Civil Engineering - Water Supply Engineering - Discussion

20. 

Pick up the correct statement from the following :

[A]. Detention period for plain sedimentation tanks ranges between 4 to 8 hours
[B]. Detention period for sedimentation tanks, using coagulants usually ranges between 2 to 4 hours
[C]. The horizontally flow velocity in sedimentation tanks, is generally limited to 0.3 m/minute
[D]. All the above.

Answer: Option D

Explanation:

No answer description available for this question.

Dev said: (Feb 12, 2017)  
A and C are correct because detention period for water using coagulants is 2-6 hours.

Hitler said: (Apr 21, 2017)  
All the given options are correct.

Vivek said: (Nov 30, 2017)  
According to me, it is The horizontally flow velocity in sedimentation tanks, is generally limited to 0.3 m/s not m/ min.

Ajay said: (Nov 20, 2018)  
Dt for plain sedimentation is 3-4hr.

Vivekanand Pandey said: (Dec 4, 2019)  
For plane sedimentation td is 24 hrs.

Spoo said: (Feb 8, 2020)  
0.3m/min is accurate.

Kuntal Meena said: (Feb 18, 2020)  
Plain sedimentation detention time 3-4 hrs and with coagulation 2-2.5 hrs and hrz. Velocity. 3 m/minute.

Kiran said: (Mar 2, 2020)  
Detention period: for plain sedimentation: 3 to 4 h, and for coagulated sedimentation: 2 to 2.5 h. Velocity of flow: Not greater than 30 cm/min (horizontal flow). Tank dimensions: L:B = 3 to 5:1.

Mira said: (Nov 29, 2020)  
Detention period for plain sedimentation is 3 to 4 hr and for coagulated sedimentation is 2 to 2.5 hr.

The horizontal flow velocity in the sedimentation tank is limited to 0.3m/min.

Post your comments here:

Name *:

Email   : (optional)

» Your comments will be displayed only after manual approval.