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Civil Engineering - Water Supply Engineering

Exercise : Water Supply Engineering - Section 7
26.
Pick up the correct statement from the following :
The ratio of the total sediment deposited in the reservoir to the total sediment flowing in the river, is called trap efficiency
The ratio of the reservoir capacity to the total inflow of water in it, is generally called capacity inflow ratio
Small capacity reservoirs on large rivers generally, silt less
Large capacity reservoirs on small rivers generally silt more
All the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
Pressure relief valves are provided in water mains
to reduce the pressure
at low points
upstream of sluice
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
Pick up the incorrect statement from the following :
Iron salts produce heavy flocs and hence remove more suspended matter
Iron salts remove hydrogen sulphides
Iron salts can be used over a limited range of pH values
Iron salts impart corrosiveness to water.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
The percentage of chlorine in fresh bleaching powder is roughly
50 to 60
30 to 35
40 to 50
20 to 25
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
Higher yield may be expected from
gravity springs
surface springs
artesian springs
all the above.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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