Civil Engineering MCQs

Page No. 120

The needle beam method of tunneling______________?


ais suitable for soils in which roof can stand for few minutes without support


bis suitable for brick lining


crequires large number of trench jacks


dAll of the avove


View Answer All of the avove

Assertion A : English method of tunneling requires more time as compared to other methods of tunneling. Reason R : In English method of tunneling, the masons and excavators have to work alternately/


aBoth A and R are true and R is the correct explanation of A.


bBoth A and R are true and R is not the correct explanation of A.


cA is true but R is false.


dA is false but R is true.



Which of the following are percussion drills ?


ashot drill


b wagon drill


cchurn drill


dOnly (B) and (C)


View Answer Only (B) and (C)

What is the correct sequence of the following events of construction of a shaft in rock ?


a drilling and blasting


btimbering


cpumping


dmucking



As compared to a single free face, if a charge of explosive is placed equidistant from two faces, then the yield___________________?


aremains same


bdecreases


c increases by 2.25 times


dincreases by 3.5 times



Circular section of tunnels is not suitable for________________?


acarrying water


bnon-cohesive soils


ctunnels 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_________________________?


a2N


bN + 2


c 2 N + 1


d2 N + 2


View Answer 2 N + 2

Which of the following is not a component of the shield ?


apropelling jacks


bliner plate


chood


dtail


View Answer liner plate

If ‘D’ is the diameter of tunnel in meters, then the thickness of lining in mm, as per the empirical formula is given by_________________?


a42 D


b 82 D


c104 D


d 124 D


View Answer 82 D

Ribs are used for strengthening and stiffening the liner plate for tunnels of diameter greater than_____________________?


a2 m


b3 m


c4 m


d5 m


View Answer 3 m

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