Waste Water Engineering In septic tanks, decomposition of organic bacteria, is done by Aerobic bacteria Anaerobic bacteria Both types of bacterias None of these Aerobic bacteria Anaerobic bacteria Both types of bacterias None of these ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The settling velocity of a spherical particle of diameter less than 0.1 mm as per Stock’s law, is Vs = 218 (Gs – Gw)d² [(3T + 70)/100] Vs = 218 (Gs – Gw)d [(3T + 70)/100] Vs = 418 (Gs – Gw) d [(3T + 70)/100] Vs = 418 (Gs – Gw)d² [(3T + 70)/100] Vs = 218 (Gs – Gw)d² [(3T + 70)/100] Vs = 218 (Gs – Gw)d [(3T + 70)/100] Vs = 418 (Gs – Gw) d [(3T + 70)/100] Vs = 418 (Gs – Gw)d² [(3T + 70)/100] ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering If the pH value of sewage is 7 None of these It is acidic It is neutral It is alkaline None of these It is acidic It is neutral It is alkaline ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering For the COD test of sewage, organic matter is oxidised by K₂Cr₂O₇ in the presence of HCl H₂SO₄ None of these HNO₃ HCl H₂SO₄ None of these HNO₃ ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering In case of Imhoff tanks, The shape is rectangular Detention period is 2 hours The velocity of flow is restricted to 0.30 m/minute All of these The shape is rectangular Detention period is 2 hours The velocity of flow is restricted to 0.30 m/minute All of these ANSWER DOWNLOAD EXAMIANS APP
Waste Water Engineering The drainage area of a town is 12 hectares. Its 40% area is hard pavement ( K = 0.85), the 40% area is unpaved streets (K = 0.20) and the remaining is wooded areas (K = 0.15). Assuming the time of concentration for the areas as 30 minutes and using the formula Ps = 900/(t + 60) the maximum run off is 0.12 cumec 0.15 cumec 0.10 cumec 0.20 cumec 0.12 cumec 0.15 cumec 0.10 cumec 0.20 cumec ANSWER DOWNLOAD EXAMIANS APP
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