Environmental Engineering In Ce - Study Mode
[#176] Inhalation of silica dust by human being during hand drilling in mica mining, lead & zinc mining, silica refractory manufacture and in foundaries causes
Correct Answer
(D) All of the above
[#177] The term Biological Oxygen Demand (BOD) is used in relation to
Correct Answer
(D) Industrial effluents
[#178] Suspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by
Correct Answer
(B) Radial settling tank (thickener) using coagulant (lime & ferrous sulphate)
[#179] Irradiation of water by ultraviolet light of suitable wavelength is commonly used for disinfection of water in
Correct Answer
(A) Food industry
[#180] Main pollutants released from petroleum refineries is
Correct Answer
(A) CO, SO 2 & H 2 S