26. The method of draining in the tunnels, is generally known as A. Foredrainage B. Dewatering C. Permanent drainage D. All of the above Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
27. In the wooded bulk-head, used for mucking in steep grade tunnels, A. One opening is provided B. Two openings are provided C. Three openings are provided D. No opening is provided Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
28. Ribs are used for strengthening and stiffening the liner plate for tunnels of diameter greater than A. 2 m B. 3 m C. 4 m D. 5 m Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
29. For B.G. single track railway, the height of the tunnel above top of rails should be A. 5.5 m to 5.8 m B. 5.8 m to 6.2 m C. 6.7 m to 7.3 m D. 7.3 m to 7.5 m Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
30. A good blast with a good yield is obtained if the cut hole is A. Normal to face B. Inclined at 45° to the face C. Inclined at 15° to the face D. Inclined at 30° to the face Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
