Question

Match List-I (Type of exploration) with List-II (Soil profile) and select the correct answer using the codes given below the lists:
List-I
A. Diamond core drilling
B. Uncased wash boring
C. Open pit excavation
D. Cased boring
List-II
1. Medium strong cohesive soils
2. Rocky formation
3. Soft cohesive soils and cohesionless soils.
Exploration up to relatively large depths
4. Exploration up to a shallow depth below ground level

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

Answer 1

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

In diamond core drilling, the drill uses a diamond encrusted drill bit to drill through the rock.
Cased boring is done tor larger depths in cohesive or cohesionless soils. Casing prevents the falling of soil into bore.