- (A) Foaming from boilers
- (B) Its dissolved oxygen content
- (C) Its silica content
- (D) Caustic embrittlement
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- (A) Mercury
- (B) Brine
- (C) Phosphate
- (D) None of these
- (A) Highly
- (B) Moderately
- (C) Extremely
- (D) Very extremely
- (A) Phosgene
- (B) Methyl isocyanate (MIC)
- (C) Carbon monoxide
- (D) Sulphur dioxide
- (A) By chemical coagulation
- (B) In sedimentation tanks equipped with mechanical scrapper
- (C) In vacuum filter
- (D) In clarifiers
- (A) Dissolved gases
- (B) Suspended solids
- (C) Dissolved solids
- (D) None of these
- (A) CO
- (B) SO2
- (C) NO2
- (D) CO2
- (A) Lagooning
- (B) Activated carbon adsorption
- (C) Biological oxidation pond
- (D) Chemical coagulation
- (A) Chemical oxygen demand (COD) is a measure of chemically oxidisable organic matter present in water
- (B) COD is determined by oxidising the organic matter present in water with potassium dichromate in cone, sulphuric acid solution at boiling temperature for specified time
- (C) CO
- (D) is related to BO
- (A) 0.01
- (B) 0.1
- (C) 1
- (D) 4
