A. stone masonry
B. timber
C. cast iron
D. cement concrete
A. liner plate
B. trench jack
C. stiffener
D. cutting edge
A. 2 m
B. 3 m
C. 4 m
D. 5 m
A. only up holes
B. only down holes
C. horizontal or up holes
D. horizor„al, down or up holes
i) is suitable for large sized tunnels
ii) is no,’ suitable for railway or highway tunnel’s
iii) requires heavy timbers
select the correct answer?
A. only (i) is correct
B. (i) and (iii) are correct
C. (ii) and (iii) are correct
D. (i) and (ii) are correct
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
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.