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  • Question
  • The diameter of the Vicat plunger is 10 mm and its length varies from


  • Options
  • A. 20 mm to 30 mm
  • B. 30 mm to 40 mm
  • C. 40 mm to 50 mm
  • D. 50 mm to 60 mm
  • E. none of these.

  • Correct Answer
  • 40 mm to 50 mm 


  • Concrete Technology problems


    Search Results


    • 1. The shrinkage of concrete

    • Options
    • A. is proportional to water content is the mix
    • B. is proportional to cement concrete
    • C. increases with age of concrete
    • D. all the above.
    • Discuss
    • 2. Efflorescence in cement is caused due to an excess of

    • Options
    • A. alumina
    • B. iron oxide
    • C. silica
    • D. alkalis
    • E. magnesium oxide.
    • Discuss
    • 3. The most useless aggregate is one whose surface texture is

    • Options
    • A. smooth
    • B. granular
    • C. glassy
    • D. honey combed and porous.
    • Discuss
    • 4. Pick up the correct statement from the following:

    • Options
    • A. Sand stones may be divided into calcareous, siliceous and ferrugineous sand stones
    • B. Concrete using sand stones, cracks due to excessive shrinkage
    • C. Very hard and close grained crystallined lime stones are suitable aggregates but provide low strength
    • D. Broken bricks produce a concrete having good fire resisting qualities
    • E. All the above.
    • Discuss
    • 5. Pozzolana cement is used with confidence for construction of

    • Options
    • A. dams
    • B. massive foundations
    • C. abutments
    • D. R.C.C. structures
    • E. all the above.
    • Discuss
    • 6. Allowable shear strength of concrete, depends upon

    • Options
    • A. shear strength
    • B. tensile strength
    • C. compressive strength
    • D. none of these.
    • Discuss
    • 7. While designing an air entrained concrete

    • Options
    • A. water cement ratio is reduced
    • B. proportion of aggregates is reduced
    • C. an allowance for the entrained air is made
    • D. strength of the concrete, is reduced
    • E. all the above.
    • Discuss
    • 8. Concrete containing

    • Options
    • A. silicious aggregates, has higher co-efficient of expansion
    • B. igneous aggregates, has intermediate coefficient of expansion
    • C. lime stones, has lowest co-efficient of expansion
    • D. All the above.
    • Discuss
    • 9. According to Water-Cement Ratio Law, the strength of workable plastic concrete

    • Options
    • A. depends upon the amount of water used in the mix
    • B. does not depend upon the quality of cement mixed with aggregates
    • C. does not depend upon the quanity of cement mixed with aggregates
    • D. all the above.
    • Discuss
    • 10. The factor which affects workability, is

    • Options
    • A. water content and its temperature
    • B. shape and size of the aggregates
    • C. grading and surface textures of the aggregates
    • D. air entraining agents
    • E. all the above.
    • Discuss


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