The process of mixing, transporting, placing and compacting concrete using Ordinary Port land Cement should not take more than

A. 30 minutes

B. 40 minutes

C. 60 minutes

D. 90 minutes

Please do not use chat terms. Example: avoid using "grt" instead of "great".

You can do it
  1. Particles of 0.002 mm size are that of
  2. Pick up the correct statement from the following:
  3. Minimum pitch of transverse reinforcement in a column is
  4. In a counterfort retaining wall, the main reinforcement in the stem at mid span is provided on
  5. An aggregate is known as cyclopean aggregate if its size is more than
  6. Pick up the correct statement from the following:
  7. The slab is designed as one way if the ratio of long span to short span is
  8. Curing
  9. Permissible compressive strength of M 150 concrete grade is
  10. Water cement ratio is generally expressed in volume of water required per
  11. Pick up the correct statement from the following:
  12. Proper batching ensures
  13. Pick up the correct statement from the following:
  14. If the average compressive strength is 4000 kg/cm2 and standard deviation is 500, the co-efficient of…
  15. Workability of concrete is directly proportional to
  16. The limits of percentage p of the longitudinal reinforcement in a column is given by
  17. 1% of voids in a concrete mix would reduce its strength by about
  18. For a simply supported beam of span 15 m, the minimum effective depth to satisfy the vertical deflection…
  19. In the method of voids for determination of the quantity of cement paste, it is assumed that
  20. An aggregate which passes through 25 mm I.S. sieve and is retained on 20 mm sieve, is said to be flaky…
  21. If P, Y and Z are the weights of cement, fine aggregates and coarse aggregates respectively and W/C…
  22. For given workability the grading requiring the least amount of water is one that gives
  23. The process of hardening the concrete by keeping its surface moist is known
  24. Pozzolana cement is used with confidence for construction of
  25. Tricalcium aluminate (C3A)
  26. The bulk density of aggregates, is generally expressed as
  27. If the depth of moist sand in a cylinder is 15 cm and the depth of the sand when fully inundated with…
  28. Ordinary Portland cement is manufactured from
  29. High temperature
  30. Strength of concrete increases with