A. More than
B. Less than
C. Equal to
D. Either more or less; depends on the type of fuel
Ignition temperature of a fuel in air is ______________ that in pure oxygen? Read More »
Fuels and Combustion 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
Beehive coke oven________________? Read More »
Fuels and Combustion 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
Gross and net calorific value of a fuel will be the same__________________? Read More »
Fuels and Combustion 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.
Fussain _____________________? Read More »
Fuels and Combustion A. 71%
C. In between 37 & 71%
D. None of these
A. 30
B. 50
C. 75
D. 95
Quantity of coke produced from metallurgical coal may be around _____________ percent? Read More »
Fuels and Combustion