1000+ Tunnelling Civil Engineering Questions and Answers - 2

Question: 6

For full face method, the excavation to be done generally divided into

(A) two sections

(B) three sections

(C) four sections

(D) five sections

Question: 7

Concrete lining is provided concurrently with the driving operation in case of

(A) soft rock

(B) rock terrain

(C) running soil

(D) none of these

Question: 8

Which one of the following methods is adopted permanent drainage of tunnels

(A) provision of longitudinal drains

(B) grouting with cement or chemicals

(C) continuous open drains

(D) concrete lining

(E) all the above

Question: 9

For B.G. single track railway, the height of the tunnel above top of rails should be

(A) 5.5 m to 5.8 m

(B) 5.8 m to 6.2 m

(C) 6.7 m to 7.3 m

(D) 7.3 m to 7.5 m

Question: 10

If ‘N’ is the number of shafts used, then the total number of faces available for attacking the excavation and construction in tunnels are

(A) 2 N

(B) N + 2

(C) 2 N + 1

(D) 2 N + 2