Environmental Engineering in CE In sewage treatment, the detention period allowed for oxidation ponds ranges from __________ weeks. 9 to 10 15 to 20 1 to 2 4 to 5 9 to 10 15 to 20 1 to 2 4 to 5 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE TLV of ammonia, nitrogen dioxide and phenol vapor in air is __________ ppm. 2000 1000 5 100 2000 1000 5 100 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Coal washing waste water containing about 3% suspended solids (comprising of clay, slate, stone etc.) is treated for solid particles removal By chemical coagulation In vacuum filter In clarifiers In sedimentation tanks equipped with mechanical scrapper By chemical coagulation In vacuum filter In clarifiers In sedimentation tanks equipped with mechanical scrapper ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Operating principle of cyclone separator is based on the action of __________ dust particles. Diffusion of Electrostatic force on Gravitational force on Centrifugal force on Diffusion of Electrostatic force on Gravitational force on Centrifugal force on ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following causes death by asphyxiation, if its presence in atmospheric air exceeds maximum allowable concentration (i.e. > 50 ppm)? Carbon monoxide Peroxyacyl nitrate Sulphur dioxide Benzopyrene Carbon monoxide Peroxyacyl nitrate Sulphur dioxide Benzopyrene ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The disinfection efficiency of chlorine increases by(i) Decreasing the time of contact(ii) Decreasing the temperature of water(iii) Increasing the temperature of water Only (i) Only (iii) Both (i) and (ii) Both (i) and (iii) Only (i) Only (iii) Both (i) and (ii) Both (i) and (iii) ANSWER DOWNLOAD EXAMIANS APP
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