Related Questions

Caking index of a coal is a measure of its
A Abradability
B Reactivity
C Agglutinating (binding) properties
D Porosity
Caking coal is desirable for
A Burning on travelling grate
B Coke making
C Burning on firebars
D All of the above
Caking index of the coal blend used for the manufacture of metallurgical coke should be around
A 5
B 21
C 40
D 48
Caking index of coal blend used for blast furnace coke making is about
A 8
B 12
C 22
D 36
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
Which of the following petrological constitutes is responsible for bright and lustrous black band of bituminous coal?
A Vitrain
B Clarain
C Durain
D Fussain
Calorific value of bituminous coal may be around __________ Kcal/kg.
A 500
B 1500
C 6500
D 20000
Bituminous coal
A Ignites less easily than anthracite
B Is generally coking
C Burns with smoky yellow flame
D Both B and C
Safe condition for storage of high V.M. bituminous coal is that
A [

A. Height of the coal heap should be

B. Maximum 200 tons should be stored in a heap

B Both A and B
C Neither A nor B
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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