Description : How long does it take chlorine to dissipate from treated water?
Last Answer : 24 hours should do it.
Description : Municipal water in India is generally treated with (a) Chlorine (b) Potassium permanganate (c) Sodium Chloride (d) Sodium Carbonate
Last Answer : Ans:(a)
Description : Maximum permissible residual chlorine in treated water should be __________ mg/litre. (A) 0.001 to 0.01 (B) 0.2 to 0.3 (C) 2 to 3 (D) 5 to 10
Last Answer : (B) 0.2 to 0.3
Description : Raw water treated with only chlorine, is known as (A) Plain chlorination (B) Pre-chlorination (C) First-chlorination (D) De-chlorination
Last Answer : (A) Plain chlorination
Description : Who said that what is needed is an understanding of technology from inside, both as a body of knowledgeand as a social system. Instead, technology is often treated as a ‘‘black box’’ whose contentsand behaviour may be assumed to be common knowledge. a. Layton. b. Rolston III. c. Hume. d. John Locke.
Last Answer : a. Layton.