Tunnel Engineering QUESTIONS AND ANSWERS

Civil Engineering : Tunnel Engineering QUESTIONS AND ANSWERS :: part1 : 21 to 25

Following Civil Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :

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

remains same

decreases

increases by 2.25 times

increases by 3.5 times

22.In Belgium method of tunnelling

construction of side walls is completed before invert and roof arch are built.

construction of roof arch is completed before side walls and invert are built.

construction of invert is completed before side walls and roof arch are built.

construction of invert and side walls is completed before roof arch is built.

23.The most suitable soil for compressed air tunneling is

silt

sand

clay

gravel

24.If 'D' is the diameter of tunnel in metres, then the thickness of lining in mm, as per the empirical formula is given by

42 D

82 D

104 D

124 D

25.Which of the following methods of tunneling is used for long tunnels at great depths ?

Army method

Needle beam method

Austrian method

English method

More Tunnel Engineering QUESTIONS AND ANSWERS available in next pages

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