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.

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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.

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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.

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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

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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.

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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

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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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