The sheet of water flowing over a notch or a weir is known as

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

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

The discharge over the trapezoidal notch is equal to the discharge over the rectangular notch __________ the discharge over the triangular notch.

A

Plus

B

Minus

C

Divide

D

None of these

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

When the water level on the downstream side of a weir is above the top surface of a weir, the weir is known as

A

Narrow-crested weir

B

Broad-crested weir

C

Ogee weir

D

Submerged weir

The discharge over a right angled notch is (where H = Height of liquid above the apex of notch)

A

$$\frac{8}{{15}}{{\text{C}}_{\text{d}}} \times 2{\text{g}} \times {\text{H}}$$

B

$$\frac{8}{{15}}{{\text{C}}_{\text{d}}} \times 2{\text{g}} \times {{\text{H}}^{\frac{3}{2}}}$$

C

$$\frac{8}{{15}}{{\text{C}}_{\text{d}}} \times 2{\text{g}} \times {{\text{H}}^2}$$

D

$$\frac{8}{{15}}{{\text{C}}_{\text{d}}} \times 2{\text{g}} \times {{\text{H}}^{\frac{5}{2}}}$$

A weir is used to measure the large water discharge rate from a river or from an open channel. A weir is not of __________ shape.

A

Circular

B

Rectangular

C

Triangular

D

Trapezoidal

The discharge through a V-notch weir varies as

A

$${{\text{H}}^{\frac{3}{2}}}$$

B

$${{\text{H}}^{\frac{1}{2}}}$$

C

$${{\text{H}}^{\frac{5}{2}}}$$

D

$${{\text{H}}^{\frac{2}{3}}}$$

The Cipoletti weir is a __________ weir.

A

Rectangular

B

Triangular

C

Trapezoidal

D

Circular

As compared to crest of the normal portion of the weir, the crest of the under sluice portion of weir is kept at

A

lower level

B

higher level

C

same level

D

any of the above depending on the design

The sheet of water flowing over a notch or a weir is known as

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