Question

The discharge through an orifice fitted in a tank can be increased by : 

(a) Fitting a short length of pipe to the outside 

(b) Sharpening the edge of orifice 

(c) Fitting a long length of pipe to the outside 

(d) Fitting a long length of pipe to the inside

Answer 1

(a) Fitting a short length of pipe to the outside 

By fitting long pipe discharge will be more but less in comparison of short length pipe due to more friction loss in long pipe. 

When pipe is fitted outside in that case coefficient of discharge is around 0.82 and when it fitted inside then same is of 0.75. So, pipe of short length fitted outside give more discharge