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  • Question

  • Water cement ratio is


  • Options
  • A. volume of water to that of cement
  • B. weight of water to that of cement
  • C. weight of concrete to that of water
  • D. volume of concrete to that of water
  • E. both (a) and (b) of the above.

  • Correct Answer
  • both (a) and (b) of the above. 

    • Concrete Technology problems

    Search Results

    • 1. Workability of concrete mix with low water cement ratio is determined by

    • Options
    • A. tensile strength test
    • B. slump test
    • C. compaction factor test
    • D. flexural strength test
    • E. none of these.
      • Discuss
    • 2. An ordinary Portland cement when tested for its fineness, should not leave any residue on I.S. seive No. 9, more than

    • Options
    • A. 5%
    • B. 10%
    • C. 15%
    • D. 20%
    • E. 25%
      • Discuss
    • 3. Separation of water or water sand cement from a freshly concrete, is known

    • Options
    • A. bleeding
    • B. creeping
    • C. segregation
    • D. flooding
    • E. none of these.
      • Discuss
    • 4. To obtain a very high strength concrete, use very fine grained

    • Options
    • A. Granite
    • B. Magnetite
    • C. Barite
    • D. Volcanic scoria.
      • Discuss
    • 5. Pick up the incorrect statemnt from the following. For performing compressive strength test of cement

    • Options
    • A. cement and standard sand mortar are used in the ratio of 1 : 3
    • B. water is added at the rate of + 3.0 percentage of water where P is the percentage of water for standard consistency
    • C. A cube mould of 10 cm x 10 cm x 10 cm is used
    • D. The perpared moulds are kept in a atmosphere of 50% relative humidity
    • E. The temperature of water in the submerged tank for curing moulds, should be 27° ± 2°C.
      • Discuss
    • 6. For the construction of cement con-certe dams, the maximum permissible size of the aggregates, is

    • Options
    • A. 40 mm
    • B. 50 mm
    • C. 60 mm
    • D. 70 mm
    • E. 80 mm
      • Discuss
    • 7. Permissible compressive strength of M 150 concrete grade is

    • Options
    • A. 100 kg/cm2
    • B. 150 kg/cm2
    • C. 200 kg/cm2
    • D. 250 kg/cm2
    • E. 300 kg/cm2
      • Discuss
    • 8. Pick up the correct statement from the following:

    • Options
    • A. An increase in water content must be accompanied by an increase in cement content
    • B. Angular and rough aggregates reduce the workability of the concrete
    • C. Large size aggregates increase the workability due to lesser surface area
    • D. The slump of the concrete mix decreases due to an increase in temperature
    • E. All the above.
      • Discuss
    • 9. The top diameter, bottom diameter and the height of a slump mould are :

    • Options
    • A. 10 cm, 20 cm, 30 cm
    • B. 10 cm, 30 cm, 20 cm
    • C. 20 cm, 10 cm, 30 cm
    • D. 20 cm, 30 cm, 10 cm
    • E. 30 cm, 20 cm, 10 cm
      • Discuss
    • 10. For concreting tunnel linings, tran-portation of concrete is done by

    • Options
    • A. pans
    • B. wheel borrows
    • C. containers
    • D. pumps
    • E. belt conveyors.
      • Discuss

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