Tunnel Engineering - Study Mode
[#16] "Consider the following situations. 1.Soil is soft. 2.Volume of existing surface traffic on the alignment is heavy. 3.Track is at a deeper level. 4.Water table is high. In the construction of Metro Railways, “Cut and Cover” method of construction is suitable in situations listed at
"
Correct Answer
(C) 1 and 4
[#17] For tunnels exceeding 300 m in length, the grade should be provided below
Correct Answer
(C) 75% of the ruling gradient
[#18] In case of railways,
Correct Answer
(C) Tunnelling is preferred
[#19] Which one of the following tunneling methods is used for laying underground sewers?
Correct Answer
(B) Army method
[#20] In compressed air tunnelling, the volume of free air provided is
Correct Answer
(B) 6 m 3 per minute per m 2 of face area