Environmental Engineering in CE Lagoons used for purification of polluted water Are large shallow artificial lakes also known as clarification lakes, maturation ponds or oxidation ponds Use micro-organisms/bacteria in presence of dissolved oxygen All of these Gives an excellent final effluent (with 3 to 4 lagoons arranged in series) having suspended solid < 1 mg/litre and BOD = 3.8 mg/litre Are large shallow artificial lakes also known as clarification lakes, maturation ponds or oxidation ponds Use micro-organisms/bacteria in presence of dissolved oxygen All of these Gives an excellent final effluent (with 3 to 4 lagoons arranged in series) having suspended solid < 1 mg/litre and BOD = 3.8 mg/litre ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Inhalation of silica dust by human being causes Tuberculosis Asphyxiation Both B & C Shortness of breath Tuberculosis Asphyxiation Both B & C Shortness of breath ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following radioactive wastes emits all α, β & γ rays and hence is the most hazardous of all radioactive emitters? Ra-226 I-131 Au-198 Sr-90 Ra-226 I-131 Au-198 Sr-90 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Noise emitted by a ventilation fan at a distance of 3 metres is about __________ decibels. 145 85 105 125 145 85 105 125 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The common pollutant generated in chlor-alkali industry and battery manufacture is Mercury None of these Phosphate Brine Mercury None of these Phosphate Brine ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Methyl iso-cynate (MIC) gas (TLV <1 ppm), which caused Bhopal gas tragedy in 1984 falls under the category of __________ toxic gas. Very extremely Extremely Moderately Highly Very extremely Extremely Moderately Highly ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS