The flow velocity of water in a sedimentation tank is generally kept as
- A0.3 cm / min
- B3 cm / min
- C30 cm / minCorrect
- D300 cm / min
Solution
Concept
Flow velocity in a sedimentation tank
Formula
Vf ≈ 0.3 m/min
Step-by-step solution
1. The horizontal flow velocity is kept low, about 0.3 m/min. 2. 0.3 m/min = 30 cm/min.
Explanation
The velocity must be low enough for particles to settle.
Why the other options are wrong
Other values are 10 times too small or too large.
Shortcut
0.3 m/min = 30 cm/min.
Correct answer: C) 30 cm / min