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 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
A coal having high amount of volatile matter
A Would require smaller combustion chamber
B Produces very little of tar and gas on carbonisation
C Ignites easily and burns with long smoky flame
D All of the above
Volatile matter content in coking coal may be about __________ percent.
A 1
B 7
C 22
D 46
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
Mineral matter content (M) and ash content (A) in coal are approximately related as
A M = 1.1A
B M = A
C M = 1.5A
D M = 2A
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 of metallurgical coke may be around __________ percent.
A 1-2
B 10-15
C 22-26
D 30-33
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

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