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  • Question

  • Breakpoint chlorination of water involves addition of chlorine in an amount sufficient to:


  • Options
  • A. react with any ammonia and readily oxidisable organic matter
  • B. kill Giardia cysts
  • C. react with inorganic matter
  • D. reduce bacterial growth in filters

  • Correct Answer
  • react with any ammonia and readily oxidisable organic matter 

    • GATE Exam Questions problems

    Search Results

    • 1. In which one of the following arrangements would the vertical force on the cylinder due to water be the maximum?

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 2. For a fixed beam with span L, having plastic moment capacity of Mp, the ultimate central concentrated load will be

    • Options
    • A. 4 Mp/L
    • B. Mp/8L
    • C. 6 Mp/L
    • D. 8 Mp/L
      • Discuss
    • 3. The span (s) to be loaded uniformly for maximum positive (upward) reaction at support P, as shown in the figure below, is (are)

    • Options
    • A. PQ only
    • B. PQ and QR
    • C. QR and RS
    • D. PQ and RS
      • Discuss
    • 4. A reinforced concrete structure has to be constructed along a sea coast. The minimum grade of concrete to be used as per IS : 456-2000

    • Options
    • A. M 15
    • B. M 20
    • C. M 25
    • D. M 30
      • Discuss
    • 5. Pipingin soil occurs when

    • Options
    • A. the soil is highly porous
    • B. sudden change in permeability occurs
    • C. effective pressure becomes zero
    • D. the soil is highly stratified
      • Discuss
    • 6. A saturated clay stratum draining both at the top and bottom undergoes 50 percent consolidation in 16 years under an applied load. If an additional drainage layer were present at the middle of the clay stratum, 50 percent consolidation would occur in

    • Options
    • A. 2 years
    • B. 4 years
    • C. 8 years
    • D. 16 years
      • Discuss
    • 7. Water table drops by 3 m in an irrigable land of 50 hectare. If porosity and specific retention are 0.30 and 0.10 respectively, the change in storage in hectare-meter is :

    • Options
    • A. 15
    • B. 30
    • C. 45
    • D. 60
      • Discuss
    • 8. Chlorine is some times used in sewage treatment

    • Options
    • A. to avoid flocculation
    • B. to increase biological activity of bacteria
    • C. to avoid bulking of activated sludge
    • D. to help in grease separation
      • Discuss
    • 9. If the porosity of a soil sample is 20%, the void ratio is

    • Options
    • A. 0.20
    • B. 0.80
    • C. 1.00
    • D. 0.25
      • Discuss
    • 10. The stress-strain diagram for two materials A and B is shown below.

      The following statements are made based on this diagram :

      1. Mateiral A is more brittle than material B.
      2. The ultimate strength of material B is more than that of A.

      With reference to the above statements, which of the following applies?

    • Options
    • A. Both the statements are false.
    • B. Both the statements are true.
    • C. I is true but II is false.
    • D. I is false but II is true.
      • Discuss

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