Question

A composite wall of a furnace has two layers of equal thickness having thermal conductivities in the ratio 2:3. What is the ratio of temperature drop across the two layers?

a.

2:3

b.

3:2

c.

1:2

d.

log e 2 : log e 3

Posted under Heat Transfer

Answer: (b).3:2

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Q. A composite wall of a furnace has two layers of equal thickness having thermal conductivities in the ratio 2:3. What is the ratio of temperature drop across the two layers?

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