Due to each end contraction, the discharge of rectangular sharp crested weir is reduced by

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

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

The discharge over a broad crested weir is maximum when the depth of flow is (where H is the available head)

A

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

B

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

C

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

D

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

The maximum discharge over a broad crested weir is

A

$$0.384{{\text{C}}_{\text{d}}} \times {\text{L}} \times {{\text{H}}^{\frac{1}{2}}}$$

B

$$0.384{{\text{C}}_{\text{d}}} \times {\text{L}} \times {{\text{H}}^{\frac{3}{2}}}$$

C

$$1.71{{\text{C}}_{\text{d}}} \times {\text{L}} \times {{\text{H}}^{\frac{1}{2}}}$$

D

$$1.71{{\text{C}}_{\text{d}}} \times {\text{L}} \times {{\text{H}}^{\frac{3}{2}}}$$

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

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

According to Francis formula, the discharge over a rectangular weir is (where n = Number of end contractions)

A

$$\frac{2}{3} \times {{\text{C}}_{\text{d}}}\left( {{\text{L}} - {\text{nH}}} \right) \times \sqrt {2{\text{gh}}} $$

B

$$\frac{2}{3} \times {{\text{C}}_{\text{d}}}\left( {{\text{L}} - 0.1{\text{nH}}} \right) \times \sqrt {2{\text{g}}} \times {{\text{H}}^{\frac{3}{2}}}$$

C

$$\frac{2}{3} \times {{\text{C}}_{\text{d}}}\left( {{\text{L}} - {\text{nH}}} \right) \times \sqrt {2{\text{g}}} \times {{\text{H}}^2}$$

D

$$\frac{2}{3} \times {{\text{C}}_{\text{d}}}\left( {{\text{L}} - {\text{nH}}} \right) \times \sqrt {2{\text{g}}} \times {{\text{H}}^{\frac{5}{2}}}$$

Rectangular ABCD is similar to rectangular EFGH. The length of each side of rectangle EFGH is 24 times the length of corresponding side of rectangle ABCD.The perameter of rectangular ABCD is 120 feet.What is the parameter of rectangular paramaeter EFGH?

A

288feet

B

345.6feet

C

576feet

D

691.2feet

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

Due to each end contraction, the discharge of rectangular sharp crested weir is reduced by

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