Environmental Engineering [1]
16) The quality of tube well water is ................. as
compared to surface water.
17) The continuous flow of water may be expected from
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(a) surface springs
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(b) artesian springs
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(c) gravity springs
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(d) all of these
18) The layers such as sand and gravel which allow the
water to pass through them are known as
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(a) previous layers
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(b) aquifers
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(c) water bearing strata
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(d) all of these
19) Which of the following statement is correct ?
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(a) The sub-surface sources are not affected by draught.
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(b) Infiltration galleries are most suitable for increasing the surface source supply, in dry season.
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(c) The rate at which water percolates into well under safe maximum critical depression head is called yield of well.
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(d) all of the above
20) The artesian spring has too much hydraulic gradient
and water flows out automatically.
