A. carrying water
B. non-cohesive soils
C. tunnels driven by shield method
D. placement of concrete lining
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. propelling jacks
B. liner plate
C. hood
D. tail
A. soft grounds
B. rock
C. self supporting grounds
D. broken grounds
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. remains same
B. decreases
C. increases by 2.25 times
D. increases by 3.5 times
A. only up holes
B. only down holes
C. horizontal or up holes
D. horizor„al, down or up holes