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  • Question

  • Pick up the incorrect statement from the following regarding fire hydrants


  • Options
  • A. Fire hydrants are fitted in water mains at 100 m to 150 m apart at fire
  • B. The minimum water pressure hydrants, is kept 1.5 kg/cm2
  • C. The water at pressure 1 to 1.5 kg/cm2 is made available for 4 to 5 hours for constant use
  • D. None of these.

  • Correct Answer
  • None of these. 

    • Water Supply Engineering problems

    Search Results

    • 1. According to Kuichling's formula, fire demand in litres per minute for a population of P thousands, is

    • Options
    • A. 3182 P
    • B.
    • C. 4637 P [1 - 0.01 P]
    • D. 5663 P.
      • Discuss
    • 2. The maximum permissible nitrites in public water supplies, is

    • Options
    • A. Nil
    • B. 0.5 P.P.M.
    • C. 1.0. P.P.M.
    • D. 1.5 P.P.M.
    • E. 200 P.P.M.
      • Discuss
    • 3. Aeration of water is done to remove

    • Options
    • A. odour
    • B. colour
    • C. bacterias
    • D. hardness
    • E. turbidity.
      • Discuss
    • 4. A high velocity of wash water is required for

    • Options
    • A. rapid gravity filter with strainers
    • B. rapid gravity filter without strainers
    • C. slow sand filter with strainers
    • D. slow sand filter without strainers
    • E. none of these.
      • Discuss
    • 5. According to IS : 1172-1963, a minimum of 135 litres of water capita per day, is required for

    • Options
    • A. Boarding schools
    • B. Nurses home and medical quarters
    • C. hostels
    • D. all the above.
      • Discuss
    • 6. Economic height of a dam is the height corresponding to which

    • Options
    • A. cost of the dam per unit of storage is minimum
    • B. amount of silting is less
    • C. cost of dam per unit storage is maximum
    • D. free board provided is least
    • E. none of these.
      • Discuss
    • 7. Pick up the correct statement from the following :

    • Options
    • A. Detention period for plain sedimentation tanks ranges between 4 to 8 hours
    • B. Detention period for sedimentation tanks, using coagulants usually ranges between 2 to 4 hours
    • C. The horizontally flow velocity in sedimentation tanks, is generally limited to 0.3 m/minute
    • D. All the above.
      • Discuss
    • 8. Sunlight

    • Options
    • A. helps growth of bacterias
    • B. impedes growth of algae
    • C. increases dissolved oxygen content
    • D. reduces turbidity.
      • Discuss
    • 9. Time of concentration

    • Options
    • A. is the time taken, for precipitation
    • B. duration of rainfall.
    • C. time taken for all the ran off to reach the drain
    • D. time taken for the storm water to travel from the most remote point to the drain.
      • Discuss
    • 10. P0, P1, P2 be the populations of a city at times t0, t1 and t2 = 2t1, the saturation value of the population Ps of the city, is

    • Options
    • A.
    • B.
    • C.
    • D.
    • E. None of these.
      • Discuss

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