Caking
Pulverised
Non-caking
High ash
✅ The correct answer is option C.
Fuel and Combustion MCQs
Which of the following constituents of coal is the most important in the production of coke?
Moisture
Ash
Volatiles
Carbon
✅ The correct answer is option D.
Fossil fuels mean
Solid fuels
Liquid fuels
Those fuels which are found in the crust of earth
Premature fuels with low calorific value
✅ The correct answer is option C.
Coke having higher porosity has
Lower bulk density
Lower strength
Higher reactivity
All of the above
✅ The correct answer is option D.
Overfire burning in a furnace is a phenomenon characterised by the
Supply of excess fuel
Supply of excess air
Burning of carbon monoxide and other incombustibles in upper zone of furnace by supplying more air
None of these
✅ The correct answer is option C.
Pick the odd man out.
Briquettes
Wood
Oil gas
Pitch creosote mixture
✅ The correct answer is option B.
A coal having high volatile matter content will
Give less yield of tar and gas on carbonisation
Burn with a small non-smoky flame
Have a very high calorific value
None of these
✅ The correct answer is option D.
Short/intense flame is produced during combustion of gaseous fuel by using
High amount/current of combustion air
Low amount/current of combustion air
Preheated secondary air
Very little excess air
✅ The correct answer is option A.
Caking coal is desirable for
Burning on travelling grate
Coke making
Burning on firebars
All of the above
✅ The correct answer is option B.
Which of the following is not a micro component present in coal?
Micrinite
Clarain
Fusinite
Liptinite
✅ The correct answer is option B.