Fuels and Combustion Short/intense flame is produced during combustion of gaseous fuel by using High amount/current of combustion air Very little excess air Low amount/current of combustion air Preheated secondary air High amount/current of combustion air Very little excess air Low amount/current of combustion air Preheated secondary air ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The optimum percentage of excess air for combustion depends upon the __________ of the fuel. Ignition temperature Sulphur content Type (solid, liquid or gaseous) Calorific value Ignition temperature Sulphur content Type (solid, liquid or gaseous) Calorific value ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Caking index of the coal blend used for the manufacture of metallurgical coke should be around 40 48 5 21 40 48 5 21 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following is not a manufactured fuel ? Semi-coke Furnace oil Kerosene Bagasse Semi-coke Furnace oil Kerosene Bagasse ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Spontaneous combustion of coal on storage results due to Storage in large heaps with small surface to volume ratio All of these Low temperature oxidation Inadequate ventilation Storage in large heaps with small surface to volume ratio All of these Low temperature oxidation Inadequate ventilation ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion High rate of heating of coke ovens Increases the time of carbonisation May damage its walls due to abrupt excessive swelling of coal None of these Produces larger size coke Increases the time of carbonisation May damage its walls due to abrupt excessive swelling of coal None of these Produces larger size coke ANSWER DOWNLOAD EXAMIANS APP
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