Fuels and Combustion Presence of free moisture in coal during its high temperature carbonisation None of these Increases the loss of fine coal dust from the ovens when charging Protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot oven walls Reduces the coking time None of these Increases the loss of fine coal dust from the ovens when charging Protects the volatile products from pyrolysis (cracking) in the presence of hot coke and hot oven walls Reduces the coking time ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Critical Air Blast (CAB) value of coke is a direct measure of its Reactivity Strength None of these Hardness Reactivity Strength None of these Hardness ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion During combustion of a gaseous fuel, the presence of a non-luminous flame is an indication of the None of these High oxygen in flue gas Complete combustion Incomplete combustion None of these High oxygen in flue gas Complete combustion Incomplete combustion ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Presence of free moisture in coal is most disadvantageous during Its pulverisation (as it requires more power) None of these Handling (e.g. when emptying wagons) Combustion of fire slacks on the grates Its pulverisation (as it requires more power) None of these Handling (e.g. when emptying wagons) Combustion of fire slacks on the grates ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion Froth floatation is used for All of these Washing fine coal dust (< 0.5 mm size) Washing lump coal (> 80 mm size) Removing ash from the coal based on difference in specific gravity of coal and ash All of these Washing fine coal dust (< 0.5 mm size) Washing lump coal (> 80 mm size) Removing ash from the coal based on difference in specific gravity of coal and ash ANSWER DOWNLOAD EXAMIANS APP
Fuels and Combustion For long flame and easy ignition, the coal used should have Low ash High volatile matter High calorific value High ash Low ash High volatile matter High calorific value High ash ANSWER DOWNLOAD EXAMIANS APP
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