- (A) Supply of excess fuel
- (B) Supply of excess air
- (C) Burning of carbon monoxide and other incombustibles in upper zone of furnace by supplying more air
- (D) None of these
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- (A) Higher methane content and thus higher calorific value
- (B) Higher carbon monoxide content
- (C) Lower carbon dioxide content
- (D) None of these
- (A) 0.1
- (B) 0.2
- (C) 0.5
- (D) 1.0
- (A) Iron blast furnace
- (B) Cupola in foundries
- (C) Sinter making
- (D) Domestic ovens
- (A) 8
- (B) 14
- (C) 22
- (D) 52
- (A) Lignite
- (B) Bituminous
- (C) Semi-anthracite
- (D) Anthracite
- (A) Emissivity factor is higher
- (B) Sulphur content is lower
- (C) Flue gas has lower dew point thereby facilitating more waste heat recovery
- (D) All
- (A) Smoke
- (B) Temperature
- (C) Oxygen
- (D) Carbon monoxide
- (A) Young
- (B) Mature
- (C) Both A & B
- (D) Neither A nor B
- (A) Increased fuel consumption
- (B) Incomplete combustion
- (C) Smoky flame
- (D) None of these
