Produce smaller coke
Produce stronger coke
Require less time of carbonisation
All of the above
✅ The correct answer is option D.
Fuel and Combustion MCQs
By-products recovery process from coal carbonisation is termed as direct, indirect and semi direct process depending upon the method of recovery of
Tar
Benzol
Ammonia
None of these
✅ The correct answer is option C.
Actual flame temperature is always lower than the adiabatic flame temperature, because there is
No possibility of obtaining complete combustion at high temperature
Always loss of heat from the flame
Both A & B
Neither A nor B
✅ The correct answer is option C.
Which of the following is the maximum coal producing state in India?
Orissa
West Bengal
Jharkhand
Assam
✅ The correct answer is option C.
The maximum adiabatic flame temperature is attained, when the fuel is burnt with
Theoretically required amount of air
More than theoretically required amount of air
Less than theoretically required amount of air
Theoretically required amount of oxygen
✅ The correct answer is option D.
Fixed carbon in coal is defined as
That present in volatile matters
The total quantity of carbon present in the coal
Hundred minus the percentage of volatile matter, ash and moisture
The one which is present in the residue after combustion
✅ The correct answer is option C.
Which of the following fuels has the highest calorific value per unit mass (kcal/kg)?
Coal
Kerosene
Natural gas
Furnace oil
✅ The correct answer is option D.
Which of the following is called “blue gas”?
Coke oven gas
Water gas
Natural gas
Producer gas
✅ The correct answer is option B.
Which of the following has the highest gross calorific value?
Blast furnace gas
Coke oven gas
Carburetted water gas
Oil refinery gas
✅ The correct answer is option D.
Which of the following is not used as a binder in coal briquetting?
Tar
Molasses
Pitch
Line
✅ The correct answer is option D.