Fuels and Combustion Prime coking coal is always blended with medium or non- coking coal before ear-bonisation To check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls Because, it alone produces unreactive coke Both A & B Neither A nor B To check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls Because, it alone produces unreactive coke Both A & B Neither A nor B ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Coke oven gas burns with an yellowish flame, because of the presence of NH₃ CH₄ H₂ CO₂ NH₃ CH₄ H₂ CO₂ ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Fusion point of coal ash increases with increase in its __________ content. Iron silicate Lime and magnesia All of these Iron sulphate Iron silicate Lime and magnesia All of these Iron sulphate ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Coal containing large quantity of __________ are difficult to wash. Inherent mineral matter Ash Volatile matter Free impurities Inherent mineral matter Ash Volatile matter Free impurities ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The most matured coal out of the following is Sub-bituminous Lignite Bituminous Semi-anthracite Sub-bituminous Lignite Bituminous Semi-anthracite ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Caking index of a coal is a measure of its Abradability Agglutinating (binding) properties Porosity Reactivity Abradability Agglutinating (binding) properties Porosity Reactivity ANSWER DOWNLOAD EXAMIANS APP
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