Drilling And Blasting - Study Mode

[#511] Permitted explosives used in mines have a VOD ranging from in m/sec.
Correct Answer

(B) 2500 - 5000

[#512] Minimum quantity of air required for ventilation of coal mine depends on
Correct Answer

(B) Man power employed

[#513] The coolest used in 1 hr. apparatus of proto mark V apparatus.
Correct Answer

(C) CaCl 2

[#514] Shape factor is defined by . . . . . . . .
Correct Answer

(A) $$frac{{{ ext{Perimeter}}}}{{{{{ ext{(Area)}}}^{frac{1}{2}}}}}$$

[#515] The quantity of air has to be increased from 1500m 3 to 3000 m 3 /mm, what will be effect on H. P of the fan.
Correct Answer

(C) 8