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Engineering Geology: Tunnel Investigation and Ground Water Control
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Engineering Geology: Tunnel Investigation and Ground Water Control
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25 Questions

1. Geologically, how many classes of tunnels are recognized?
2. The porosity range of limestone is __________
3. Type of tunnels which are excavated to divert the traffic load of whatsoever type from surface to subsurface routes.
4. What is usually the nature of connate water?
5. Underground excavations for carrying pipes, sewage etc. fall under which type?
6. Selection of excavation method depends on __________
7. What occurs due to falling of big rock blocks or sides due to release of stresses during tunnelling?
8. Tunnels associated with hydropower generation are called __________
9. What is the volume of voids in a rock mass expressed in percentage of total volume of rock called?
10. What is the isolated water table held by a small extension of impervious rock called?
11. Lithology does not affect which parameter?
12. The water which in a state of downward movement under gravity is __________
13. What is the water obtained from precipitation called?
14. At many places where is the piezometric surface with respect to the ground level?
15. Layers dipping at angles up to 45° may be called __________
16. Metamorphic rocks that are inherently fractured and foliated may prove to be good aquifers.
17. Method of placing tubes in public utility tunnels is called __________
18. Type of hydropower tunnel where water is conveyed under gravity is __________
19. What is the upper surface of the zone saturation called?
20. What is the speciality of the Artesian Water?
21. What is the upper surface of water in a confined aquifer called?
22. Aquifers are distinguished into how many types on the basis of physical conditions under which water can exist in them?
23. Pick the rock considered as soft rocks for tunnelling.
24. What is the process of movement downwards of vadose water called?
25. When can the rocks act as a natural arch?