Water Supply and Sanitary

361) The content of total solids in drinking water shall not be greater than

Discuss in Comment

500 mg/l

362) Concentration of fluorides desirable in water is

Discuss in Comment

not greater than 1 mg/l

363) A main disadvantage of chlorine as disinfectant is

Discuss in Comment

it may cause cancer

364) Besides disinfection chlorination is effective in the removal of

Discuss in Comment

colour

365) Presence of (residual) chlorine is readily detected by

Discuss in Comment

orthotolidine

366) Blow off valves are a must when

Discuss in Comment

dead ends exist

367) The valve that is most commonly provided on rising mains is

Discuss in Comment

reflux valve

368) Air valves are provided at

Discuss in Comment

summits

369) A goose neck is

Discuss in Comment

a bent flexible pipe provided between ferrule and stop cock

370) The hourly variation factor is usually taken as

Discuss in Comment

2.7

Subject Notes

Objective Box

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