Q9
What is the N-value in SPT testing?
A.
Number of samples taken
B.
Water content
C.
Number of blows for 30 cm penetration
AnswerD.
Number of blows for 60 cm penetration
Answer: Option C
Solution
Answer: Option C
Solution:
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.