railway DFCCIL Executive 2025 Mock Test Soil Mechanics and Foundation Engineering Classification of Soils
If 90% of soil particles got retained over 2 mm sieve and 50% of soil particles got retained over 4.75 mm sieve, then the effective diameter of the soil will be:
1
4.75 mm
2
6.75 mm
3
2 mm
4
1.25 mm