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  • Question
  • The lower water cement ratio in concrete, introduces


  • Options
  • A. smaller creep and shrinkage
  • B. greater density and smaller permeability
  • C. improved frost resistance
  • D. greater wear resistance and improved bond strength
  • E. all the above.

  • Correct Answer
  • all the above. 


  • Concrete Technology problems


    Search Results


    • 1. Sands of zone I are

    • Options
    • A. coarse
    • B. medium
    • C. medium to fine
    • D. fine.
    • Discuss
    • 2. Le-Chatelier's apparatus is used for testing

    • Options
    • A. soundness of cement
    • B. hardness of cement
    • C. strength of cement
    • D. durability of cement.
    • Discuss
    • 3. If a grading curve is horizontal bet-wen the portions of 20 mm I.S. Sieve and 4.75 mm I.S. Sieve, the graded aggregates do not contain

    • Options
    • A. 20 mm particles
    • B. 10 mm particles
    • C. 4.75 mm particles
    • D. all the above.
    • Discuss
    • 4. Pick up the correct statement from the following:

    • Options
    • A. The bulk density of fine aggregate is usually about 10 per cent more than that of coarse aggregate of similar composition
    • B. The specific gravity of aggregate is important for the determination of the moisture content
    • C. The absorption and porosity of an aggregate influence the property of the concrete
    • D. A highly absorptive aggregate reduces the workability of concrete considerably
    • E. All the above.
    • Discuss
    • 5. The aggregate impact value of the aggregate used in

    • Options
    • A. building concrete is less than 45
    • B. road pavement concrete is less than 30
    • C. runway concrete is less than 30
    • D. all the above.
    • Discuss
    • 6. The impurity of mixing water which affects the setting time and strength of concrete, is

    • Options
    • A. sodium sulphates
    • B. sodium chlorides
    • C. sodium carbonates and bicarbonates
    • D. calcium chorides
    • E. calcium bicarbonates
    • Discuss
    • 7. On a grading curve, the gap grading is represented by

    • Options
    • A. a horizontal line
    • B. a vertical line
    • C. N.W. inclined line
    • D. N.E. inclined line
    • E. none of these.
    • Discuss
    • 8. The cement becomes useless if its absorbed moisture content exceeds

    • Options
    • A. 1%
    • B. 2%
    • C. 3%
    • D. 4%
    • E. 5%
    • Discuss
    • 9. Pick up the incorrect statement from the following:

    • Options
    • A. With passage of time, the strength of cement increases
    • B. With passage of time, the strength of cement decreases
    • C. After a period of 24 months, the strength of cement reduces to 50%
    • D. The concrete made with storage deteriorated cement, gains strength with time
    • E. None of these.
    • Discuss
    • 10. Pick up the correct statement from the following:

    • Options
    • A. The maximum size of a coarse aggregate, is 75 mm and minimum 4.75 mm
    • B. The maximum size of the fine aggregate, is 4.75 mm and minimum 0.075 mm
    • C. The material having particles of size varying from 0.06 mm to 0.002 mm, is known as silt
    • D. The material having particles of size less than 0.002 mm, is known as clay
    • E. All the above.
    • Discuss


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