Civil Engineering > GATE 2023 SET-2 > Soil Exploration
A standard penetration test (SPT) was carried out at a location by using a manually operated hammer dropping system with 50% efficiency. The recorded SPT value at a particular depth is 28. If an automatic hammer dropping system with 70% efficiency is used at the same location, the recorded SPT value will be
A
28
B
20
C
40
D
25

Correct : a

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Standard Penetration Test SPT hammer efficiency SPT N value correction Civil Engineering GATE 2023 GATE CE 2023 Set-2 Q18 soil mechanics SPT geotechnical engineering SPT recorded value

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