Q. In Belgium method of tunneling _________________?
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
ANSWER: construction of roof arch is completed before side walls and invert are built
Answer & Explanation
No explanation is available for this question!
