31. Leakage of intake to return at . . . . . . . .
32. If CO2 replaces air by . . . . . . . .% headache of person causes.
33. Is the OXD-2M instrument is
34. Middle infra-red region has special significance for detection of
35. The algebric sum of static pressure and velocity pressure called as . . . . . . . .
36. Methane drainage being experienced at . . . . . . . . colliery in India.
37. The gas with bitter taste is
38. 100 Vol. of water at 20°C dissolves about . . . . . . . . vol. of oxygen.
39. If CO2 replaces air by . . . . . . . .% death after hours.
40. Carbon monoxide imparts a . . . . . . . . to the blood.
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