1
GATE ME 2007
MCQ (Single Correct Answer)
+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
MCQ (Single Correct Answer)
+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
MCQ (Single Correct Answer)
+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
MCQ (Single Correct Answer)
+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
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