Mine Ventilation MCQs Questions & Answers | Mining Engineering

A. 11.6

B. 12.6

C. 14.6

D. 13.6

A. 190 × 70 × 50 mm

B. 192 × 80 × 50 mm

C. 200 × 80 × 60 mm

D. 170 × 80 × 40 mm

A. 200°C

B. 300°C

C. 400°C

D. 450°C

A. 3%

B. 8%

C. 5%

D. 10%

A. diffusion

B. wheat stone bridge

C. reaction of methane with chemicals

D. difference in refractive index

A. CO₂

B. CO₂N₂

C. CO

D. H₂S

A. Hg thermometer

B. alcholal thermometer

C. colour alcholal thermometer

D. all of these

A. relative humidity

B. saturded air

C. kent

D. absolute humidity

A. $$\frac{{Tu + Td}}{{273 + Tu}} \times D$$

B. $$\frac{{Tu - Td}}{{273 + Tu}} \times D$$

C. $$\frac{{Tu - Td}}{{273 - Tu}} \times D$$

D. $$\frac{{Tu + Td}}{{273 - Tu}} \times {D^2}$$

A. value of P_H increases

B. value of P_H decreases

C. neutral

D. P_H value first increase and these decrease