A. 25 to 50 m
B. 50 m to 100 m
C. 100 m to 150 m
D. 150 m to 300 m
Inter-distance between ventilation columns in a sewer line is kept__________________? Read More »
Civil Engineering Mcqs, Waste Water Engineering A. Vs = 418 (Gs – Gw) d [(3T + 70)/100]
B. Vs = 418 (Gs – Gw)d² [(3T + 70)/100]
C. Vs = 218 (Gs – Gw)d² [(3T + 70)/100]
D. Vs = 218 (Gs – Gw)d [(3T + 70)/100]
A. Aeration is continued till stability
B. Aeration is done with an admixture of previously aerated sludge
C. Sludge is activated by constant stirring
D. Water is removed by centrifugal action
In the activated sludge process__________________? Read More »
Civil Engineering Mcqs, Waste Water Engineering A. d/D = ½ (1 – –
B. a/A
C. r/R = [1 –
D. All the above
A. 1.39 m
B. 1.49 m
C. 1.59 m
D. 1.69 m
A. With beds of rocks and gravels
B. Lined with stones
C. Both A. and B.
D. Neither A. nor B.
Maximum permissible velocity 1.5 m/sec, is adopted in drains_______________________? Read More »
Civil Engineering Mcqs, Waste Water Engineering A. 2 days
B. 7 days
C. 12 days
D. 14 days
A. 30 to 40%
B. 40 to 60%
C. 60 to 80%
D. 80 to 90%
In trickling filter, B.O.D. is reduced to___________________? Read More »
Civil Engineering Mcqs, Waste Water Engineering A. 10 days
B. 20 days
C. 30 days
D. 60 days
In normal conditions, the period for sludge digestion, is_______________? Read More »
Civil Engineering Mcqs, Waste Water Engineering A. 10 cm
B. 15 cm
C. 20 cm
D. All the above
are available in size Stoneware sewers________________? Read More »
Civil Engineering Mcqs, Waste Water Engineering