5. Site Investigation

In-situ Testing — Quiz

Test your understanding of in-situ testing with 5 practice questions.

Practice Questions

Question 1

Which in-situ test is most suitable for determining the undrained shear strength ($c_u$) of very soft, sensitive clays where sample disturbance is a major concern?

Question 2

The Cone Penetration Test (CPT) measures two primary parameters: cone tip resistance ($q_c$) and sleeve friction ($f_s$). How is the friction ratio ($R_f$) calculated from these parameters?

Question 3

A Pressuremeter Test (PMT) involves expanding a cylindrical probe in a borehole. What is the primary geotechnical parameter derived from the pressure-expansion curve obtained during this test?

Question 4

In the Standard Penetration Test (SPT), the 'N-value' is the number of blows required for the split-spoon sampler to penetrate a specific distance. What is this standard penetration distance?

Question 5

Which of the following in-situ tests provides a continuous profile of soil behavior type (SBT) based on the relationship between cone tip resistance ($q_c$) and friction ratio ($R_f$)?