- (A) removal of turbidity
- (B) removal of hardness
- (C) killing of disease bacteria
- (D) complete sterilisation
Civil Engineering Mcqs
- (A) to increase the filtration slow sand filters capacity of
- (B) to increase the filtration rapid sand filters capacity of
- (C) for isolated buildings like pools, hotels etc swimming
- (D) all of the above
- (A) only (1)
- (B) both (1) and (2)
- (C) both (1) and (3)
- (D) only (3)
- (A) prechlorination
- (B) post chlorination
- (C) super chlorination
- (D) break point chlorination
- (A) prechlorination
- (B) super chlorination
- (C) dechlorination
- (D) hypochlorination
- (A) carbon dioxide
- (B) bleaching powder
- (C) sulphur dioxide
- (D) chloramines
- (A) smaller
- (B) larger
- (C) same
- (D) none of the above
- (A) only carbonate hardness is removed
- (B) only non-carbonate hardness is re-moved
- (C) lime reduces the carbonate hardness and soda-ash removes the non-carbo¬nate hardness
- (D) lime reduces the non-carbonate hard-ness and soda-ash removes the carbo¬nate hardness
- (A) sodium sulphate
- (B) copper sulphate
- (C) sodium chloride
- (D) calcium chloride
- (A) 500 to 750 litres/hour/ m2
- (B) 1000 to 1250 litres/hour/ m2
- (C) 1250 to 1500 litres/hour/m2
- (D) 1500 to 2000 litres/hour/m2
