71. The difference between total carbon and fixed carbon of coal will be minimum in case of
72. With increase in the oxygen content of the coal, its __________ decreases.
73. Gobar gas constitutes mainly of
74. Producer gas comprises mainly of
75. Flue gas from the heating chamber of byproduct coke ovens is removed by
76. Furnace oil consumption in a furnace for a given duty employing preheated combination air (at 300° ) may be reduced by about __________ percent as compared to the use of atmospheric combustion air.
77. Removal of hydrogen from coke oven gas
78. A coal that softens and fuses on heating is
79. Coke having higher porosity has
80. Critical Air Blast (CAB) value of coke is a direct measure of its
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