A. 2.5 to 3.0 m/sec
B. 3.0 to 4.0 m/sec
C. 3.5 to 4.5 m/sec
D. 4.5 to 5.5 m/sec
A. Large suspended organic solids
B. Oil and grease
C. Sand and girt
D. Floating materials
A. 1 in 5
B. 1 in 10
C. 1 in 15
D. 1 in 20
A. Thyroid
B. Kidneys
C. Eyes
D. Ovaries/testis
A. cm/minute
B. cm/hour
C. cm/day
D. None of these
A. 25 to 50 m
B. 50 m to 100 m
C. 100 m to 150 m
D. 150 m to 300 m
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
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