Fuels and Combustion Low temperature oxidation of stored coal results in the All of these Decrease in its carbon & hydrogen content Decrease in its caking power & calorific value Increase in its oxygen content All of these Decrease in its carbon & hydrogen content Decrease in its caking power & calorific value Increase in its oxygen content ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following accentuates clinker-ing trouble on furnace grate burning coal? Low forced draught and fuel bed temperature Low reactivity of carbonised residue containing high proportions of iron & sulphur All of these Thick fire bed and preheated primary air Low forced draught and fuel bed temperature Low reactivity of carbonised residue containing high proportions of iron & sulphur All of these Thick fire bed and preheated primary air ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following is used for making the explosive 'TNT'? Toluene Cerosote Pyridine Benzol Toluene Cerosote Pyridine Benzol ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which of the following would require maximum amount of % excess air for complete combustion? Furnace oil Pulverised coal Lump coal (fixed on chain grate) Coke oven gas Furnace oil Pulverised coal Lump coal (fixed on chain grate) Coke oven gas ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Fuel gases containing hydrocarbons (ie.g. coke oven gas) are not preheated before burning, mainly because It reduces its flame temperature tremendously It reduces its calorific value tremendously The hydrocarbons crack thereby choking and fouling the heat transfer surface by carbon soot There are chances of explosion during preheating It reduces its flame temperature tremendously It reduces its calorific value tremendously The hydrocarbons crack thereby choking and fouling the heat transfer surface by carbon soot There are chances of explosion during preheating ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion High excess air in combustion of fuels results in Smoky flame Incomplete combustion Increased fuel consumption None of these Smoky flame Incomplete combustion Increased fuel consumption None of these ANSWER DOWNLOAD EXAMIANS APP
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