Civil Engineering - Water Supply Engineering

1.
The most commonly used chemical for dechlorination of water, is
sodium thiosulphate
sodium bisulphate
sodium sulphite
sulphur-dioxide
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

2.
The prescribed hardness limit of potable water ranges between
50 to 75 P.P.M.
75 to 115 P.P.M.
100 to 150 P.P.M.
150 to 200 P.P.M.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

3.
For centrifugal pumps
initial cost is low
limited space is required
the discharge obtained is steady and non-pulsating
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

4.
The cast iron pipes for water supply system are used for
durability
strength
easy connection
low maintenance cost
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

5.
For plain chlorination of water, the quantity of chlorine used, is
0.1 mg/litre
0.2 mg/litre
0.3 mg/litre
0.4 mg/litre
0.5 mg/litre.
Answer: Option
Explanation:
No answer description is available. Let's discuss.