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  1. 6 mm and 75 μ   
  2. 4·75 mm and 75 μ
  3. 75 μ and 4·75 mm 
  4. 10 mm and 4·75 mm
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1 Answers

Option 2 : 4·75 mm and 75 μ

Concept

Aggregates are one of the most important materials used in construction.

If aggregate remain on 4.75 mm sieve then they are called coarse aggregates.

i.e. Coarse aggregate > 4,75 mm

If aggregates pass through 4.745 mm grade and retain on 75-micron sieve then they are called fine aggregates.

i.e. Fine aggregate < 4.75 mm   

Note: For RCC work, the maximum size of aggregate is limited to 20 - 25 mm

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