141. A stepped notch is a combination of

A. rectangular notches of different sizes

B. triangular notches of different sizes

C. rectangular and triangular notches

D. all the abave.

142. The ratio of the percentage error in the discharge and percentage error in the measurement of head, over rectangular notch, is

A. 1/2

B. 2/3

C. 3/2

D. 3/4.

143. The ratio of the percentagge error in the discharge and percentage error in the measurement of head over a triangular notch, is

A. 2/3

B. 3/2

C. 2/5

D. 5/2.

144. If H is height of the liquid above the sill, the effect of end contractions, according to Francis formula, is

A. 0.1 H

B. 0.2 H

C. 0.3 H

D. 0.4 H

145. Cappoletti weir is a

A. rectangular weir whose length is kept 3 times the height of the water above sill

B. triangular weir whose notch angle is 90?

C. trapezoidal weir, whose sides slope 1 horizontal to 2 verticals

D. a combination of rectangular and triangular weirs.

146. The thickness of a sharp crested weir is kept less than

A. one-third of the height of water on the sill

B. one-half of the height of water on the sill

C. one-fourth of the height of water on the sill

D. two-third of the height of water on the sill

147. Discharge over an ogee weir remains the same as that of

A. sharp crested weir

B. triangular weir

C. cippoletti weir

D. drowned weir.

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