Mine Ventilation MCQs Questions & Answers | Mining Engineering

A. 20%

B. 30%

C. 35%

D. 40%

A. 200 m

B. 300 m

C. 250 m

D. 300 m

E. 450 m

A. shot firer certificate

B. overman certificate

C. sirdar certificate

D. manager's certificate

A. lag of ignition

B. incubation period

C. saturation

D. thermal conductivity

A. 500

B. 1500

C. 13600

D. 15000

A. 100°C

B. 140°C

C. -140°C

D. -150°C

A. recommended

B. not recommended

C. co produced noticable cap

D. co burns with bluish flame

A. radial blades

B. backward blades

C. forward blades

D. none

A. $$\frac{{{V_2}}}{{{V_1}}} = \frac{{{T_2}}}{{{T_1}}} = \frac{{273 + {C_2}}}{{273 + {C_1}}} = {\text{Constant}}$$

B. $$\frac{{RA}}{{RB}} = \sqrt {\frac{{DB}}{{DA}}} $$

C. $$\frac{{{P_1}{V_1}}}{{{T_1}}} = \frac{{{P_2}{V_2}}}{{{T_2}}} = {\text{Constant}}$$

D. $$\frac{{0.4645B}}{{273 + t}}$$

A. 25 atoms

B. 30 atoms

C. 35 atoms

D. 40 atoms