Environmental Engineering in CE Maximum permissible limit of industrial noise as recommended by World Health Organisation (WHO) is __________ decibels. 35 75 95 105 35 75 95 105 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Scale formation in boiler is controlled by Keeping the pH value of feed water just below 7 Preheating of feed water Reduction in hardness, silica & alumina in feed water Eliminating H₂S in feed water Keeping the pH value of feed water just below 7 Preheating of feed water Reduction in hardness, silica & alumina in feed water Eliminating H₂S in feed water ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which is the most practical and economical method for removal of suspended solid matter from polluted water? Sedimentation Skimming off Biological oxidation Chlorination Sedimentation Skimming off Biological oxidation Chlorination ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following is the most widely used disinfectant in water treatment? Cation exchanger Irradiation of water by ultraviolet light Chlorine Coagulation Cation exchanger Irradiation of water by ultraviolet light Chlorine Coagulation ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Threshold Limit Value (TLV) is the maximum allowable concentration (i.e. safe limit) of pollutants in air. Safe limit for SO₂ in air is __________ ppm. 1000 5 2000 500 1000 5 2000 500 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE In troposphere (the weather domain), the temperature 't' at height 'h' above the spa level in metres is given by (where, temperature at sea level is 15°C and t is in °C.) t = 15 + 0.0065h t = 15 - 0.0035h t = 15 - 0.0065h t = 0.0035h -15 t = 15 + 0.0065h t = 15 - 0.0035h t = 15 - 0.0065h t = 0.0035h -15 ANSWER DOWNLOAD EXAMIANS APP
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