1.A water contains a suspended solids concentration of 10.30 mg/L. Coagulation reduces this to 1.0 mg/L. To accomplish this, an alum dose of 13.30 mg/L is necessary. What is the dry weight of sludge produced in kg/day if the plant treats water at a rate of 1.884 m3/s?
2.A 10 inch steel pipeline 100 feet long carriers 2000 gpm of crude oil. Calculate the head loss when the oil is at a) 80 degree F b) 110 degree F
3.A ball is released from the bottom of an elevator which is travelling upward with a velocity of 2m/s. If the ball strikes the bottom of the elevator shaft in 3s, determine the height of the elevator from the bottom of the shaft at the instant the ball is released.Also find the velocity of the ball when it strikes the bottom of the shaft.