11. The basic principle behind the pressure survey in a mine is depend as . . . . . . . . theorem. A. Archemedis B. Bernouili's C. Torricelli's D. Hydro dynamic Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
12. What is the characteristic of velocities considered in Euler's equation. A. It is the average velocity over the cross section perpendicular to the direction of flow B. It is the true velocities over the air shaft C. It is the head developed by the centrifugal fan D. It is due to the torque generated by the fan itself Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
13. If the electricity is used the motors, switch gears and transformers should be provided with . . . . . . . . enclosures. A. Intrensically safe B. Fire proof C. Water proof D. Flame proof Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
14. Horizontal roadway driven within ore body between h/w and f/w right angles to drift. A. Cross drive B. Cross cut C. Crossing D. Cut Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
15. The minimum air quantity required at all working places in B/P is. A. 600 m3/min B. 80 m3/min C. 60 m3/min D. 50 m3/min Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
16. Small magzines in mine premises are accorded the licence in the form. A. A B. J C. L D. D Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
17. The plane of rotation of the vanes of anemometer should be as near as A. Parallel to the direction of flow B. Inclined air flow C. Normal to the direction of air flow D. None Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option C No explanation is given for this question Let's Discuss on Board
18. When explosive charges in a hole is separated by air gaps in stead of stemming materials then the process is known as A. Deck loading B. Air decking C. Detonating D. Priming Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
19. To deal with the misfires a relieving hole shall be so placed that at no point shall it be nearer than "A" cm from the misfired hole. A is given by A. 5 cm B. 15 cm C. 20 cm D. 30 cm Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
20. The isolation stopping in I and II degree gassy coal mine should have minimum thickness of A. 1m B. 2m C. 3m D. 4m Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
