Environmental Engineering in CE Replenishment of dissolved oxygen in water stream polluted with industrial waste occurs by Photosynthetic action of algae Natural aeration of water stream Neither A nor B Both A & B Photosynthetic action of algae Natural aeration of water stream Neither A nor B Both A & B ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE TLV of mercury in potable (drinking) water is about __________ ppm. 0.001 5 1 0.1 0.001 5 1 0.1 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Which of the following pollutants is absent in the emissions from a fertiliser plant ? CO SO₂ & SO₃ NO₂ NH₃ CO SO₂ & SO₃ NO₂ NH₃ ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE If carbon monoxide content in atmospheric air exceeds __________ ppm, death is bound to occur. 3000 (i.e. 0.3%) 1000 500 50 3000 (i.e. 0.3%) 1000 500 50 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Maximum permissible limit of industrial noise as recommended by World Health Organisation (WHO) is __________ decibels. 75 95 105 35 75 95 105 35 ANSWER DOWNLOAD EXAMIANS APP
Environmental Engineering in CE Threshold limit value (TLV) i.e., the maximum permissible safe limit of phosgene gas which Hitler used to use to kill his enemies in 'gas chamber' is about __________ ppm. 100-200 100-1000 10-100 100-200 100-1000 10-100 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS