railway RRB JE (CBT I + CBT II) Mock Test 2024 Fluid Mechanics Flow Through Pipes Water Hammer in Pipe
The valve closure is said to be gradual if the time required to close the valve is:
1
\(t = \frac{{2L}}{c}\)
2
\(t \le \frac{{2L}}{c}\)
3
\(t < \frac{{4L}}{c}\)
4
\(t > \frac{{2L}}{c}\)