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  • Question
  • 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

  • Correct Answer
  • effective pressure becomes zero 


  • GATE Exam Questions problems


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    • 1. Coagulation-flocculation with alum is performed :

    • Options
    • A. immediately before chlorination
    • B. immediately after chlorination
    • C. after rapid sand filtration
    • D. before rapid sand filtration
    • Discuss
    • 2. The flow of water (mass density = 1000 kg/m3 and kinematic viscosity = 10-6 m2/s) in a commercial pipe, having equivalent roughness ks as 0.12 mm, yields an average shear stress at the pipe boundary = 600 N/m2. The value of ks/?' (?' being the thickness of laminar sub-layer) for this pipe is

    • Options
    • A. 0.25
    • B. 0.50
    • C. 6.0
    • D. 8.0
    • Discuss
    • 3. Horizontal stiffness coefficient, K11 of bar ab is given by :

    • Options
    • A. A E/l 2
    • B. A E/2 1
    • C. A E/l
    • D. 2 A E/l
    • Discuss
    • 4. A soil formation through which only seepage is possible, being partly permeable and capable of giving insignificant yield, is classified as

    • Options
    • A. Aquifer
    • B. Aquitard
    • C. Aquifuge
    • D. Aquiclude
    • Discuss
    • 5. The function of ballast in railaway tracks is to

    • Options
    • A. facilitate drainage
    • B. serve as an elastic support for the track structure
    • C. provide the necessary resilience against the dynamic effect of the loads
    • D. all the above
    • Discuss
    • 6. 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
    • 7. 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
    • 8. 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
    • 9. 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
    • 10. 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
    • Discuss


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