1
GATE ME 2024
Numerical
+2
-0

Consider a hemispherical furnace of diameter $ D = 6 \text{ m} $ with a flat base. The dome of the furnace has an emissivity of 0.7 and the flat base is a blackbody. The base and the dome are maintained at uniform temperature of 300 K and 1200 K, respectively. Under steady state conditions, the rate of radiation heat transfer from the dome to the base is _______ kW (rounded off to the nearest integer).

Use Stefan-Boltzmann constant = $5.67 \times 10^{-8} \text{ W/(m}^2 \text{ K}^4 \text{)}$

GATE ME 2024 Heat Transfer - Radiation Question 6 English

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2
GATE ME 2023
MCQ (Single Correct Answer)
+2
-0.66
A cylindrical rod of length β„Ž and diameter 𝑑 is placed inside a cubic enclosure of side length 𝐿. 𝑆 denotes the inner surface of the cube.

The view-factor FS-S is 
A
0
B
1
C
$\rm \frac{(\pi dh+\pi d^2/2)}{6L^2}$
D
$\rm1-\frac{(\pi dh+\pi d^2/2)}{6L^2}$
3
GATE ME 2017 Set 1
Numerical
+2
-0
Two black surfaces, $$AB$$ and $$BC,$$ of lengths $$5m$$ and $$6m,$$ respectively, are oriented as shown. Both surfaces extend infinitely into the third dimension. Given that view factor $${F_{12}} = 0.5,\,\,{T_1} = 800\,\,K,\,\,{T_2} = 600\,\,K,$$ $${T_{surrounding}} = 300\,\,K$$ and Stefan Boltzmann constant, $$\sigma = 5.67 \times {10^{ - 8}}\,\,W/\left( {{m^2}{K^4}} \right),$$ the heat transfer rate from Surface $$2$$ to the surrounding environment is ____________ $$kW.$$ GATE ME 2017 Set 1 Heat Transfer - Radiation Question 12 English
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4
GATE ME 2016 Set 1
Numerical
+2
-0
An infinitely long furnace of $$0.5m \times 0.4m$$ cross-section is shown in the figure below. Consider all surfaces of the furnace to be black. The top and bottom walls are maintained at temperature $${T_1} = {T_3} = {927^ \circ }C,$$
while the side walls are at temperature $${T_2} = {T_4} = {527^ \circ }C.$$
The view factor, $${F_{1 - 2}}$$ is $$0.26.$$ The net radiation heat loss or gain on side $$1$$ is_________ $$W/m.$$ Stefan-Boltzman constant $$ = \,5.67 \times {10^{ - 8}}$$ $$W/{m^2}$$-$${K^4}$$ GATE ME 2016 Set 1 Heat Transfer - Radiation Question 14 English
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GATE ME Subjects
Turbo Machinery
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