Water Treatment – Section 1

16. Which of the following physical method is used as germicidal in modern time for the treatment of drinking water?

A. Chlorination
B. Treating with potassium permanganate
C. UV radiation
D. Treating with bleaching powder

Correct Answer: C. UV radiation

17. Sanitizer used specifically for vitreous enamel are

A. strong alkalis
B. strong acids
C. weak alkali with sodium silicate
D. none of these

Correct Answer: C. weak alkali with sodium silicate

18. The common methods used for disinfection in wastewater treatment plants are

A. chlorination
B. UV light
C. both (a) and (b)
D. Phenolic solvent

Correct Answer: C. both (a) and (b)

19. Inhibitors are used along with sanitizer to

A. improve their action
B. to prevent corrosion
C. both (a) and (b)
D. none of these

Correct Answer: B. to prevent corrosion

20. Sanitizers used for rubber made equipment are

A. strong acids
B. strong alkalis
C. combination of both
D. none of these

Correct Answer: B. strong alkalis

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