Q.1
Assertion A: English method of tunnelling requires more time as compared to other methods of tunnelling.
Reason R: In English method of tunnelling, the masons and excavators have to work alternately
Select your answer based on the coding system given below:
Q.2
Drift method of tunneling is used to construct tunnels in
Q.3
The following tunnels were constructed in different countries for different purposes:
1.Emperor Claudius built the first Roman tunnel
2.The first highway tunnel was constructed in Hungary
3.The first underground railway tunnel was constructed in Great Britain
4.The first navigational tunnel was constructed in France.
The correct chronological development of these tunnels is:
Q.4
American method of tunnelling
(i) Is suitable for large sized tunnels
(ii) Is not suitable for railway or highway tunnels
(iii) Requires heavy timbers
Q.5
If ‘D’ is the diameter of tunnel in meters, then the thickness of lining in mm, as per the empirical formula is given by
Q.6
A tunnel is found more advantageous as compared to the alternate routes because it:
Q.7
Pick up the correct statement from the following during tunnel excavation,
Q.8
In case of drift method of tunnelling, the drift may be excavated at
Q.9
As compared to a single free face, if a charge of explosive is placed equidistant from two faces, then the yield
Q.10
Assertion A: When rock conditions are favorable, it will not be necessary to take up concrete lining concurrently with the driving operations till the full length of the tunnel has been driven through rock.
Reason R: A tunnel through rock, hard or soft, does not need any concrete lining
Select your answer based on the coding system given below:
Q.11
Pick up the correct statement regarding drilling a tunnel from the following:
Q.12
Pick up the correct statement from the following:
Q.13
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
Q.14
Concrete lining is provided concurrently with the driving operation in case of
Q.15
In “full face” method of constructing tunnels, the first operation relates to
Q.16
Which one of the following statements is not correct with regard to heading and henching method of tunnelling?
Q.17
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.
Q.18
If ‘N’ is the number of shafts used, then the total number of faces available for attacking the excavation and construction in tunnels are
Q.19
For highways, tunnelling is preferred to if the open cut exceeds:
Q.20
Forepoling method is generally adopted for tunnelling in:
Q.21
For transferring the tunnel alignment through shafts, we adopt the following steps:
1.Hanging two or more plumb lines in the shaft
2.Determining the bearing of the plumb lines i.e. plumb plane
3.Suspending a 35 kg weight by each plumb line
4.Immersing the weights of both the plumb lines in the buckets containing water
The correct sequence of steps is:
Q.22
Which one of the following is considered to be an advantage of the heading and benching method of tunnel construction?
Q.23
Which one of the following methods is generally adopted for tunnelling in firm ground
Q.24
The following operations are generally employed for tunnelling in hard rock.
1.Removing ground water,
2.Loading holes and firing the explosive
3.Setting up and drilling
4.Grouting and lining
5.Removing muck
6.Ventilation and removing explosion dust
The correct sequence is:
Q.25
An overhead track on a large truss frame is required in case of car changer by
Q.26
Pick up the explosive used for tunnelling in soft rocks from the following:
Q.27
Pick up the mechanical ventilation method used for tunnels from the following:
Q.28
Which one of the following is a component of a shield for tunneling?
Q.29
The correct sequence of drilling equipment for increasing size of holes in tunnels is
Q.30
For initial surveys of tunnels, the following activities are involved:
1.Marking portal point with concrete pillars on the ground
2.Marking tunnel obligatory points on the topographical maps
3.Preliminary setting of the tunnel on the topographical Survey of India maps
4.Driving lines between the fixed obligatory points
The correct sequence of the activities is:
0 h : 0 m : 1 s