41. If oxygen content in the flue gas rises too high, fuel is being wasted by
42. Coking time in beehive coke oven is about
43. Too much of excess air in combustion results in high
44. Catalyst used in Fischer-Tropsch process is
45. The cuprous chloride used in orsat apparatus can absorb
46. Pick out the wrong statement.
47. The pyragallol solution used in orsat apparatus can absorb
48. Use of preheated air for combustion of fuel in the furnace, increases the
49. C.V. (kcal/Nm3) of gaseous fuels __________ with increase in molecular weight.
50. 'Wobbe index' is a characteristic of
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