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The penetration resistance is driving the sampler __________

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+1 vote
in Geotechnical Engineering II by (93.7k points)
The penetration resistance is driving the sampler __________

(a) 5 cm beyond seating drive

(b) 30 mm beyond seating drive

(c) 30 cm beyond seating drive

(d) 10 cm beyond seating drive

This question was addressed to me in an internship interview.

The above asked question is from Geophysical Methods in chapter Stabilisation of Soils, Site Investigation and Sub – Soil Exploration of Geotechnical Engineering II

1 Answer

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by (243k points)
The correct option is (c) 30 cm beyond seating drive

To explain: When the sampler is driven through depth of first 15 cm, it is known as seating drive. Then the sampler is further driven beyond the seating drive for another 30 cm or 12 inches or until 100 blows have been applied.

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