61. The weathering index of a coal
62. Hardgrove grindability index of four coal samples are given below. Which of them is the easiest to grind?
63. Ionisation potential applied across the electrodes of electrostatic tar precipitator is around
64. A coal having higher volatile matter content, has lower
65. Which of the following fertilisers is produced in the by-products recovery (from coke oven gas) plant attached to an integrated steel plant?
66. A fuel containing carbon and carbon monoxide (but containing no hydrogen or its compounds) is burnt in pure oxygen at constant pressure. Its gross calorific value as compared to net calorific value will be
67. Gross calorific value will be equal to the net calorific value for
68. Power alcohol as compared to straight run gasoline has lower
69. Which of the following petrographic constituents of coal is non-coking?
70. Moisture loss is determined by the
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