Question 61 : The ozone generators can convert ____ % of feed oxygen into ozone.
1. 1
2. 5
3. 1-4
4. 10
View Answer   Discuss with Members

Question 62 : At what pH, chlorine exists as molecular chlorine?
1. 3
2. 5
3. <5
4. <10
View Answer   Discuss with Members

Question 63 : The dimensional formula of rate constant used in Chicks law is
1. 1/t
2. 1/t²
3. 1/t³
4. t²
View Answer   Discuss with Members

Question 64 : Which of the following is wrong regarding disinfection?
1. It should be readily available at reasonable cost
2. Its method of application should be simple
3. It should render the water toxic for its intended use
4. It should act as safeguard against re-contamination
View Answer   Discuss with Members

Question 65 : Which type of chloramine is formed when pH of water is 4.4?
1. Monachloramine
2. Dichloramine
3. Trichloramine
4. Both monochloramine and dichloramine
View Answer   Discuss with Members

Question 66 : The normal dose of chlorine during plain chlorination is
1. 0.5-1ppm
2. 0.1-0.2ppm
3. 0.1-0.5ppm
4. 1-2ppm
View Answer   Discuss with Members

Question 67 : The efficiency of chlorine increase by
1. Presence of metallic compounds
2. When the pH of the water increases
3. When the pH of the water decreases
4. Turbid water
View Answer   Discuss with Members

Question 68 : For changing the concentration of disinfectant, the disinfecting efficiency is expressed by
1. C n *t p = Constant
2. C n/ t p = Constant
3. C q * Np = Constant
4. C q / Np = Constant
View Answer   Discuss with Members