Fuels and Combustion Presence of free moisture in coal during its high temperature carbonisation Increases the loss of fine coal dust from the ovens when charging Reduces the coking time None of these Protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot oven walls Increases the loss of fine coal dust from the ovens when charging Reduces the coking time None of these Protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot oven walls ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion The maximum adiabatic flame temperature in air as compared to that in pure oxygen is Much lower Same Much higher Either lower or higher, depends on the type of fuel Much lower Same Much higher Either lower or higher, depends on the type of fuel ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Which will have the least volatile matter and hence will be the most difficult to ignite? Semi-bituminous coal Bituminous coal Coke Aanthracite Semi-bituminous coal Bituminous coal Coke Aanthracite ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Bituminous coal Ignites less easily than anthracite Burns with smoky yellow flame Both B and C Is generally coking Ignites less easily than anthracite Burns with smoky yellow flame Both B and C Is generally coking ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion High rate of heating of coke ovens 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 Increases the time of carbonisation May damage its walls due to abrupt excessive swelling of coal ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Low temperature oxidation of coal is accelerated by the Storage in large heaps All of these Storage in compressed piles Absence of porous or friable particles Storage in large heaps All of these Storage in compressed piles Absence of porous or friable particles ANSWER DOWNLOAD EXAMIANS APP
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