If the upstream face of the spillway is kept vertical, the crest shape should also confirm to the lower nappe of an inclined sharp-crested weir.

Statement (I): The ogee spillway is a control weir having an S-shaped crest profile which provides a high discharge coefficient without causing cavitations. Statement (II): The crest profile of ogee spillway conforms to the lower nappe of flow over a ventilated sharp-crested weir and ensures a constant discharge coefficient for all heads.

A

Both Statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I)

B

Both Statement (I) and Statement (II) are individually true but Statement (II) is not the correct explanation of Statement (I)

C

Statement (I) is true but Statement (II) is false

D

Statement (I) is false but Statement (II) is true (II) is true:

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 passing over an ogee spillway is given by (where, L is effective length of spillway crest and H is the total head over the spillway crest including velocity head.)

A

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

B

$${\text{CH}}{{\text{L}}^{\frac{3}{2}}}$$

C

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

D

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

When the crest of an ogee spillway is designed to be in accordance with the lower nappe of a free-falling water jet over a duly ventilated sharp-crested weir then theoretically

A

The pressure on the spillway crest will be zero at design head only

B

The pressure on the spillway crest will always be zero

C

The pressure on the spillway crest will always be negative

D

The pressure on the spillway crest will be always positive

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

An ogee spillway of a concrete gravity dam having FRL of 328 m and MWL of 340 m is provided with vertical gates between piers erected on the spillway. The effective length of the spillway is 60 m. The discharge through the spillway when gates are opened up to the actual reservoir level of 331.0 m will be_____________

A

850 cumecs

B

1700 cumecs

C

2800 cumecs

D

1000 cumecs

A, B, C, D, E and F are six girls who use 6 different face wash – Pond’s, Lakme, Lotus, Garnier, Himalaya and Kaya (but not necessarily in the same order). They also like six different colours – Red, Blue, Brown, Peach, Black and White (also not necessarily in the same order. A and C do not like a Red colour. The girl who uses Lakme face wash likes Peach colour. The girl who likes White colour does not use Kaya nor Lotus face wash. B neither likes Peach nor Red colour. D does not like a Blue colour but uses a Lotus face wash. The girl who uses Pond’s face wash likes Red colour. C does not use Lakme face wash nor likes white colour. F neither uses Himalaya nor Kaya face wash but likes Brown colour. Who does use Himalaya’s face wash?

A

B

C

D

E

6 faces of a cube is painted with different colour. Red face is opposite to the black face. The face adjacent to the bottom face is white. Brown face is adjacent to blue face. Red face is at the bottom. Which face will be on exactly opposite to the brown face.

A

Red

B

Black

C

White

D

Blue

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

If the upstream face of the spillway is kept vertical, the crest shape should also confirm to the lower nappe of an inclined sharp-crested weir.

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