1000+ Tunnel Engineering Objective Type Questions and Answers - 2

Question: 6

For tunnels exceeding 300 m in length, the grade should be provided below

(A) 80% of the ruling gradient

(B) 75% of the ruling gradient

(C) 60% of the ruling gradient

(D) 50% of the ruling gradient

Question: 7

Which one of the following linings is suitable for shield driven tunnels particularly in the subaqueous regions

(A) cast iron lining

(B) brick lime

(C) stone lining

(D) timber line

Question: 8

For highways, tunnelling is preferred to if the open cut exceeds

(A) 10 metres depth

(B) 12 metres depth

(C) 15 metres depth

(D) 20 metres depth

Question: 9

Which one of the following methods is generally adopted for tunneling in firm ground

(A) drift method

(B) top heading and benching method

(C) full face method

(D) all the above

Question: 10

An overhead track on a large truss frame is required in case of car changer by

(A) the passing track method

(B) California crossing method

(C) Dixon conveyor method

(D) the grass hopper method