A bed of uniform sand having particle size of 0.65 mm diameter and specific gravity 2.66, porosity 0.48 and depth 75 cm is to be washed hydraulically. Assume (ν = 1.3 × 10-2 cm2 / sec), CD = 24 / R
Which of the following is / are true1
Backwash rate so that expansion will be 50 percent is 0.0432 m / s
2
Backwash rate so that expansion will be 50 percent is 0.0432 cm / s
3
Head loss at this rate is 0.6474 m
4
Head loss at this rate is 0.6474 cm