Related Questions

A coal having high ratio of volatile matter to fixed carbon as compared to a coal having low ratio of volatile matter to fixed carbon
A Is less liable to spontaneous combustion on storage
B Is more difficult to ignite and produces a shorter flame
C Requires smaller combustion space and less secondary air
D None of these
A coal having high volatile matter content will
A Give less yield of tar and gas on carbonisation
B Burn with a small non-smoky flame
C Have a very high calorific value
D None of these
A coal containing high amount of volatile matter will have
A Low ignition temperature
B Very little ash content
C High fusion point of its ash
D Low adiabatic flame temperature
A coal having higher volatile matter content will necessarily have lower
A Ash fusion temperature
B Calorific value
C Ignition temperature
D Caking index
A coal having higher volatile matter content, has lower
A Smoking tendency on burning
B Coke oven gas yield on carbonisation
C Chance of catching fire during storage in open space
D Ignition temperature
Which of the following type of coal has the lowest proportion of volatile matter ?
A Lignite
B Peat
C Bituminous
D Anthracite
Volatile matter content in coking coal may be about __________ percent.
A 1
B 7
C 22
D 46
Underfeed stokers work best for __________ coals high in volatile matter and with caking tendency
A Anthracite
B Lignite
C Semi-bituminous and bituminous
D All of the above
Calorific value of coal middling generated in coal washeries during washing of coal may be around __________ Kcal/kg.
A 1000
B 4000
C 6000
D 8000
In coal washeries, three products namely the valuable product (i.e. clean/washed coal), discarded product (i.e. mineral matter) and an additional concentrated product called __________ is produced.
A Concentrate
B Tailing
C Middling
D None of these

Next steps