Question: Pick up the correct statement regarding drilling a tunnel from the following:
Options
A : Holes are drilled by pneumatically operated rock drills
B : One drill is required for each 4 to 5 m 2 force area
C : The diameter of the bore hole at the deepest point should be 6 mm more than the diameter of the cartridge
D : All of the above.
Tunnelling - Part 1 more questions
For determining the support reactions at A and B of....
Pick up the incorrect statement from the following : The....
Which one of the following statements is not correct for....
The difference of heights of the tunnels above rail tops....
For B.G. single track railway, the height of the tunnel....
For tunnels exceeding 300 m in length, the grade should....
The method of draining in the tunnels, is generally known....
To attain the required shape of the tunnel section, we....
Which one of the following linings is suitable for shield....
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