In a soil investigation work at a site, Standard Penetration Test (SPT) was conducted at every 1.5 m interval up to 30 m depth. At 3 m depth, the observed number of hammer blows for three successive 150 mm penetrations were 8. 6 and 9, respectively. The SPT N-value at 3 m depth, is

In a soil investigation work at a site, Standard Penetration Test (SPT

1.	In a soil investigation work at a site, Standard Penetration Test (SPT) was conducted at every 1.5 m interval up to 30 m depth. At 3 m depth, the observed number of hammer blows for three successive 150 mm penetrations were 8. 6 and 9, respectively. The SPT N-value at 3 m depth, is
A.	23
B.	17
C.	15
D.	14
Answer» D. 14

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In a soil investigation work at a site, Standard Penetration Test (SPT) was conducted at every 1.5 m interval up to 30 m depth. At 3 m depth, the observed number of hammer blows for three successive 150 mm penetrations were 8. 6 and 9, respectively. The SPT N-value at 3 m depth, is

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