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  • Question

  • For a flow of 5.7 MLD (million litres per day) and a detention time of 2 hours, the surface area of a rectangular sedimentation tank to remove all particles having settling velocity of 0.33 mm/s is


  • Options
  • A. 20 m2
  • B. 100 m2
  • C. 200 m2
  • D. 400 m2

  • Correct Answer
  • 200 m2 

    • GATE Exam Questions problems

    Search Results

    • 1. 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
    • 2. 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
    • 3. 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
    • 4. 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
    • 5. 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
    • 6. A soil sample has a void ratio of 0.5 and its porosity will be close to

    • Options
    • A. 50%
    • B. 66%
    • C. 100%
    • D. 33%
      • Discuss
    • 7. Coulomb's theory of earth pressure is based on :

    • Options
    • A. the theory of elasticity
    • B. the theory of plasticity
    • C. empirical rules
    • D. wedge theory
      • Discuss
    • 8. An isolated T beam is used as a walkway. The beam is simply supported with an effective span of 6 m. The effective width of flange, for the cross-section shown in the below figure is

    • Options
    • A. 900 mm
    • B. 1000 mm
    • C. 1259 mm
    • D. 2200 mm
      • Discuss
    • 9. Which one of the following statements is true with regard to the flexibility method of analysis?

    • Options
    • A. The method is used to analyse determinate structures
    • B. The method is used only for manual analysis of indeterminate structures
    • C. The method is used for analysis of flexible structures
    • D. The method is used for analysis of indeterminate structures with lesser degree of static indeterminacy.
      • Discuss
    • 10. A circular sewer 2 m diameter has to carry a discharge of 2 m3/s when flowing nearly full. What is the minmum required slope to initiate the flow? (Assume Manning's n = 0.015)

    • Options
    • A. 0.00023
    • B. 0.000036
    • C. 0.000091
    • D. 0.000014
      • Discuss

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