1
GATE ME 2007
+2
-0.6
Consider steady one-dimensional heat flow in a plate of $$20mm$$ thickness with a uniform heat generation of $$80MW/{m^3}.$$ The left and right faces are kept at constant temperatures of $${160^0}C$$ and $${120^0}C$$ respectively. The plate has a constant thermal conductivity of $$200W/mK.$$

The location of maximum temp within the plate from left face is

A
$$15mm$$
B
$$10mm$$
C
$$5mm$$
D
$$0mm$$
2
GATE ME 2007
+2
-0.6
Consider steady one-dimensional heat flow in a plate of $$20mm$$ thickness with a uniform heat generation of $$80MW/{m^3}.$$ The left and right faces are kept at constant temperatures of $${160^0}C$$ and $${120^0}C$$ respectively. The plate has a constant thermal conductivity of $$200W/mK.$$

The minimum temp within the plate in degree $$C$$ is

A
$$160$$
B
$$165$$
C
$$175$$
D
$$250$$
3
GATE ME 2007
+2
-0.6
Building has to be maintained at $${21^ \circ }C$$ (dry bulb) and $${14.5^ \circ }C$$ (wet bulb). The dew point temp under these conditions is $${10.17^0}C$$. The outside temp is $$- {23^0}C$$ (dry bulb) and internal and external surface heat transfer coefficients are $$8\,\,W/{m^2}K$$ and $$23$$ $$W/{m^2}K$$ respectively. If the building wall has a thermal conductivity of $$1.2$$ $$W/mK,$$ the minimum thickness (m) of wall required to prevent condensation is
A
$$0.471$$
B
$$0.407$$
C
$$0.321$$
D
$$0.125$$
4
GATE ME 2006
+2
-0.6
With an increase in the thickness of insulation around a circular pipe, heat loss to surroundings due to
A
Convection increases, while that due to conduction decreases
B
Convection decreases, while that due to conduction increases
C
Convection and conduction decreases
D
Convection and conduction increases
GATE ME Subjects
Engineering Mechanics
Machine Design
Strength of Materials
Heat Transfer
Production Engineering
Industrial Engineering
Turbo Machinery
Theory of Machines
Engineering Mathematics
Fluid Mechanics
Thermodynamics
General Aptitude
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