logo

CuriousTab

CuriousTab

Discussion


Home Civil Engineering Concrete Technology Comments

  • Question
  • Addition of pozzolana to ordinary port land cement, causes


  • Options
  • A. decrease in early strength
  • B. reduction in chemical action with sulphates
  • C. increase in shrinkage
  • D. reduction bleeding
  • E. all the above.

  • Correct Answer
  • all the above. 


  • Concrete Technology problems


    Search Results


    • 1. Water required per bag of cement, is

    • Options
    • A. 7 kg
    • B. 14 kg
    • C. 21 kg
    • D. 28 kg
    • E. 35 kg
    • Discuss
    • 2. If the depth of moist sand in a cylinder is 15 cm and the depth of the sand when fully inundated with water is 12 cm, the bulking of the moist sand, is

    • Options
    • A. 10%
    • B. 12%
    • C. 15%
    • D. 20%
    • E. 25%.
    • Discuss
    • 3. Proper batching ensures

    • Options
    • A. economy
    • B. durability
    • C. workability
    • D. strength
    • E. all the above.
    • Discuss
    • 4. C.R.R.I. charts are used to obtain a relatioship between strength of concrete and

    • Options
    • A. water cement ratio
    • B. workability
    • C. grading of aggregate
    • D. fineness modulus
    • E. none of these.
    • Discuss
    • 5. Pick up the incorrect statement from the following:

    • Options
    • A. The bottom and top ends of slump mould are parallel to each other
    • B. The axis of the mould is perpendicular to the end faces
    • C. The internal surface of the mould is kept clean and free from set cement
    • D. The mould is in the form of a frustum of hexagonal pyramid
    • E. None of these.
    • Discuss
    • 6. For batching 1:3:6 concrete mix by volume, the ingredients required per bag of 50 kg cement, are:

    • Options
    • A. 70 litres of sand and 120 litres of aggregates
    • B. 70 kg of sand and 140 litres of aggregates
    • C. 105 litres of sand and 140 litres of aggregates
    • D. 105 litres of sand and 210 litres of aggregates
    • E. none of these.
    • Discuss
    • 7. ISI has specified full strength of concrete after

    • Options
    • A. 7 days
    • B. 14 days
    • C. 21 days
    • D. 28 days
    • E. none of these.
    • Discuss
    • 8. Pick up the correct statement from the following:

    • Options
    • A. Construction joints are necessarily planned for their locations
    • B. Expansion joints are provided to accommodate thermal expansion
    • C. Construction joints are provided to control shrinkage cracks
    • D. Expansion joints need not be provided in foundation concrete
    • E. All the above.
    • Discuss
    • 9. A construction joint is provided where

    • Options
    • A. bending moment is small
    • B. shear force is small
    • C. the member is supported by other member
    • D. all the above.
    • Discuss
    • 10. Hardening of cement occurs at

    • Options
    • A. rapid rate during the first few days and afterwards it continues to increase at a decreased rate
    • B. slow rate during the first few days and afterwards it continues to increase at a rapid rate
    • C. uniform rate throughout its age
    • D. none of these.
    • Discuss


    Comments

    There are no comments.

Enter a new Comment