Environmental Engineering in CE From pollution control point of view, the maximum permissible concentration of sulphur dioxide in atmospheric air is about __________ ppm. 500 1 50 5 500 1 50 5 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Maximum permissible residual chlorine in treated water should be __________ mg/litre. 2 to 3 02 to 0.3 5 to 10 0.001 to 0.01 2 to 3 02 to 0.3 5 to 10 0.001 to 0.01 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 In vacuum filter By chemical coagulation In sedimentation tanks equipped with mechanical scrapper In clarifiers In vacuum filter By chemical coagulation In sedimentation tanks equipped with mechanical scrapper In clarifiers ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Salt content in sea water is about __________ percent. 0.5 10 3.5 1 0.5 10 3.5 1 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE The pH value of potable water should be between 4 to 5 13 to 14 6.5 to 8 1 to 1.5 4 to 5 13 to 14 6.5 to 8 1 to 1.5 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Shouting by a man at his full voice corresponds to a voice level of about __________ decibels. 120 80 50 25 120 80 50 25 ANSWER DOWNLOAD EXAMIANS APP
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