Practice Test: Question Set - 03
1. Drifters can be used to drill
- (A) Only
up holes
- (B) Only
down holes
- (C) Horizontal
or up holes
- (D) Horizontal
down or up holes
2. Circular section of tunnels is not suitable for
- (A) Carrying
water
- (B) Non-cohesive
soils
- (C) Tunnels
driven by shield method
- (D) Placement
of concrete lining
3. A tunnel is found more advantageous as compared to the alternate routes because it:
- (A) Remains free
from snow
- (B) Reduces
the cost by reducing the route distance
- (C) Reduces
the maintenance cost
- (D) All the
above
4. Which one of the following statements is not correct for heading and benching method of tunnelling?
- (A) Drilling
and mucking can be done simultaneously
- (B) Benching
provides a platform for working on heading
- (C) Removal of
muck from the heading is very easy
- (D) None of
these
5. Pick up the mechanical ventilation method used for tunnels from the following:
- (A) Blowing
fresh air by ducts to the face of tunnel
- (B) Exhausting
foul air by ducts from the face of the tunnel and permitting fresh air through
the tunnel
- (C) Blowing
fresh air and exhausting foul air by ducts
- (D) All the
above
6. For initial surveys of tunnels, the following activities are involved:
- Marking portal point with concrete pillars on the ground
- Marking tunnel obligatory points on the topographical maps
- Preliminary setting of the tunnel on the topographical Survey of India maps
- Driving lines between the fixed obligatory points
- (A) 3, 2, 4, 1
- (B) 1, 2, 3, 4
- (C) 4, 3, 1, 2
- (D) 2, 4, 3, 1
7. Which one of the following methods is generally adopted for tunnelling in firm ground
- (A) Full face
method
- (B) Top
heading and benching method
- (C) Drift
method
- (D) All
the above
8. Which one of the following methods is adopted for permanent drainage of tunnels?
- (A) Provision
of longitudinal drains
- (B) Continuous
open drains
- (C) Concrete
lining
- (D) All the
above
9. The needle beam method of tunnelling
(i) Is
suitable for soils in which roof can stand for few minutes without support
(ii) Is
suitable for brick lining
(iii) Is
suitable for concrete lining
(iv)
Requires large number of trench jacks
Of these
statements
- (A) Only (i) is
correct
- (B) (i), (ii)
and (iv) are correct
- (C) (i), (iii)
and (iv) are correct
- (D) (i) and (ii)
are correct
10. If ‘N’ is the number of shafts used, then the total number of faces available for attacking the excavation and construction in tunnels are
- (A) 2N
- (B) N + 2
- (C) 2N + 1
- (D) 2N + 2
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