Project ForgeHeat Transfer
Conduction
GATE 2016
Easy
A composite wall has resistance R1=3 K/W in series with [R2=0.25 K/W parallel R3=1 K/W] in series with R4=0.7 K/W. The overall resistance (K/W), rounded to 1 decimal place, is
3.9 K/W(± 0.05 accepted)
Explanation
Parallel combo: (0.25×1)/(0.25+1)=0.2. Total=3+0.2+0.7=3.9 K/W.
Source: GATE CH 2016 (2016)
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