- (A) Permits the use of high ash content coal
- (B) Permits the use of low fusion point ash coal
- (C) Accelerates the burning rate and economises on fuel combustion
- (D) All
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- (A) Junker’s
- (B) Bomb
- (C) Boy’s
- (D) None of these
- (A) Lignite
- (B) Semi-anthracite
- (C) Sub-bituminous
- (D) Bituminous
- (A) Fixed carbon and having a heat value of 13, 200 BTU/1b
- (B) Ash and a heating value of 13, 200 BTU/1b
- (C) Fixed carbon and a heating value of 132 BTU/1b
- (D) None of these
- (A) Volatile matter content increases
- (B) Carbon content decreases
- (C) Moisture content increases
- (D) Ash content increases
- (A) Sulphur & phosphorous content
- (B) Porosity
- (C) Fusion point of its ash
- (D) Hardness & strength
- (A) Reduces its sulphur and ash content
- (B) Controls its ash fusibility and increases its calorific value
- (C) Improves its coking properties
- (D) All
- (A) Recarbonising steel
- (B) Making carbon electrodes
- (C) Blending with highly coking coal to check its swelling which helps in saving coke even walls from damage and to produce high strength coke
- (D) All
- (A) 5
- (B) 25
- (C) 55
- (D) 75
- (A) Flue gases
- (B) Ash content in the fuel
- (C) Incomplete combustion
- (D) Unburnt carbon in flue gases
