☰ Water Supply (Civil Engineering) - MCQs

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Q13.

If diameters of the main pipe is taken less then economic diameters, then :

  • A. head loss will be high
  • B. cost of pipe will be less
  • C. both (a) and (b)
  • D. none of these

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Q14.

Water is to be lifted from a ground reservoir of 4 m depth to an elevated reservoir. If difference in their water level is 40 m. In order to fill this elevated reservoir of 90 cu.m capacity in one hour, then appropriate H.P. of the centrifugal pump chosen will be :

  • A. 10 H.P.
  • B. 25 H.P.
  • C. 50 H.P.
  • D. 100 H.P.

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Q15.

During a recuperation test, water level in an open well was depressed by pumping by 2.5 metres and is recuperated by an amount of 1.6 m in 70 minutes. Then, yield from a well of 3 m diameters under a depression head of 3.5 metre :

  • A. 5 lit/sec
  • B. 3 lit/sec
  • C. 6.02 lit/sec
  • D. 7.03 lit/sec

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Q16.

The economical diameters of a pipe, through which a discharge of 0.3 cumecs is to be passed is :

  • A. 1.2m
  • B. 0.8m
  • C. 0.6m
  • D. 0.4m

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Q17.

The purpose of providing a balancing reservoir in a water supply distribution system :

  • A. equalise pressure in the distribution system
  • B. store adequate quantity of water to meet requirement in case of breakdown of inflow
  • C. store adequate fire- fighting reserve
  • D. take care of fluctuations in the rate of consumption

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Q18.

The end product produced after separation and anaerobic bacterial digestion of organic municipal solid wastes is called :

  • A. compost
  • B. humus
  • C. leachate
  • D. ashes

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