31. With increases in carbonisation temperature
32. Coke ovens in steel plant are heated by
33. Combustion reaction of fuels is a/an __________ reaction.
34. Which of the following has the highest flame velocity?
35. Which of the following gaseous fuels has the lowest calorific value?
36. As the C/H ratio of the fuel increases, the amount of CO2 formed on combustion __________ for the same percentage of excess air.
37. Which of the following would require least amount of secondary air for combustion?
38. The function of secondary combustion air is to
39. KOH solution used in orsat apparatus absorbs
40. When the coal is heated in absence of air, it is called its
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