Q.1.
A good blast with a good yield is obtained if the cut hole is
Q.2.
The length of the needle beam used in needle beam method of tunnelling is usually
Q.3.
Which one of the following methods of tunnelling does not require the use of time bearing?
Q.4.
Circular section of tunnels is not suitable for
Q.5.
Which one of the following statements is not correct in respect of setting of an inclined tunnel?
Q.6.
Drifters can be used to drill
Q.7.
In case of drift method of tunnelling, the drift may be excavated at
Q.8.
Pick up the correct statement from the following during tunnel excavation,
Q.9.
The following tunnels were constructed in different countries for different purposes: 1.Emperor Claudius built the first Roman tunnel2.The first highway tunnel was constructed in Hungary3.The first underground railway tunnel was constructed in Great Britain4.The first navigational tunnel was constructed in France.The correct chronological development of these tunnels is:
Q.10.
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 alternatelySelect your answer based on the coding system given below:
Q.11.
As compared to a single free face, if a charge of explosive is placed equidistant from two faces, then the yield
Q.12.
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 liningSelect your answer based on the coding system given below:
Q.13.
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.14.
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.15.
In the given figure drill holes, heading, mucking and benching are numbered asThe correct sequence is:
Q.16.
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.17.
In “full face” method of constructing tunnels, the first operation relates to
Q.18.
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.19.
For highways, tunnelling is preferred to if the open cut exceeds:
Q.20.
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.21.
Pick up the explosive used for tunnelling in soft rocks from the following:
Q.22.
Pick up the mechanical ventilation method used for tunnels from the following:
Q.23.
Pick up the correct statement regarding drilling a tunnel from the following:
Q.24.
What is the correct sequence of the following events in rock tunnelling?1.Marking tunnel profile2.Loading explosives and blasting3.Checking misfire4.Mucking5.Removing foul gas6.Setting up and drilling7.GunitingSelect the correct answer using the codes given below.
Q.25.
For transferring the tunnel alignment through shafts, we adopt the following steps: 1.Hanging two or more plumb lines in the shaft2.Determining the bearing of the plumb lines i.e. plumb plane3.Suspending akg weight by each plumb line4.Immersing the weights of both the plumb lines in the buckets containing waterThe correct sequence of steps is: