Fuels and Combustion Blast furnace gas burns with a bluish flame, because of the presence of CO S CH₄ CO₂ CO S CH₄ CO₂ ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Fuel gases containing hydrocarbons (ie.g. coke oven gas) are not preheated before burning, mainly because The hydrocarbons crack thereby choking and fouling the heat transfer surface by carbon soot It reduces its flame temperature tremendously It reduces its calorific value tremendously There are chances of explosion during preheating The hydrocarbons crack thereby choking and fouling the heat transfer surface by carbon soot It reduces its flame temperature tremendously It reduces its calorific value tremendously There are chances of explosion during preheating ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Fusion point of coal ash increases with increase in its __________ content. Iron silicate Lime and magnesia Iron sulphate All of these Iron silicate Lime and magnesia Iron sulphate All of these ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Coal is pulverised before burning in large capacity boiler furnaces mainly to Facilitate easy ash removal Provide trouble free operation Ensure its complete combustion Enhance its calorific value Facilitate easy ash removal Provide trouble free operation Ensure its complete combustion Enhance its calorific value ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion To avoid fire by spontaneous combustion of coal due to its low temperature oxidation, it should be stored in Fine sizes without the presence of any lump Shallow and small piles Large heaps with small surface to volume ratio Closed space without any ventilation facility Fine sizes without the presence of any lump Shallow and small piles Large heaps with small surface to volume ratio Closed space without any ventilation facility ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Calorific value of coal middling generated in coal washeries during washing of coal may be around __________ Kcal/kg. 4000 8000 1000 6000 4000 8000 1000 6000 ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS