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MCQs

Total Questions : 824 | Page 4 of 83 pages
Question 31. If the chosen diameter of a pipe, is less than the economical diameter
  1.    Cost of pipe will be less
  2.    Head loss will be high
  3.    Cost of pumping will be more than saving
  4.    All the above
 Discuss Question
Answer: Option D. -> All the above
Question 32. Turbidity of raw water is a measure of
  1.    Suspended solids
  2.    Acidity of water
  3.    B.O.D
  4.    None of these
 Discuss Question
Answer: Option A. -> Suspended solids
Question 33. The expected discharge to be obtained from an open well sunk in coarse sand is 0.0059 cumec. If the working depression head of the well is 3 m, the minimum diameter of the well, is
  1.    2 m
  2.    2.25 m
  3.    2.50 m
  4.    3.00 m
 Discuss Question
Answer: Option D. -> 3.00 m
Question 34. In distribution pipes, drain valves are provided at
  1.    lower point
  2.    higher point
  3.    junction points
  4.    any where
 Discuss Question
Answer: Option A. -> lower point
Question 35. Asbestos pipes are
  1.    light in weight and easy to transport
  2.    highly resistant to corrosion
  3.    very much smooth and hydraulically efficient
  4.    all the above
 Discuss Question
Answer: Option D. -> all the above
Question 36. As per IS : 1172-1963, water required per head per day for average domestic purposes, is
  1.    65 litres
  2.    85 litres
  3.    105 litres
  4.    135 litres
 Discuss Question
Answer: Option D. -> 135 litres
Question 37. Pick up the correct statement from the following:
  1.    The water level in a still well, represents the ground water table level
  2.    The difference between water table level and the water level in a well after pumping, is called depression head
  3.    The surface of water table surrounding a well during pumping, forms a cone of depression
  4.    All the above
 Discuss Question
Answer: Option D. -> All the above
Question 38. In pressure supply mains, water hammer pressure is reduced by providing
  1.    Sluice valves
  2.    Air valves
  3.    Pressure relief valves
  4.    None of these
 Discuss Question
Answer: Option C. -> Pressure relief valves
Question 39. Sunlight
  1.    helps growth of bacterias
  2.    impedes growth of algae
  3.    increases dissolved oxygen content
  4.    reduces turbidity
 Discuss Question
Answer: Option B. -> impedes growth of algae
Question 40. In centrifugal pump installation,
  1.    Pump is properly primed before starting
  2.    The diameter of the pipe at inlet as well as at outlet, is kept smaller than the delivery pipe
  3.    The motor may burn out if it is started with empty delivery pipe and with open gate valve
  4.    All the above
 Discuss Question
Answer: Option D. -> All the above

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