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Tunnel Engineering

Tunnel Engineering



A good blast with a good yield is obtained if the cut hole is___________________?
0

A. normal to face
B. inclined at 45° to the face
C. inclined at 15° to the face
D. inclined at 30° to the face

Drifters can be used to drill_________________?
0

A. only up holes
B. only down holes
C. horizontal or up holes
D. horizor„al, down or up holes

The correct sequence of drilling equipment for increasing size of holes in tunnels is________________?
0

A. wagon drill, churn drill, shot drill
B. wagon drill, shot drill, churn drill
C. shot drill, churn drill, wagon drill
D. churn drill, wagon drill, shot drill

In compressed air tunneling, the volume of free air provided is______________?
0

A. 6 mJ per second per m2 of face area
B. 6 m3 per minute per m2 of face area
C. 20 m3 per minute per m2 of face area
D. 6 m3 per hour per m2 of face area

Which of the following lining material is useful for shield driven tunnels in sub aqueous regions ?
0

A. stone masonry
B. timber
C. cast iron
D. cement concrete

Which one of the following tunnelling methods is used for laying under ground sewers ?
0

A. Needle beam method
B. Army method
C. German method
D. Italian method

The most suitable soil for compressed air tunneling is________________?
0

A. silt
B. sand
C. clay
D. gravel

Which of the following methods of tunneling is used for long tunnels at great depths ?
0

A. Army method
B. Needle beam method
C. Austrian method
D. English method

What is the correct sequence of the following events in rock tunnelling?
0

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 ?

A. 1,6,5,3,4,2,7
B. 1,2,6,3,5,4,7
C. 1, 6,2, 5,4, 3, 7
D. 1,6,2,5,3,4,7

Which one of the following is considered to be an advantage of the heading and benching method of tunnel construction?
0

A. It is suitable for construction in unstable rocks
B. In this method, it is easy to install timber support
C. Tunnelling can be continuous and the work can be expedited
D. In case of excessive water, it is easy to take correct steps



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