91. Name the instrument to measure incubation period . . . . . . . .
92. The barrier must be provided at a distance of not less than . . . . . . . .m from nearest working face at not more than . . . . . . . .m from farthest face.
93. With reference to coward diagram, match the following the context of explosibility of a mixture of normal air and methane air
O2% ; CH4%
Mixture Status
a. 20.5 ; 2.4
1. Impossible mixture
b. 19.0 ; 9.5
2. Non explosive
c. 17.0 ; 19
3. Potentially Explosive
d. 20 ; 19.5
4. Explosive
| O2% ; CH4% | Mixture Status |
| a. 20.5 ; 2.4 | 1. Impossible mixture |
| b. 19.0 ; 9.5 | 2. Non explosive |
| c. 17.0 ; 19 | 3. Potentially Explosive |
| d. 20 ; 19.5 | 4. Explosive |
94. Smoke helmet having . . . . . . . . eye pieces fitted in alluminium frame.
95. A person inhales . . . . . . . . l/min, the O2 consumption . . . . . . . . l/min when doing normal work.
96. The proto mark IV apparatus O2 cylinder made of . . . . . . . . and empty capacity . . . . . . . .
97. Fibre, charcoal, wood meal, sulphur in explosive composition act as . . . . . . . .
98. The drilling pattern followed in underground coal mine is
99. Number of swings of shovel for loading one dumper is . . . . . . . .
100. Empty, cylinder capacity of BG 174 is . . . . . . . . litters.
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 2
- Drilling and Blasting - Section 3
- Drilling and Blasting - Section 4
- Drilling and Blasting - Section 5
- Drilling and Blasting - Section 6
- Drilling and Blasting - Section 8
- Drilling and Blasting - Section 9
- Drilling and Blasting - Section 10