A. 20
B. 40
C. 65
D. 80
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
A. Supply of excess fuel
B. Supply of excess air
C. Burning carbon monoxide and other incombustible in upper zone of furnace by supplying
more air
D. None of these
A. Blast furnace
B. Steam boiler
C. Salt bath furnace
D. Annealing furnace
A. Waste heat recovery from flue gas
B. Minimising heat losses from furnace walls
C. Maintaining proper draught
D. All A., B. and C.
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
A. Reheating furnace
B. Reverberatory furnace
C. Rotary kilns
D. Boiler furnace