Mine Ventilation - Study Mode
[#386] At what % H 2 by volume of air, the lag of ignition of methane is completely eliminated
Correct Answer
(B) 30%
[#387] It has been found that fire damp can came from strata overlying the seam being mined upto distance.
Correct Answer
(C) 250 m
[#388] In III degree gassy mines, the minimum qualification of a shot fires should be . . . . . . . . with gas testing.
Correct Answer
(B) overman certificate
[#389] The delay between ignition and source of heat is known as
Correct Answer
(A) lag of ignition
[#390] If one kg of methane in burning evolves . . . . . . . . KCal of heat.
Correct Answer
(C) 13600