Q876
A furnace is made of a refractory brick wall of thickness 0.5 metre and thermal conductivity 0.7 W/m.°K For the same temperature drop and heat loss, this refractory wall can be replaced by a layer of diatomaceous earth of thermal conductivity 0.14 W/m.K and thickness __________ metre.
A.
0.01
B.
0.1
AnswerC.
0.25
D.
0.5
Answer: Option B
Solution
Answer: Option B
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