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Heat Transfer

Heat Transfer
Prandtl and Reynold's analogies are identical for Prandtl number value of

5
1
0.5

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Heat Transfer
The ratio of the total emissive power to the absorptivity for all bodies is same at ther-mal equilibrium. This is __________ law.

Wien's displacement
Planck's
Kirchoffs
Stefan-Boltzman

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Heat Transfer
Value of Prandtl number for water ranges from

1000 to 2000
L to 2
100 to 500
5 to 10

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Heat Transfer
A sphere of radius 'R₁' is enclosed in a sphere of radius 'R₂'. The view (or shape) factor for radiative heat transfer of the outer sphere with respect to the inner sphere is

1
(R₁/R₂)2
R₂/(R₁+R₂)

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Heat Transfer
A BTU/hr.ft.2 °F is equal to

1 kcal/hr. m².°K
4.88 kcal/hr. m.2°C
None of these
1 kcal/hr. m²°C

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Heat Transfer
Steam condensate is recovered by steam traps and recycled for use as boiler feed water, because of its low

All of these
Suspended solids content
Dissolved soilds content
Hardness

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MORE MCQ ON Heat Transfer

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