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UPSC Civil Service Exam Questions

Q1: Consider the following statements :
1. The standard penetration test is a reliable method for measuring the relative density of granular soils.
2. For a sand having the same relative density, N-values remain the same at all depths.
3. For a sand having the same relative density, N-values are different at different depths.
Which of the statements given above is/are correct ?

A 1, 2 and 3

B 1 and 2

C only 3

D 1 and 3

ANS:D - 1 and 3

OPTION C is correct.

The Standard Proctor Test (SPT) gives the relation between Yd vs moisture, not a standard penetration test.

N value is a function of depth and increases with depth.



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