Q.1 The head of water over an orifice of diameter 40 mm is 10 m. Find the actual discharge and actual velocity of the jet at vena-contracta. Take Cd= 0.6 and Cv = 0.98. Q.2 The head of water over the centre of an orifice of diameter 20 mm is 1m. The actual discharge through the orifice is 0.85 litres/sec. Find the co-efficient of discharge. Q.3 A jet of water, issuing from a sharp-edged vertical orifice under a constant head of 10 cm, at a certain point, has the horizontal and vertical co-ordinates measured from the vena-contracta as 20cm and 15cm respectively. find the value of Cv, also find the value of Cc if Cd=0.6. Q.4 The head of water over an orifice of diameter100mm. The water coming out from orifice is collected in a circular tank of diameter 1.5 m. The rise of water level in this tank is 1.0 m in 25 seconds. Also the coordinates of a point on the jet, measured from vena-contracta are 4.3 m Horizontal and 0.5 m vertical. Find the coefficients Cd, Cv and Cc. Q.5 Find the discharge through a rectangular orifice 2.0 m wide and 1.5 m deep fited into a water tank. The water level in the tank is 3.0m above the top edge of the orifice. Take Cd = 0.62. Q.6 Find the discharge of water flowing over a rectangular notch of 2 m length when the constant head over the notch is 300 mm. Take Cd= 0.60 Q.7 Determine the height of a rectangular weir of length 6 m to be built across a rectangular channel. The maximum depth of water on the upstream side of the weir is 1.8m and discharge is 2000 litres/sec. Take Cd = 0.6 and neglected end contractions. Q.8 Water flows over a rectangular weir 1m wide a depth of 150 mm and after warts passes through a triangular right-angled weir. Taking Cd for the rectangular and triangular weir as 0.62 and 0.59 respectively, find the depth over the triangular weir. Q.9 A rectangular channel 2,0 m wide has a discharge of 250 litres per second, which is ensured by a right-angled V-notch weir. Find the position of the apex of the notch from the bed of the channel if the maximum depth a water not exceeded 1.3m. Take Cd = 0.62. Q.10 Water is flowing in a rectangular channel of 1m wide and 0.75 m deep Find the discharge over a rectangular weir of crest length 60cm if the head of water over the crest of weir is 20 cm and water from channel flows over the weir. Take Cd = 0.62. Neglect end contractions. Take velocity of approach into consideration.