Pick up the correct statement from the following : The precipitation during its

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Question
Pick up the correct statement from the following :
Options
A. The precipitation during its travel in atmosphere dissolves certain gases
B. Rain water which percolates through the ground, is free from suspended materials
C. Under ground water may dissolve minerals and salts present in the earth's layers
D. Small quantities of iron, calcium and magnesium dissolved in water, may be useful for human health
E. All the above.

Correct Answer

All the above.

Water Supply Engineering problems

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3. Pick up the correct statement from the following :
Options
A. Large solids carried along the river bed, is known as bed load
B. The bigger suspended particles get deposited in the head reaches of the reservoir
C. The fine sediment deposits are generally near the face of the dam
D. Deposition of sediment in the reservoir, reduces the capacity of the reservoir
E. All the above.

5. The joint used for joining the plain ends of cast iron pipes, is
Options
A. flanged joint
B. socket and spigot joint .
C. dresser coupling joint
D. flexible joint
E. expansion joint.

6. To pump water from a water reservoir 3 m deep and maximum water level at 135 m, a pump is installed to lift water up to R.L. 175 m at a constant rate of 36, 00, 000 litres per hour. If the length of the pipe is 1506 m and f = 0.01, ignoring other minor losses and assuming the economical diameter from Lea's formula D = 1.2 Q, the water horse power of the pump is
Options
A. 400
B. 450
C. 500
D. 580
E. 600

9. If P is population of a city in thousands and Q is fire demand in litres per minute, for proper estimate of water, the Empirical formula is suggested by
Options
A. National Board of fire under-writers
B. Freeman
C. Kuichling
D. None of these.

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