engineering recuitment Maharashtra WRD Engineering Assistant Civil Mock Test 2023 Highway Engineering Highway Development and Planning
Consider the following statements with respect to various methods of tunnelling:
(i) Drift method is extremely costly and is generally recommended for ground conditions which are difficult to solve.
(ii) Heading and bench method involves the driving of top portion in advance of the bottom portion
(iii) Full face method is suitable for tunnels of small cross-sectional areas through stable rock.
Which of the statements is/are correct?
1
(i) and (iii)
2
(i), (ii) and (iii)
3
(ii) and (iii)
4
(i) and (ii)