21. Capacity of slusher is . . . . . . . . tph.
22. The type explosives selected for breaking in hard rock and tunnels.
23. Using the following data, calculate the NVP in a mine
Depth of mine = 400 m;
Barometer reading in DC shaft 750 mm of Hg;
Average temperature in DC shaft 28°C;
Average temperature in UC shaft 38°C.
Depth of mine = 400 m;
Barometer reading in DC shaft 750 mm of Hg;
Average temperature in DC shaft 28°C;
Average temperature in UC shaft 38°C.
24. The rearrangement of pit bottom layout distroys the strength of . . . . . . . .
25. Calculate the wg. produced by 3 m dia fan running at 250 rpm and deliver 6000 m3/min of air, if the blades are radial in mm w.g of the blade tip speed is 39.3 m/sec.
26. Weight of gas mask . . . . . . . . kg.
27. Moderate seams the thickness of coal in between.
28. The formula for finding the of air flow in m3/min.
29. The detonating pressure in blasting hole occurs.
30. The ignition temperature of anthracite coal is nearly . . . . . . . .°C.
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 7
- Drilling and Blasting - Section 8
- Drilling and Blasting - Section 9
- Drilling and Blasting - Section 10