A. More than
B. Less than
C. Equal to
D. Either more or less; depends on the type of fuel
A. MgO & Na2CO3
B. MgSO4 & BaCl2
C. BaSO4 & NaCl
D. MgCO3 & NaCl
A. Decreases the hardness of coke
B. Decreases the abrasion resistance of coke
C. Causes brittleness in steel
D. None of these
A. 500
B. 750
C. 950
D. 1100
A. Facilitates by-products recovery
B. Takes 2-3 days for coking of coal but requires no external fuel for heating
C. Gives larger yield of coke (around 85%) as compared to by-product ovens
D. Produces coke with very poor strength
A. If its ash content is zero
B. If its carbon content is very low
C. If its hydrogen/hydrogen compound content is zero
D. Under no circumstances
A. Hydrogenation
B. Gasification
C. Carbonisation
D. None of these
A. Is friable, charcoal like substance
B. Has highest fixed carbon and lowest volatile matter content of all the four banded components
of coal
C. Is non-coking, but when blended with highly coking coal, controls its swelling and produces
high strength coke on carbonisation
D. All A., B. and C.
A. 71%
C. In between 37 & 71%
D. None of these
A. 30
B. 50
C. 75
D. 95