Disinfection of water is done to remove ______________________?
Disinfection of water is done to remove ______________________?
A. Color
B. Bad taste
C. Foul odour
D. Bacteria
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Turbidity of water is an indication of the presence of__________________?
Turbidity of water is an indication of the presence of__________________?A. Suspended inorganic matter
B. Dissolved solids
C. Floating solids
D. Dissolved gasesCOD of raw municipal sewage may be in the range of about _____________ mg/litre?
COD of raw municipal sewage may be in the range of about _____________ mg/litre?A. 1-2
B. 5-10
C. 90-120
D. 1500-2500Oilish impurities present the effluent discharged from the electroplating industry is normally not removed by _____________________?
Oilish impurities present the effluent discharged from the electroplating industry is normally not removed by _____________________?A. Chemical coagulation
B. Floatation & skimming
C. Centrifugation
D. Ultra filtrationWhich of the following is a green house gas other than CO2 ?
Which of the following is a green house gas other than CO2 ?A. Methane
B. Nitrous oxide
C. Chlorofluoro carbons (CFC)
D. All A., B. and C.Pick out the one which is not a chemical coagulant ?
Pick out the one which is not a chemical coagulant ?A. Aluminium sulphate
B. Ferrous sulphate
C. Hydrated lime
D. ChloramineInhalation of silica dust by human being during hand drilling in mica mining, lead & zinc mining, silica refractory manufacture and in foundries causes___________________?
Inhalation of silica dust by human being during hand drilling in mica mining, lead & zinc mining, silica refractory manufacture and in foundries causes___________________?A. Asphyxiation (suffocation)
B. Shortness of breath
C. Tuberculosis
D. All A., B. and C.