Question

Match List-I with List-II and select the correct answer using the code given below the lists:
List-I
A. Geophysical methods
B. SPT
C. DCPT
D. Piston-type sampler
List-II
1. Primarily for cohesive soils
2. Clays and silts
3. Reconnaissance covering large area and large depth
4. Suitable for sandy soils

• A. A - 2 , B - 1, C - 4, D - 3
• B. A - 3 , B - 1, C - 4, D - 2
• C. A - 2 , B - 4, C - 1, D - 3
• D. A - 3 , B - 4, C - 1, D - 2

Answer 1

The correct option is D A - 3 , B - 4, C - 1, D - 2

Piston samplers are used for getting undisturbed soil samples from soft and sensitive clays and silts.
SPT (Standard penetration test) is an in-situ test used especially for cohesionless soils e.g.sandy soils. The test is useful for determining the relative density and the angle of shearing resistance of cohesionless soils. It can also be used for unconfined compressive strength test of cohesive soils.
Geophysical method is used for soil exploration and testing in large areas and large depth.