Fuels and Combustion

A. Thickness of plastic layer
B. Caking index
C. Swelling index
D. Gray-king index

A. Tar
B. Benzol
C. Ammonia
D. None of these

A. Storage in large heaps
B. Storage in compressed piles
C. Absence of porous or friable particles
D. All A., B. and C.

A. Decreases
B. Increases
C. Remain same
D. May increase or decrease depending on the type of fuel

A. The gaseous fuel before combustion decreases
B. Combustion air decreases
C. Either the fuel or the air or both, increases
D. Either the fuel or the air does not affect

A. Hydrogen
B. Methane
C. Unsaturated hydrocarbons
D. All A., B. and C.

A. O2
B. CO
C. N2
D. SO2

A. Transportation and handling
B. Washing
C. Pulverisation
D. Storage

A. Are soft & friable (poor strength and size stability)
B. Require longer time of carbonisation as ash offers resistance to heat transfer
C. Produce larger quantity of coke oven gas
D. None of these

A. Humidity of combustion air
B. Moisture content of fuel
C. Both A. and B.
D. The water formed by combustion reaction