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Heat Transfer

Heat Transfer
Grashhoff number is given by

gD2βΔtρ/μ²
gD³βΔtP²/μ
gD³.β.Δtρ²/μ²
gD2βΔtP²μ

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Heat Transfer
In an interphase heat transfer process, the equilibrium state corresponds to equality of temperature in the two phases, while the condition for equilibrium in an interphase mass transfer process is equality of

Activity co-efficients
Mass transfer co-efficients
Chemical potentials
Concentrations

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Heat Transfer
Prandtl number for most of dry gases is about

0.001
70
150
0.72

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Heat Transfer
With increase in the distance between the heat source and the object receiving the heat, the radiation heat transfer

Remains unaffected
Increases
Increases exponentially
Decreases

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Heat Transfer
In a multiple effect evaporator, the effect of boiling point elevation is to

reduce the capacity
reduce the economy
increase the economy
all of the listed here

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Heat Transfer
Thermal conductivity of a conducting solid material depends upon its

None of the listed here
both temperature & porosity
temperature
porosity

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MORE MCQ ON Heat Transfer

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