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 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
Volatile matter content in coking coal may be about __________ percent.
A 1
B 7
C 22
D 46
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
Which of the following type of coal has the lowest proportion of volatile matter ?
A Lignite
B Peat
C Bituminous
D Anthracite
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
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
Volatile matter content of metallurgical coke may be around __________ percent.
A 1-2
B 10-15
C 22-26
D 30-33
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

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