21. The warning signal to indicate approaching . . . . . . . .
22. FOR in term of mining field means
23. A place is considered to be dangerous due to gas if it is . . . . . . . . or more.
24. The main disadvantage of run-round arrangement is . . . . . . . .
25. Calculate the w.g produced by a 3.2 m diameter fan running at 280 rpm and delivering 7500 m3/min. of air, if the blades are radial, density of air 1.2 kg/m3.
26. The value of natural ventilation pressure is not considerably affected by
27. Sealed canisters have shelf life in gas mask is . . . . . . . . years.
28. The fittings in fire stopping are
29. Smoke helmet made of tough . . . . . . . .
30. Drivage along apparent dip is . . . . . . . .
Read More Section(Drilling and Blasting)
Each Section contains maximum 100 MCQs question on Drilling and Blasting. To get more questions visit other sections.
- Drilling and Blasting - Section 1
- Drilling and Blasting - Section 3
- Drilling and Blasting - Section 4
- Drilling and Blasting - Section 5
- Drilling and Blasting - Section 6
- Drilling and Blasting - Section 7
- Drilling and Blasting - Section 8
- Drilling and Blasting - Section 9
- Drilling and Blasting - Section 10