Fuels and Combustion

A. Height of the coal heap should be < 3 metres
B. Maximum 200 tons should be stored in a heap
C. Both A. and B.
D. Neither A. nor B.

A. Forced draft fan
B. Induced draft fan
C. Steam ejector
D. Natural draft

A. M = 1.8 A
B. M = 0.5 A
C. M = 1.1 A
D. M = A

A. 5
B. 50
C. 500
D. 5000

A. Develops a non-luminous flame
B. Develops a low temperature flame
C. Can be done with less excess air
D. Provides a lower rate of heat release

A. Density
B. Porosity
C. Electrical resistivity
D. None of these

A. Pitch and creosote oil
B. Light oil and pitch
C. Anthracene and crecosote oil
D. Solar oil and pitch

A. Prevention of clinker formation in the oven
B. Controlling the dust nuisance while charging the coal
C. Reducing the cracking of hydrocarbons in the gas and increasing the percentage of CO &
H2 in the gas (due to the endothermic reaction represented by C + H2O = CO + H2)
D. All A., B. and C.

A. CO2, O2, CO
B. CO, O2, CO2
C. CO2, CO, O2
D. O2, CO2, CO

A. Caking index
B. Yield of carbonised products
C. Friability & oxygen content
D. Calorific value