GATE ME · 2021 · ME
Question 43: Heat-Transfer
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Question 43
MENAT2 marksNeeds review
An uninsulated cylindrical wire of radius 1.0 mm produces electric heating at the rate of 5.0 W/m. The temperature of the surface of the wire is 75 °C when placed in air at 25 °C. When the wire is coated with PVC of thickness 1.0 mm, the temperature of the surface of the wire reduces to 55 °C. Assume that the heat generation rate from the wire and the convective heat transfer coefficient are same for both uninsulated wire and the coated wire. The thermal conductivity of PVC is ______ W/m.K (round off to two decimal places).
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2021ME
GATE ME 2021 · Paper 1
Mechanical Engineering · Original paper archive
- Section
- Mechanical Engineering
- Question type
- Numerical answer (NAT)
- Marks
- 2 marks
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