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
If ‘N’ is the number of shafts used, then the total number of feces available for attacking the excavation and construction in tunnels are_________________________?
(A) 2N
(B) N + 2
(C) 2 N + 1
(D) 2 N + 2
Which of the following is not a component of the shield ?
(A) propelling jacks
(B) liner plate
(C) hood
(D) tail
If ‘D’ is the diameter of tunnel in meters, then the thickness of lining in mm, as per the empirical formula is given by_________________?
(A) 42 D
(B) 82 D
(C) 104 D
(D) 124 D
Ribs are used for strengthening and stiffening the liner plate for tunnels of diameter greater than_____________________?
(A) 2 m
(B) 3 m
(C) 4 m
(D) 5 m
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
Drift method of tunnelling is used to construct tunnels in__________________?
(A) soft grounds
(B) rock
(C) self supporting grounds
(D) broken grounds
Which one of the following is a component of a shield for tunnelling ?
(A) liner plate
(B) trench jack
(C) stiffener
(D) cutting edge
Which one of the following is considered to be an advantage of the heading and benching method of tunnel construction?
(A) It is suitable for construction in unstable rocks
(B) In this method, it is easy to install timber support
(C) Tunnelling can be continuous and the work can be expedited
(D) In case of excessive water, it is easy to take correct steps
Degree of kinematic indeterminacy of a pin-jointed plane frame is given by______________?
(A) 2j – r
(B) j – 2r
(C) 3j – r
(D) 2j + r