Low temperature oxidation of stored coal results in the________________?

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. Air
B. Oxygen
C. Oxygen enriched air
D. None of these

A. Inadequate ventilation
B. Low temperature oxidation
C. Storage in large heaps with small surface to volume ratio
D. All A., B. and C.

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

A. Lengthens the flame
B. Tends to shorten the flame
C. Does not affect the flame length
D. Increases the flame temperature

A. Sulphur content
B. Calorific value
C. Both A. & B.
D. Neither A. nor B.