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  • Question
  • If the engineer-in-charge approves, the 10 cm cubes may be used for the work test of concrete provided maximum nominal size of aggregate, does not exceed


  • Options
  • A. 10 cm
  • B. 15 cm
  • C. 20 cm
  • D. 25 cm
  • E. 30 cm

  • Correct Answer
  • 20 cm 


  • Concrete Technology problems


    Search Results


    • 1. The commercial name of white and coloured cement in India, is

    • Options
    • A. colocrete
    • B. rainbow cement
    • C. silvicrete
    • D. snowcem
    • E. all the above.
    • Discuss
    • 2. The aggregate containing moisture in pores and having its suface dry, is known as

    • Options
    • A. moist aggregates
    • B. very dry aggregates
    • C. dry aggregates
    • D. saturated surface dry aggregate
    • E. none of these.
    • Discuss
    • 3. Pick up the correct statement from the following:

    • Options
    • A. Water enables chemical reaction to take place with cement
    • B. Water lubricates the mixture of gravel, sand and cement
    • C. Only a small quantity of water is required for hydration of cement
    • D. Strength of concrete structure largely depends upon its workability
    • E. All the above.
    • Discuss
    • 4. The operation of removing humps and hollows of uniform concrete surface, is known as

    • Options
    • A. floating
    • B. screeding
    • C. trowelling
    • D. finishing
    • E. none of these.
    • Discuss
    • 5. Saw dust can be rendered chemically inert by boiling it in water containing

    • Options
    • A. ferrous sulphate
    • B. potassium chloride
    • C. ammonia
    • D. nitric acid
    • E. sulphuric acid.
    • Discuss
    • 6. Pick up the correct statement from the following:

    • Options
    • A. High percentage of C3S and low percentage of C2S cause rapid hardening
    • B. High percentage of C3S and low percentage of C2S make the cement less resistive to chemical attack
    • C. Low percentage of C3S and high percentage of C2S contribute to slow hardening
    • D. Low percentage of C3S and high percentage of C2S provide greater resistance to chemical attack
    • E. All the above.
    • Discuss
    • 7. Pick up the correct statement from the following:

    • Options
    • A. Calcium chloride acts as a retarder
    • B. Gypsum (calcium sulphate) acts as an accelerator
    • C. Gypsum (calcium sulphate) acts as a retarder
    • D. Calcium chloride acts as an accelerator
    • E. Both (c) and (d).
    • Discuss
    • 8. For the construction of R.C.C. slabs, columns, beams, walls, etc. the grade of concrete mix used, is

    • Options
    • A. 1 : 3 : 6
    • B. 1 : : 3
    • C. 1 : 2 : 4
    • D. 1 : 1 : 2
    • E. 1 : 4 : 8.
    • Discuss
    • 9. Slump test of concrete is a measure ofits

    • Options
    • A. consistency
    • B. compressive strength
    • C. tensile strength
    • D. impact value.
    • Discuss
    • 10. The void ratio of

    • Options
    • A. single size coarse aggregate is roughly 0.45.
    • B. graded coarse aggregate is roughly 0.040
    • C. fine aggregate is roughly 0.45
    • D. all the above.
    • Discuss


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