Practice Test: Question Set - 06
1. The method of draining in the tunnels, is generally known as
- (A) Foredrainage
- (B) Dewatering
- (C) Permanent
drainage
- (D) All
of the above
2. For highways, tunnelling is preferred to if the open cut exceeds:
- (A) 10 meters
depth
- (B) 15
meters depth
- (C) 20
meters depth
- (D) 25
meters depth
3. Pick up the explosive used for tunnelling in soft rocks from the following:
- (A) Blasting
gelatine
- (B) Special
gelatine
- (C) Ammonia
dynamite
- (D) Semi-gelatine
4. What is the correct sequence of the following events in rock tunnelling?
- Marking tunnel profile
- Loading explosives and blasting
- Checking misfire
- Mucking
- Removing foul gas
- Setting up and drilling
- 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
5. For B.G. single track, the section of the tunnel must have a width
- (A) 4.2 m to 4.5
m
- (B) 4.5 m to 4.8
m
- (C) 4.9 m to 5.5
m
- (D) 5.5 m to 5.8
m
6. The concentration of the dust particles of the size 0.5 to 5 microns adjacent to the working face should not be more than
- (A) 200
particles/cm3
- (B) 250
particles/cm3
- (C) 300
particles/cm3
- (D) 450
particles/cm3
7. To attain the required shape of the tunnel section, we use:
- (A) Easers
- (B) Trimmers
- (C) Cut holes
- (D) Chisels
8. For B.G. single track railway, the height of the tunnel above top of rails should be
- (A) 5.5
m to 5.8 m
- (B) 5.8 m to 6.2
m
- (C) 6.7 m to 7.3
m
- (D) 7.3 m to 7.5
m
9. The following operations are generally employed for tunnelling in hard rock.
- Removing ground water,
- Loading holes and firing the explosive
- Setting up and drilling
- Grouting and lining
- Removing muck
- Ventilation and removing explosion dust
- (A) 3, 2, 6, 5,
1, 4
- (B) 3, 4, 6, 1,
5, 2
- (C) 4, 1, 2, 3,
6, 5
- (D) 5, 4, 2, 1,
3, 6
10. Pick up the correct statement regarding drilling a tunnel from the following:
- (A) Holes are
drilled by pneumatically operated rock drills
- (B) One
drill is required for each 4 to 5 m2 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
11. The most commonly adopted pattern of cut holes is:
- (A) Horizontal
wedge cut
- (B) Pyramid cut
- (C) Fan cut
- (D) All the
above
12. Concrete lining is provided concurrently with the driving operation in case of
- (A) Rock terrain
- (B) Soft rock
- (C) Running soil
- (D) None of
these
13. Which one of the following methods is generally used for the layout of the muck-car tracks?
- (A) The grass
hopper method
- (B) Passing
track method
- (C) The
cherry picker
- (D) All the
above
14. The tunnels, the artificial underground passages are constructed for:
- (A) Highways
- (B) Railways
- (C) Sewerage
- (D) All
the above
15. Pick up the correct statement from the following:
- (A) The
topographical maps of the Survey of India are useful in the mountainous region
for tunnelling
- (B) The
height point on the ridge is fixed with the help of reciprocal ranging
- (C) The accuracy
of 1 in 10,000 is required for planimetric control
- (D) All
the above
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