Related Questions

Caking index of coal blend used for blast furnace coke making is about
A 8
B 12
C 22
D 36
Two types of tea, Sreemangal Red costing Tk. 50 per kg and Sreemangal Black costing Tk. 70 per kg, are mixed together to form a new blend of tea. If the new blend costs Tk. 58 per kg, how much of Sreemangal Red is required to make 10 kgs of the new blend?
A 6
B 5
C 7
D 4
Quantity of coke produced from metallurgical coal may be around __________ percent.
A 30
B 50
C 75
D 95
Higher percentage of ash in coal meant for the production of metallurgical grade coke
A Decreases the hardness of coke
B Decreases the abrasion resistance of coke
C Causes brittleness in steel
D None of these
Caking index of a coal is a measure of its
A Abradability
B Reactivity
C Agglutinating (binding) properties
D Porosity
Volatile matter content of metallurgical coke may be around __________ percent.
A 1-2
B 10-15
C 22-26
D 30-33
Degree of carbonisation of coal during coke making can be roughly judged by the __________ of the coke produced.
A Colour
B Moisture content
C Ash content
D Volatile matter
During coal carbonisation process, the conversion of semi-coke to coke is accompanied by an increase in the __________ of the mass.
A Density
B Porosity
C Electrical resistivity
D None of these
A good metallurgical coke should have very low
A Sulphur & phosphorous content
B Porosity
C Fusion point of its ash
D Hardness & strength
The bituminous coal is no caking if its carbon content is
A 78-81%
B 81-85%
C 85-90%
D 90-95%

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