225.  Pick up the correct statement regarding convergent divergent mouth piece from the following :
A. It converges upto Venacontracta and then diverges
B. In this mouth piece there is no loss of energy due to sudden enlargement
C. The coefficient of discharge is unity
D. All the above.

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226. The mouth piece shown in Fig. 7.3 is generally known as
A. Internal mouth piece
B. Re-entrant mouth piece
C. Borda's mouth piece
D. All the above.

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227. Pick up the correct statement from the following :
A. When the length of the tube is equal to diameter of the internal mouth piece, the jet of liquid comes out without touching the sides of the tube
B. When the length of the tube is three times the diameter
C.
D.

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228.  Pick up the correct statement regarding Borda's mouth piece running full from the following :
A. Actual velocity at the out let is ,liff
B. Theoretical velocity at the outlet is NI2gH
C. Coefficient of velocity is 1/Vi
D. All the above.

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229.  Pick up the incorrect statement from to following regarding triangular notch :
A. For measuring low discharge, it gives more accurate result
B. Only one reading (i.e. H) is required for computation of discharge
C. Ventilation is necessary
D. None of these.

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230.  Pick up the correct statement from the following :
A.Discharge over a triangular notch is proportional to H5I2
B. Discharge over a rectangular notch is proportional to H312
C. Both (a) and (b)
D. Neither (a) nor (b).

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231.  An error of 1% in measuring the head of water over the crest of a rectangular weir, produces an error in the discharge which is equal to
A.1.25%
B.1.50%
C.-1.75%
D. 2.25%.

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