Discussion
The standard penetration test measures the resistance of soil to
Answer: B
Correct answer: driving a split spoon sampler a stated distance
The test drives a standard split spoon into the base of a borehole with a 63.5 kg hammer falling 760 mm, and the blow count for the second and third 150 mm increments is the N value. It is crude, and correlations from it are empirical, but it is cheap, universally understood and returns a disturbed sample at the same time.
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