51. Caking index of coal blend used for blast furnace coke making is about
52. Purity of coke means that, it is high in carbon and low in
53. Temperature of preheated air used for the transportation of pulverised coal through pipes to the burner of a boiler furnace is restricted to a maximum limit of about 300° C to avoid the
54. A coal containing high amount of volatile matter will have
55. The bright glow of a combustion process is the characteristic of __________ temperature oxidation of coal.
56. Junker's calorimeter is used to determine the calorific value of
57. A fuel with high heat release rate will
58. Out of the following, which is the most important parameter for the blast furnace grade coke?
59. The hottest part of the flame lies in its____zone.
60. The fuel ratio of a coal is
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