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GATE2017 ME-2: 18
Arjun
asked
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Heat Transfer
Feb 27, 2017
recategorized
Mar 5, 2021
by
Lakshman Patel RJIT
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The heat loss from a fin is $6$ W. The effectiveness and efficiency of the fin are $3$ and $0.75$, respectively. The heat loss (in W) from the fin, keeping the entire fin surface at base temperature, is _______.
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numerical-answers
fluid-mechanics-and-thermal-science
heat-transfer
Arjun
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Heat Transfer
Feb 27, 2017
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Mar 5, 2021
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Lakshman Patel RJIT
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Answer:
7.9 : 8.1
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A metal ball of diameter $60$ mm is initially at $220^{\circ}$ C. The ball is suddenly cooled by an air jet of $20^{\circ}$ C. The heat transfer coefficient is $200 W/m^{2}.K$ ... $^{\circ} C$) after $90$ seconds will be approximately $141$ $163$ $189$ $210$
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GATE2017 ME-1: 38
Heat is generated uniformly in a long solid cylindrical rod (diameter$=10$ mm) at the rate of $4 \times 10^{7} W/m^{3}$. The thermal conductivity of the rod material is $25 W/m.K$. Under steady state conditions, the temperature difference between the centre and the surface of the rod is ______ $^{\circ} C$.
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27.4k
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