A. Submerged broad-crested weir B. Free broad-crested weir C. Free sharp-crested weir D. Free ogee spillway Which is the correct sequence of the discharge coefficient of these structures in increasing order?

A

B, A, C, D

B

B, A, D, C

C

A, B, D, C

D

A, B, C, D

A weir is said to be narrow-crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest.

A

Equal to

B

Less than

C

More than

D

None of these

In discharge of water over narrow crested weir, head of water is directly proportional to Discharge Coefficient.

A

True

B

False

A weir is said to be broad crested weir, if the width of the crest of the weir is ________ half the height of water above the weir crest.

A

Equal to

B

Less than

C

More than

D

None of these

In discharge of water over narrow crested weir, discharge is directly proportional to the cube root of acceleration due to gravity.

A

True

B

False

The discharge over a rectangular weir, considering the velocity of approach, is (where H₁ = H + H_a)
(H₁ = Total height of water above the weir, H = Height of water over the crest of the weir and H_a = Height of water due to velocity of approach)

A

$$\frac{2}{3}{{\text{C}}_{\text{d}}} \times {\text{L}}\sqrt {2{\text{g}}} \left$$

B

$$\frac{2}{3}{{\text{C}}_{\text{d}}} \times {\text{L}}\sqrt {2{\text{g}}} \left$$

C

$$\frac{2}{3}{{\text{C}}_{\text{d}}} \times {\text{L}}\sqrt {2{\text{g}}} \left$$

D

$$\frac{2}{3}{{\text{C}}_{\text{d}}} \times {\text{L}}\sqrt {2{\text{g}}} \left$$

A weir is said to be narrow-crested, if the width of the crest of the weir is Where H = height of water above weir crest

A

equal to H

B

more than H

C

less than H

D

None of the above

In a broad-crested weir, the discharge is maximum if the head of water on the downstream side of weir is __________ the head of water on the upstream side of weir.

A

Equal to

B

One-third

C

Two-third

D

Three-fourth

Consider the following statements: 1. If x is directly proportional to z and y is directly proportional to z, then (x2 - y2) is directly proportional to z2. 2. If x is inversely proportional to z and y is inversely proportional to z, then (xy) is inversely proportional to z2. Which of the above statements is/are correct?

A

1 only

B

2 only

C

Both 1 and 2

D

Neither 1 nor 2

In discharge of water over narrow crested weir, discharge is directly proportional to the second power of height.

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