Which of the following is not a component of the shield ?
Which of the following is not a component of the shield ?
A. propelling jacks
B. liner plate
C. hood
D. tail
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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________________?
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________________?A. Both A and R are true and R is the correct explanation of A
B. Both A and R are true but R is not the correct explanation of A
C. A is true but R is false
D. A is false but R is trueAssertion 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/
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/A. Both A and R are true and R is the correct explanation of A.
B. Both A and R are true and R is not the correct explanation of A.
C. A is true but R is false.
D. A is false but R is true.Which of the following lining material is useful for shield driven tunnels in sub aqueous regions ?
Which of the following lining material is useful for shield driven tunnels in sub aqueous regions ?A. stone masonry
B. timber
C. cast iron
D. cement concreteWhich of the following methods of tunneling is used for long tunnels at great depths ?
Which of the following methods of tunneling is used for long tunnels at great depths ?A. Army method
B. Needle beam method
C. Austrian method
D. English methodWhich one of the following is considered to be an advantage of the heading and benching method of tunnel construction?
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 stepsWhich one of the following tunnelling methods is used for laying under ground sewers ?
Which one of the following tunnelling methods is used for laying under ground sewers ?A. Needle beam method
B. Army method
C. German method
D. Italian method