Fuels and Combustion Spontaneous combustion of coal on storage results due to Inadequate ventilation All of these Low temperature oxidation Storage in large heaps with small surface to volume ratio Inadequate ventilation All of these Low temperature oxidation Storage in large heaps with small surface to volume ratio ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion A coal with high ash content Is harder and stronger Has higher calorific value Is not subjected to washing Has low quantity of mineral matter Is harder and stronger Has higher calorific value Is not subjected to washing Has low quantity of mineral matter ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Producer gas containing least amount of tar is produced by the Atmospheric pressure gasification of coal (e.g., in Kopper-Totzek gasifier) Partial combustion of coal High pressure gasification of coal (e.g. in Lurgi gasifier) Partial combustion of large size (< 50 mm) coke Atmospheric pressure gasification of coal (e.g., in Kopper-Totzek gasifier) Partial combustion of coal High pressure gasification of coal (e.g. in Lurgi gasifier) Partial combustion of large size (< 50 mm) coke ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion High sulphur content in a fuel __________ of the flue gases. Increases the dew point Decreases the dew point Both B & C Reduces the combustion efficiency by limiting the permissible temperature reduction Increases the dew point Decreases the dew point Both B & C Reduces the combustion efficiency by limiting the permissible temperature reduction ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The maximum percentage of CO₂ in a flue gas (from a carbonaceous fuel) can be 21 79 29 77 21 79 29 77 ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Presence of phosphorous in metallurgical coal Increases its caking power Reduces its calorific value Is not undersirable Badly affects the quality of steel Increases its caking power Reduces its calorific value Is not undersirable Badly affects the quality of steel ANSWER DOWNLOAD EXAMIANS APP
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