Question

Consider the following statements:
1. Dynamic cone penetration test for site investigation is based on the principle that elastic shock waves travel in different materials at different velocities.
2. Electrical resistivity method of subsurface investigation is capable of detecting only the strata having different electrical resistivity.
3. In-situ vane shear test is useful, for determining the shear strength of very soft soil and sensitive clays and is unsuitable for sandy soil.
Which of these statements is/are correct ?

• A. 1 and 2
• B. 1 and 3
• C. 2 and 3
• D. 2 alone

Answer 1

The correct option is C 2 and 3

(c) Dynamic cone penetration test is used to obtain continuous record of soil resistance by driving the cone using 65 kg falling weight and counting the number of blows for every 10 cm penetration.