Category: Fuels and Combustion

A. 2000
B. 600
C. 1100
D. 1600

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. Reduces its sulphur and ash content
B. Controls its ash fusibility and increases its calorific value
C. Improves its coking properties
D. All A., B. and C.

A. Decrease in its calorific value
B. Increase in its strength
C. Brittleness of steel made by using it
D. None of these

A. Yield of coke oven gas is 290 Nm3 /ton dry coal
B. Volatile matter in coke is zero
C. Temperature maintained is 700°C
D. Yield of tar is about 3% of dry coal

A. Increase
B. Decrease
C. Remain unchanged
D. May increase or decrease; depends on the quantity of products of combustion

A. Coal tar
B. Bitumen
C. Molasses
D. None of these

A. High production of CO2
B. Low production of CO2
C. High production of CO
D. Both B. and C.

A. CH4 & CO2
B. CO & CO2
C. CH4 & N2
D. CO & N2

A. Gaseous
B. Solid
C. Liquid
D. Both B. and C.