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Reported Question / Answer
Q.) Thermal efficiency of furnaces can be improved by
1)
minimising heat losses from furnace walls.
2)
waste heat recovery from flue gas.
3)
all (, ( and (.
4)
maintaining proper draught.
5)
NULL
Answer :
3
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Message / Correct Answer / Suggestion
Human Verification : Answer 2 + 3 = ?
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