Related Questions

Quantity of coke produced from metallurgical coal may be around __________ percent.
A 30
B 50
C 75
D 95
Caking index of the coal blend used for the manufacture of metallurgical coke should be around
A 5
B 21
C 40
D 48
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 tea merchant blends 2 kinds of tea, putting in 3 parts of a Tk. 25 per kg grade to 1 part of a Tk. 15 per kg. If the mixture is changed to 1 part of the Tk. 25 per kg grade to 3 parts of the less expensive grade, how much will the shop lose or save in blending 200 kg?
A lose Tk. 500
B loss Tk. 1,000
C save Tk. 1,500
D save Tk. 1,000
Which of the following coke has the least percentage of ash?
A Petroleum coke
B Beehive coke
C Foundary coke
D Metallurgical coke
Volatile matter content of metallurgical coke may be around __________ percent.
A 1-2
B 10-15
C 22-26
D 30-33
A good metallurgical coke
A Should have high porosity
B Should be brittle
C Must contain moderate quantities of ash, moisture, sulphur and volatile matters
D Should have low fusion point of its ash
A good metallurgical coke should have very low
A Sulphur & phosphorous content
B Porosity
C Fusion point of its ash
D Hardness & strength
Ash content in the middling coal (a byproduct of coal washeries) in India ranges between __________ percent.
A 15 to 25
B 35 to 45
C 55 to 75
D 75

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