- (A) Electricity
- (B) Coke oven gas
- (C) Mixed gas
- (D) Both
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- (A) Produced by low temperature carbonisation of coal
- (B) A domestic fuel
- (C) Used in blast furnaces
- (D) None of these
- (A) Lignites
- (B) Bituminous coals
- (C) Semi-anthracites
- (D) Anthracites
- (A) High rank coals have higher amount of volatile matter
- (B) Ratio of fixed carbon to volatile matter increases
- (C) Oxygen content progressively decreases
- (D) Calorific value of the coal increases
- (A) 2
- (B) 4
- (C) 6
- (D) 1
- (A) 1500
- (B) 3300
- (C) 5400
- (D) 8500
- (A) Much lower
- (B) Much higher
- (C) Same
- (D) Either lower or higher, depends on the type of fuel
- (A) 1
- (B) 5
- (C) 50
- (D) 100
- (A) Sulphur
- (B) Oxygen
- (C) Hydrogen
- (D) Carbon
- (A) 200 meters
- (B) Infinitely long
- (C) More than 105.7 metres
- (D) Equal to the height of the hot gas column producing draught
