Civil Engineering MCQs

2965 MCQs  (Page 286 of 297)

In a grit chamber of a sewage treatment plant ____________________?
A. Flow velocity 0.15 m to 0.3 m/sec is kept
B. Depth of 0.9 m to 1.20 m is kept
C. One minute of detention period is kept
D. All the above
Primary treatment of sewage consists of removal of__________________?
A. Large suspended organic solids
B. Oil and grease
C. Sand and girt
D. Floating materials
Maximum permissible velocity 1.5 m/sec, is adopted in drains_______________________?
A. With beds of rocks and gravels
B. Lined with stones
C. Both a. and b.
D. Neither a. nor b.