Fuels and Combustion The optimum percentage of excess air for combustion depends upon the __________ of the fuel. Type (solid, liquid or gaseous) Ignition temperature Calorific value Sulphur content Type (solid, liquid or gaseous) Ignition temperature Calorific value Sulphur content ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Calorific value of gobar gas (containing CH₄ = 60% , H₂ = 10% ; CO₂ = 30%) may be about __________ Kcal/Nm³. 5400 1800 10200 3200 5400 1800 10200 3200 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Anthracite can be used for Recarbonising steel Making carbon electrodes Blending with highly coking coal to check its swelling which helps in saving coke even walls from damage and to produce high strength coke All of these Recarbonising steel Making carbon electrodes Blending with highly coking coal to check its swelling which helps in saving coke even walls from damage and to produce high strength coke All of these ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Air/gas ratio for complete combustion will be the highest for LPG Coke oven gas Gobar gas Carburetted water gas LPG Coke oven gas Gobar gas Carburetted water gas ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Bituminous coal Ignites less easily than anthracite Is generally coking Both B and C Burns with smoky yellow flame Ignites less easily than anthracite Is generally coking Both B and C Burns with smoky yellow flame ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The weathering index of a coal Is related to its calorific value Is a measure of its caking tendency Gives an idea of the fusion temperature of ash Is a measure of its size stability, when stored & exposed to weather Is related to its calorific value Is a measure of its caking tendency Gives an idea of the fusion temperature of ash Is a measure of its size stability, when stored & exposed to weather ANSWER DOWNLOAD EXAMIANS APP
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