Discussion
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- Question
Pick up the explosive used for tunnelling in soft rocks from the following :
Options- A. blasting gelatine
- B. special gelatine
- C. ammonia dynamite
- D. semi-gelatine.
- Correct Answer
- ammonia dynamite
- 1. Which one of the following linings is suitable for shield driven tunnels particularly in the subaqueous regions :
Options- A. Brick lining
- B. stone lining
- C. timber line
- D. cast iron lining
- E. concrete lining. Discuss
- 2. The reduced level of third floor of a building near a column is 205.350 m. The reduced levels of the undersides of four beams supporting the fourth floor framing into the column mutually perpendicular are 208.350 m, 208.450 m, 208.500 m and 208.550 m. The supported length of the column is
Options- A. 3.000 m
- B. 3.100 m
- C. 3.150 m
- D. 3.200 m Discuss
- 3. The test strength of the sample is taken as the average of the strength of
Options- A. 2 specimens
- B. 3 specimens
- C. 4 specimens
- D. 5 specimens Discuss
- 4. For the reinforced concrete member totally immersed in sea water, the normal cover provided for the reinforcing bars is further increased by
Options- A. 10 mm
- B. 20 mm
- C. 30 mm
- D. 40 mm
- E. 50 mm Discuss
- 5. For rolled I-beams and channels, permissible tensile and compressive stresses does not exceed
Options- A. 1400 kg/cm2
- B. 1500 kg/cm2
- C. 1650 kg/cm2
- D. 1800 kg/cm2 Discuss
- 6. Which one of the following statements is not correct in respect of setting of an inclined tunnel:
Options- A. Reference points are constructed at every 300 m.
- B. The alignment is fixed from upper/lower apex point.
- C. The level of the invert at the heading is marked by a tape.
- D. Reference points are constructed on the roof of tunnels
- E. None the above. Discuss
- 7. To attain the required shape of the tunnel section, we use :
Options- A. easers
- B. trimmers
- C. cut holes
- D. chisels. Discuss
- 8. High pressure grouting is generally restored for concreting in the lining if the rock strata is:
Options- A. highly fissured
- B. poor
- C. likely to get seepage of water
- D. All of the above. Discuss
- 9. The most commonly adopted pattern of cut holes is :
Options- A. horizontal wedge cut
- B. pyramid cut
- C. fan cut
- D. V-cut
- E. All the above. Discuss
- 10. For highways, tunnelling is preferred to if the open cut exceeds :
Options- A. 10 metres depth
- B. 15 metres depth
- C. 20 metres depth
- D. 25 metres depth. Discuss
Tunnelling problems
Search Results
Correct Answer: cast iron lining
Correct Answer: 3.000 m
Correct Answer: 3 specimens
Correct Answer: 40 mm
Correct Answer: 1650 kg/cm2
Correct Answer: None the above.
Correct Answer: trimmers
Correct Answer: All of the above.
Correct Answer: All the above.
Correct Answer: 15 metres depth
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