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Saturday, September 13, 2008

Community Dentistry MCQ 05

Saturday, September 13, 2008

The amount of good quality bleaching powder required for chlorinating a round well measuring 4 mtrs diameter and depth of water column 6 mtrs, to get 1PPM of residual chlorine when the Horrock’s test gives definite blue colour in the 3rd cup onwards, is

a. 993.8 grams
b. 99.38 grams
c. 9.938 grams
d. 0.9938 grams



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