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.Management Sciences
Category: Tunnel Engineering
What is the correct sequence of the following events of construction of a shaft in rock ?
1. drilling and blasting
2. timbering
3. pumping
4. mucking
Select the correct answer using the codes given below Codes?
A. 1,2,3,4
B. 1,4,2,3
C. 2,1,4,3
D. 2,4,1,3
In Belgium method of tunneling _________________?
A. construction of side walls is completed before invert and roof arch are built
B. construction of roof arch is completed before side walls and invert are built
C. construction of invert is completed before side walls and roof arch are built
D. construction of invert and side walls is completed before roof arch is built
American method of tunneling________________?
i) is suitable for large sized tunnels
ii) is no,’ suitable for railway or highway tunnel’s
iii) requires heavy timbers
select the correct answer?
A. only (i) is correct
B. (i) and (iii) are correct
C. (ii) and (iii) are correct
D. (i) and (ii) are correct
Which of the following are percussion drills ?
(i) shot drill
(ii) diamond drill
(iii) wagon drill
(iv) churn drill
select correct answer?
A. (i) and (ii) are correct
B. (iii) and (iv) are coiTect
C. (i) and (iv) are correct
D. (ii) and (iii) are correct
The needle beam method of tunneling______________?
(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
select the answer?
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
In “full face” method of constructing tunnels, the first operation relates to______________?
A. removal of bottom portion
B. excavation of one drift in the centre
C. removal of top portion
D. excavation being done along the periphery
Which of the following lining material is useful for shield driven tunnels in sub aqueous regions ?
A. stone masonry
B. timber
C. cast iron
D. cement concrete
As compared to a single free face, if a charge of explosive is placed equidistant from two faces, then the yield___________________?
A. remains same
B. decreases
C. increases by 2.25 times
D. increases by 3.5 times
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 ?
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
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