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 In sedimentation tanks equipped with mechanical scrapper In vacuum filter By chemical coagulation In clarifiers In sedimentation tanks equipped with mechanical scrapper In vacuum filter By chemical coagulation In clarifiers ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Maximum allowable concentration of CO₂ in air for safe working is __________ ppm (parts per million). 1000 2000 5000 50 1000 2000 5000 50 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE In sewage treatment, its sedimentation is speeded up by commonly adding Sodium sulphate Hydrochloric acid Lime Copper sulphate Sodium sulphate Hydrochloric acid Lime Copper sulphate ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE When the concentration of SO₂ in air is greater than __________ ppm, it gives a pungent smell. 0.1 0.01 1 4 0.1 0.01 1 4 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE In a sedimentation tank, the detention period for water ranges from __________ hours. 24 to 32 2 to 4 8 to 12 16 to 20 24 to 32 2 to 4 8 to 12 16 to 20 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Thermal pollution due to excessive heat & temperature in the working place causes Reduction in working efficiency of manpower Fatigue All of these High breathing rate Reduction in working efficiency of manpower Fatigue All of these High breathing rate ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS