1.
A good blast with a good yield is obtained if the cut hole is___________________?

2.
Drifters can be used to drill_________________?

3.
The correct sequence of drilling equipment for increasing size of holes in tunnels is________________?

4.
In compressed air tunneling, the volume of free air provided is______________?

5.
Which of the following lining material is useful for shield driven tunnels in sub aqueous regions ?

6.
Which one of the following tunnelling methods is used for laying under ground sewers ?

7.
The most suitable soil for compressed air tunneling is________________?

8.
Which of the following methods of tunneling is used for long tunnels at great depths ?

9.
What is the correct sequence of the following events in rock tunnelling?
1. marking tunnel profile
2. loading explosives and blasting
3. checking misfire
4. mucking
5. removing foul gas
6. setting up and drilling
7. guniting
Select the correct answer using the codes given below Codes ?

10.
Which one of the following is considered to be an advantage of the heading and benching method of tunnel construction?