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Q: Sand requiring a high water cement ratio, belongs to
  • A. Zone I
  • B. Zone II
  • C. Zone III
  • D. Zone IV
Correct Answer: Option D - Zone 1 is coarser & Zone IV is finer sand. It can be analysed by the sizes of particle. Smaller the size, the surface area would be higher. So Zone IV requires more water.
D. Zone 1 is coarser & Zone IV is finer sand. It can be analysed by the sizes of particle. Smaller the size, the surface area would be higher. So Zone IV requires more water.

Explanations:

Zone 1 is coarser & Zone IV is finer sand. It can be analysed by the sizes of particle. Smaller the size, the surface area would be higher. So Zone IV requires more water.