A cold storage chamber is constructed with 10 mm mortar, 200 mm brick, 100 mm i

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A cold storage chamber is constructed with 10 mm mortar, 200 mm brick, 100 mm insulation and 5 mm wood-board having thermal conductivities of 0.8, 1.5, 0.025 and 0.2 W m-1 K-1, respectively. The resistance of 4 K m-1 W-1 is offered by

Options:

A . mortar

B . brick

C . insulation

D . wood-board

Answer: Option C

-NA-

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