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Heat and Mass Transfer

Heat and Mass Transfer
Which of the following has least value of conductivity?

Plastic
Glass
Water
Air

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Heat and Mass Transfer
The emissivity for a black body is

0.75
0.5
1

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Heat and Mass Transfer
Sensible heat factor is given by (where S.H. = Sensible heat, and L.H. = Latent heat)

S.H/(S.H + L.H)
(L.H - S.H)/S.H
(S.H + L.H) /S.H
S.H/(L.H - S.H)

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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

Forced convection
Radiation
Free convection
Conduction

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Heat and Mass Transfer
When heat is transferred from hot body to cold body, in a straight line, without affecting the intervening medium, it is referred as heat transfer by

Conduction
Conduction and convection
Radiation
Convection

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Heat and Mass Transfer
Radiation is the process of heat transfer in which heat flows from a ________, in a straight line, without affecting the intervening medium.

Larger body to smaller body
Cold body to hot body
Hot body to cold body
Smaller body to larger body

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