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  • Question

  • During percussion drilling


  • Options
  • A. ground water observations are hindered due to entry of the slurry in the soil below the bottom of the hole
  • B. caving or mixing of strata are caused in soft soils or cohesionless soils
  • C. the soil to a considerable depth below the bottom of the hole gets disturbed
  • D. all the above.

  • Correct Answer
  • all the above. 

    • Building Construction problems

    Search Results

    • 1. Pick up the incorrect statement from the following :

    • Options
    • A. Cement is added to lime mortar to increase its hydraulic properties only
    • B. Lime surkhi mortar is used for pointing the walls
    • C. Lime should be slaked before preparing lime mortar
    • D. High early strength concrete is generally used in cold weather.
      • Discuss
    • 2. The form work from the underside of slabs, can be removed only after

    • Options
    • A. 1 day
    • B. 4 days
    • C. 7 days
    • D. 14 days.
      • Discuss
    • 3. The raft slab is projected beyond the outer walls of the structure by

    • Options
    • A. 5 to 10 cm
    • B. 15 to 20 cm
    • C. 25 to 30 cm
    • D. 30 to 45 cm
    • E. 60 cm.
      • Discuss
    • 4. To ensure that supporting area of an offset footing of a boundary wall is fully compressive, the C.G. of load must act

    • Options
    • A. at the centre of the base
    • B. within the middle third of the base
    • C. within the middle fifth of the base
    • D. neither (a), (b) nor (c).
      • Discuss
    • 5. A projecting piece usually provided to support a truss, is

    • Options
    • A. cornice
    • B. coping
    • C. frieze
    • D. lintal.
      • Discuss
    • 6. If (?) is the angle of repose of soil of weight w kg/m3, the horizontal pressure p at a depth of h metres per metre length of wall, is

    • Options
    • A.
    • B.
    • C.
    • D.
      • Discuss
    • 7. The single stage well point system of dewatering an excavation can be used if the depth of excavation does not exceed

    • Options
    • A. 5 m
    • B. 10 m
    • C. 15 m
    • D. 20 m
    • E. 25 m.
      • Discuss
    • 8. For providing a raft foundation, the following activities are involved

      1. ramming the foundation bed
      2. excavation of the soil upto required depth
      3. laying the reinforcement over the foundation bed
      4. curing the cement concrete placed over reinforcement
      5. pouring the cement concrete over the reinforcement.

      The correct sequence is

    • Options
    • A. 1, 2, 3, 4, 5
    • B. 5, 4, 3, 2, 1
    • C. 2, 1, 3, 5, 4
    • D. 3, 2, 5, 1, 4.
      • Discuss
    • 9. Hydration of cement is due to chemical action of water with

    • Options
    • A. Tricalcium silicate and dicalcium silicate
    • B. Dicalcium silicate and tricalcium aluminate
    • C. Tricalcium aluminate and tricalcium alumino ferrite
    • D. All the above.
      • Discuss
    • 10. Wp and Wf are the weights of a cylinder containing partially compacted and fully compacted concrete. If the compaction factor is 0.95, the workability of concrete is

    • Options
    • A. extremely low
    • B. very low
    • C. low
    • D. high
    • E. none of these.
      • Discuss

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