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  • Question
  • Pick up the incorrect statement from the following:


  • Options
  • A. A rich mix of concrete possesses higher strength than that a lean mix of desired workability with excessive equantity of water
  • B. The strength of concrete decreases as the water cement ratio increases
  • C. If the water cement ratio is less than 0.45, the concrete is not workable and causes honey-combed structure
  • D. Good compaction by mechanical vibrtions, increases the strength of concrete
  • E. None of these.

  • Correct Answer
  • A rich mix of concrete possesses higher strength than that a lean mix of desired workability with excessive equantity of water 


  • Concrete Technology problems


    Search Results


    • 1. Separation of coarse aggregates from mortar during transportation, is known

    • Options
    • A. bleeding
    • B. creeping
    • C. segregation
    • D. shrinkage
    • E. none of these.
    • Discuss
    • 2. Percentage of pozzolanic material containing clay upto 80% used for the manufacture of pozzolana cement, is

    • Options
    • A. 30%
    • B. 40%
    • C. 50%
    • D. 60%
    • E. 70%
    • Discuss
    • 3. Pick up the correct statement from the following:

    • Options
    • A. Lime in excess, causes the cement to expand and disintegrate
    • B. Silica in excess, causes the cement to set slowly
    • C. Alumina in excess, reduces the strength of the cement
    • D. Magnesium oxide in excess, remains in free state and makes the cement unsound
    • E. All the above.
    • Discuss
    • 4. Too wet concrete may cause

    • Options
    • A. weakness of concrete
    • B. excessive laitance
    • C. segregation
    • D. lower density
    • E. all the above.
    • Discuss
    • 5. Pick up the correct statement from the following:

    • Options
    • A. Water cement paste hardens due to hydration
    • B. During hardening cement binds the aggregates together
    • C. Cement provides strength, durability and water tightness to the concrete
    • D. All the above.
    • Discuss
    • 6. The process of hardening the concrete by keeping its surface moist is known

    • Options
    • A. placing
    • B. wetting
    • C. curing
    • D. compacting
    • E. none of these.
    • Discuss
    • 7. The internal dimensions of a ware house are 15 m x 5.6 m, and the maximum height of piles is 2.70 m, the maximum number of bags to be stored in two piles, are

    • Options
    • A. 1500 bags
    • B. 2000 bags
    • C. 2500 bags
    • D. 3000 bags
    • E. 4000 bags
    • Discuss
    • 8. Pick up the incorrect statement from the following:

    • Options
    • A. The degree of grinding of cement, is called fineness
    • B. The process of changing cement paste into hard mass, is known as setting of cement
    • C. The phenomenon by virtue of which cement does not allow transmission of sound, is known as soundness of cement
    • D. The heat generated during chemical reaction of cement with water, is known as heat of hydration
    • E. None of these.
    • Discuss
    • 9. The light weight aggregates are obtained from

    • Options
    • A. sedimentary rocks
    • B. metamorphic rocks
    • C. igneous rocks
    • D. volcanic source.
    • Discuss
    • 10. The ratio of various ingredients (cement, sand, aggregates) in concrete of grade M 200, is

    • Options
    • A. 1 : 2 : 4
    • B. 1 : 3 : 6
    • C. 1 : : 3
    • D. 1 : 1 : 2
    • E. 4 : 2 : 1
    • Discuss


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