Fuels and Combustion

A. No possibility of obtaining complete combustion at high temperature
B. Always loss of heat from the flame
C. Both A. and B.
D. Neither A. nor B.

A. Plutonium
B. Uranium
C. Radium
D. Neptunium

A. Decreases
B. Increases
C. Remain constant
D. May increase or decrease, depends on combustibles

A. 1-2
B. 10-15
C. 22-26
D. 30-33

A. Lignites
B. Bituminous coals
C. Semi-anthracites
D. Anthracites

A. High rank coals have higher amount of volatile matter
B. Ratio of fixed carbon to volatile matter increases
C. Oxygen content progressively decreases
D. Calorific value of the coal increases

A. 2
B. 4
C. 6
D. 1

A. 1500
B. 3300
C. 5400
D. 8500

A. Much lower
B. Much higher
C. Same
D. Either lower or higher, depends on the type of fuel

A. 1
B. 5
C. 50
D. 100