Fuels and Combustion 'Fat' coal means a coal having High volatile matter Low ash content Non smoking tendency Low calorific value High volatile matter Low ash content Non smoking tendency Low calorific value ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Naphthalene is removed from coke oven gas by Adsorbing on bog iron bed Absorbing in vetro-coke solution Scrubbing with wash oil (a petroleum product) None of these Adsorbing on bog iron bed Absorbing in vetro-coke solution Scrubbing with wash oil (a petroleum product) None of these ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion High amount of sulphur and phosphorous in coke causes Brittleness of steel made by using it None of these Decrease in its calorific value Increase in its strength Brittleness of steel made by using it None of these Decrease in its calorific value Increase in its strength ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion During the carbonisation of coal All of these All tar is evolved at < 600°C Evolution of H₂ and formation of methane and aromatics occur at > 700°C Hard semi-coke starts shrinking at 600°C All of these All tar is evolved at < 600°C Evolution of H₂ and formation of methane and aromatics occur at > 700°C Hard semi-coke starts shrinking at 600°C 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) High pressure gasification of coal (e.g. in Lurgi gasifier) Partial combustion of coal Partial combustion of large size (< 50 mm) coke Atmospheric pressure gasification of coal (e.g., in Kopper-Totzek gasifier) High pressure gasification of coal (e.g. in Lurgi gasifier) Partial combustion of coal Partial combustion of large size (< 50 mm) coke ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion With increase in calorific value of fuels, their adiabatic flame temperatures Remain unchanged Increase Decrease May increase or decrease ; depends on the quantity of products of combustion Remain unchanged Increase Decrease May increase or decrease ; depends on the quantity of products of combustion ANSWER DOWNLOAD EXAMIANS APP
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