11. The production of CO in mine may be due to
12. The specific gravity of methane.
13. Wet kata for sedentary workers is
14. The lag of ignition of CH4 is increase with
15. Bleader ventilation is for the control of
16. The limits of explosibility of methane is explained in this diagram.
17. GL 60 flame safety lamp detects.
18. The absolute temperature is also known as
19. A pitot tube should be used in conjuction with sensitive . . . . . . . .
20. The weight of D6 methanometer . . . . . . . .
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