The variation of thermal conductivity of a metal with temperature is often correlated using an expression of the form K = K₀ + at. where, K is the thermal conductivity and T is the temperature (in °K). The units of 'a' in SI system will be

Heat Transfer
The variation of thermal conductivity of a metal with temperature is often correlated using an expression of the form K = K₀ + at. where, K is the thermal conductivity and T is the temperature (in °K). The units of 'a' in SI system will be

W/m

None, A is just a number

W/m.k

W/m.k²

W/m

None, A is just a number

W/m.k

W/m.k²

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Heat Transfer
In natural convection heat transfer, the correlating parameter is the

Grashoff number

Graetz number

Bond number

Eckert number

Grashoff number

Graetz number

Bond number

Eckert number

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Heat Transfer
In Biot number, the characteristic length used is the ratio of the __________ of the solid.

Surface area to volume

Surface area to perimeter

Perimeter to surface area

Volume to surface area

Surface area to volume

Surface area to perimeter

Perimeter to surface area

Volume to surface area

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Heat Transfer
The characteristic dimensionless groups for heat transfer to a fluid flowing through a pipe in laminar flow are

Nu, Gz

Re.Gz

Nu, Pr, Re

Nu, Pr

Nu, Gz

Re.Gz

Nu, Pr, Re

Nu, Pr

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Heat Transfer
For a perfectly transparent surface (like gases), the

Absorptivity = 0

Transmissivity = 1

All of these

Reflectivity = 0

Absorptivity = 0

Transmissivity = 1

All of these

Reflectivity = 0

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Heat Transfer
If Prandtl number is greater than the Schmidt number, then the

none of the listed here

concentration boundary layer lies inside the thermal boundary layer

thermal boundary layer lies inside the concentration boundary layer

thermal & concentration boundary layers are of equal thickness

none of the listed here

concentration boundary layer lies inside the thermal boundary layer

thermal boundary layer lies inside the concentration boundary layer

thermal & concentration boundary layers are of equal thickness

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Heat Transfer

Heat Transfer The variation of thermal conductivity of a metal with temperature is often correlated using an expression of the form K = K₀ + at. where, K is the thermal conductivity and T is the temperature (in °K). The units of 'a' in SI system will be

Heat Transfer In natural convection heat transfer, the correlating parameter is the

Heat Transfer In Biot number, the characteristic length used is the ratio of the __________ of the solid.

Heat Transfer The characteristic dimensionless groups for heat transfer to a fluid flowing through a pipe in laminar flow are

Heat Transfer For a perfectly transparent surface (like gases), the

Heat Transfer If Prandtl number is greater than the Schmidt number, then the

Heat Transfer
The variation of thermal conductivity of a metal with temperature is often correlated using an expression of the form K = K₀ + at. where, K is the thermal conductivity and T is the temperature (in °K). The units of 'a' in SI system will be

Heat Transfer
In natural convection heat transfer, the correlating parameter is the

Heat Transfer
In Biot number, the characteristic length used is the ratio of the __________ of the solid.

Heat Transfer
The characteristic dimensionless groups for heat transfer to a fluid flowing through a pipe in laminar flow are

Heat Transfer
For a perfectly transparent surface (like gases), the

Heat Transfer
If Prandtl number is greater than the Schmidt number, then the