In “full face” method of constructing tunnels, the first operation relates to______________?

1. drilling and blasting
2. timbering
3. pumg
4. mucking
Select the correct answer using the codes given below Codes?
A. 1,2,3,4
B. 1,4,2,3
C. 2,1,4,3
D. 2,4,1,3

A. 42 D
B. 82 D
C. 104 D
D. 124 D

A. 6 mJ per second per m2 of face area
B. 6 m3 per minute per m2 of face area
C. 20 m3 per minute per m2 of face area
D. 6 m3 per hour per m2 of face area

A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is not the correct explanation of A
C. A is true but R is false
D. A is false but R is true

A. 2 m
B. 3 m
C. 4 m
D. 5 m

A. carrying water
B. non-cohesive soils
C. tunnels driven by shield method
D. placement of concrete lining