Fuels and Combustion

A. Reduced NOx formation in flue gas
B. Lower furnace operating temperature
C. High heat transfer rate
D. All A., B. & C.

A. Minimise its corrosion
B. Avoid radiation heat loss
C. Make it look attractive
D. None of these

A. M40 > 78% and M10 < 10%
B. M40 > 4% and M10 10% and M10 98% and M10 < 2%

A. Non-caking coal
B. Caking coal
C. Coking coal
D. Pulverised coal

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

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