The tests needed for soil classification as per USCS is/are
- AOnly Sieve analysis
- BOnly Atterberg limits
- CSieve analysis and Atterberg limitsCorrect
- DSieve analysis, Hydrometer analysis and Atterberg limits
Solution
Concept
Tests for USCS
Step-by-step solution
1. USCS uses grain size (sieve analysis) and plasticity (Atterberg limits).
Explanation
A hydrometer is not needed for classification.
Why the other options are wrong
Only one test is not enough.
Shortcut
USCS = sieve + Atterberg.
Correct answer: C) Sieve analysis and Atterberg limits