Name: ___________________________ S.S. No. _______________ Grade: _______

 

1. (25%) A 30^o vertical bend in a pipe having a 2.5-ft diameter carries water at the rate of 80 cfs. The pressure at the lower end, at elevation 320 ft, is 14 psi, and at the upper end, at elevation 323 ft, is 13 psi. (See Prob. 5-48). What is the vertical component of the force that must be exerted by the anchor on the bend to hold it in place? The bend itself weighs 400 lbs, and the length of the bend is 5 ft.

2. (25%) A reservoir is oval shaped and the fetch is 10 miles. The wind velocity in the direction of the fetch is 70 mph. The average reservoir height is 80 ft, and the dam is 150 ft high. What is the freeboard if the upstream slope is well designed riprap with slope 1 V to 3 H. Freeboard is to be based on the wave height exceeded by 10% of the waves. Assume settlement 1% of dam depth, and a reasonable addition for contingencies.

3. (25%) A culvert is to be designed for a 10-yr flood. The design discharge is 150 cfs. The inlet invert elevation is at 200 ft, natural stream bed slope = 0.02, tailwater depth above outlet invert = 2 ft, culvert length= 150 ft, and roadway shoulder elevation = 210 ft. Design a concrete culvert for these conditions. Assume n= 0.012, K_e= 0.5, K_E= 1, minimum freeboard= 2 ft, square edge with headwalls, f= 0.018. Determine if the culvert will be under inlet or outlet control.

4. (25%) For the pump with performance curve attached, what discharge in cubic meters per second will occur when the 30-cm pump is operating against a 3-m head at a speed of 720 rpm? What power in kilowatts is required for these conditions?