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What is the N-value in SPT testing

This question belongs to Geological Engineering Site Investigation And Geotechnical Exploration
Site Investigation and Geotechnical Exploration
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What is the N-value in SPT testing?

Answer & Solution
Correct Answer: Option C
The N-value is the number of hammer blows required to drive the sampler 30 cm after an initial 15 cm seating.It helps classify soil consistency and bearing capacity.
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