Civil Engineering MCQJE Level Civil Engineering
As per IS 1498, fine-grained soils are defined as soils in which more than 50% of particles pass through:
Soil MechanicsSoil MechanicsEASY
Choose the correct answer
A
4.75 mm sieve
B
75 μm (0.075 mm) sieve
C
2 mm sieve
D
425 μm sieve
Correct Answer
B. 75 μm (0.075 mm) sieve
Why is this the answer?
IS 1498: Fine-grained soil: >50% by mass passes 75 μm (0.075 mm) sieve. These are silt and clay. Coarse grained: >50% retained on 75 μm sieve (sand and gravel). Fine-grained soils further classified by Atterberg limits (A-line, U-line on plasticity chart).
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