Fuels and Combustion Coke oven gas is a better fuel than blast furnace gas, because of its higher Calorific value, cleanliness and relatively low distribution cost (due to its low specific gravity) All of these Adiabatic flame temperature Heat release rate (thus requiring smaller combustion chamber) Calorific value, cleanliness and relatively low distribution cost (due to its low specific gravity) All of these Adiabatic flame temperature Heat release rate (thus requiring smaller combustion chamber) ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion A carbonaceous fuel (containing no H₂ or hydrocarbons) is burnt and the resulting flue gas contains 21% CO₂. It means that 21% excess air has been used for combustion Complete combustion of fuel has taken place No excess air has been used for combustion 21% excess oxygen has been used for combustion 21% excess air has been used for combustion Complete combustion of fuel has taken place No excess air has been used for combustion 21% excess oxygen has been used for combustion ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Fusion point of coal ash generally varies from 1000 to 1700° C. Ash having fusion point less than __________ °C is liable to form clinker. 1350 1400 1250 1100 1350 1400 1250 1100 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Gasification of the solid fuel converts its organic part into combustible by interaction with air/oxygen and steam so as to obtain a secondary gaseous fuel of high calorific value having no ash. Gasification reactions are normally carried out at about __________ °C. 1400-1500 900-1000 1700-1800 400-500 1400-1500 900-1000 1700-1800 400-500 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion High sulphur content in a fuel __________ of the flue gases. Both B & C Increases the dew point Decreases the dew point Reduces the combustion efficiency by limiting the permissible temperature reduction Both B & C Increases the dew point Decreases the dew point Reduces the combustion efficiency by limiting the permissible temperature reduction ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion __________ prohibits the use of alcohols directly in petrol engines. High cost & availability Low octane number Low calorific value Low flash point High cost & availability Low octane number Low calorific value Low flash point ANSWER DOWNLOAD EXAMIANS APP
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