Civil Engineering - Water Supply Engineering
Exercise :: Water Supply Engineering - Section 3
| 1. |
The most commonly used chemical for dechlorination of water, is |
| A. |
sodium thiosulphate | | B. |
sodium bisulphate | | C. |
sodium sulphite | | D. |
sulphur-dioxide | | E. |
all the above. |
Answer: Option C
Explanation:
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| 2. |
The prescribed hardness limit of potable water ranges between |
| A. |
50 to 75 P.P.M. | | B. |
75 to 115 P.P.M. | | C. |
100 to 150 P.P.M. | | D. |
150 to 200 P.P.M. | | E. |
none of these. |
Answer: Option B
Explanation:
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| 3. |
For centrifugal pumps |
| A. |
initial cost is low | | B. |
limited space is required | | C. |
the discharge obtained is steady and non-pulsating | | D. |
all the above. |
Answer: Option D
Explanation:
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| 4. |
The cast iron pipes for water supply system are used for |
| A. |
durability | | B. |
strength | | C. |
easy connection | | D. |
low maintenance cost | | E. |
all the above. |
Answer: Option E
Explanation:
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| 5. |
For plain chlorination of water, the quantity of chlorine used, is |
| A. |
0.1 mg/litre | | B. |
0.2 mg/litre | | C. |
0.3 mg/litre | | D. |
0.4 mg/litre | | E. |
0.5 mg/litre. |
Answer: Option E
Explanation:
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