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Heat and Mass Transfer

Heat and Mass Transfer
The radiation emitted by a black body is known as

Black radiation
Full radiation
All of these
Total radiation

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Heat and Mass Transfer
In free convection heat transfer transition from laminar to turbulent flow is governed by the critical value of the

Prandtl number, Grashoff's number
Reynold's number, Grashoff's number
Reynold's number
Grashoff's number

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Heat and Mass Transfer
The process of heat transfer from one particle of the fluid to another by the actual movement of the fluid particles due to difference of density caused by temperature of the particle is known as

Free convection
Forced convection
Conduction
Radiation

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Heat and Mass Transfer
Depending on the radiating properties, body will be transparent when (Where a = absorptivity, p = reflectivity, x = transmissivity)

P=1, x = 0, and a = 0
X = 0, a + p = 1
P = 0, x= 1, and a = 0
P = 0, x = 0 and a = 1

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Heat and Mass Transfer
The emissive power of a body depends upon its

All of these
Physical nature
Temperature
Wave length

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Heat and Mass Transfer
The value of Prandtl number for air is about

0.1
1.7
0.3
0.7

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MORE MCQ ON Heat and Mass Transfer

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