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Civil Engineering - Water Resources Engineering

Exercise : Water Resources Engineering - Section 3
41.
Isopiastic lines are the contours
drawn to represent water table
drawn to represent piezometric heads
drawn to piezometric surface
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
42.
The coefficients of permeability of soils of an unconfined aquifer and another confined aquifer were determined by pumping water from the wells and observing the effect of water table in two test wells at equal distances was found to be equal. The total height of confined aquifer H is given by
H = h2 - h1
H = h1 - h2
H = h2 + h1
(h1 + h2)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
43.
The radius of influence is
radius of the main well
distance from the wall of main well to the point of zero draw down
distance from the centre of main well to the point of zero draw down
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
44.
When a constant discharge 2.91 litres/sec. was obtained in a pumping test, the draw downs in the test wells at 3 m and 6.184 m were 2.6 m and 0.3 m respectively. If over-all depth of the pumping well was 16 m, the permeability of the soil, is
0.0005 cm/sec
0.001 cm/sec
0.002 cm/sec
0.01 cm/sec.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
45.
If ω is unit weight of water, Q the discharge in cumecs, H the total head lift and η, the efficiency of the pump, the H.P. of the motor is
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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