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

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

R₂/(R₁+R₂)

1

(R₁/R₂)2

R₂/(R₁+R₂)

1

(R₁/R₂)2

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Heat Transfer
Condensing film co-efficient for steam on horizontal tubes ranges from 5000 to 15000 Kcal/hr.m² .°C. Condensation of vapor is carried out inside the tube in a shell and tube heat exchanger, when the

Higher condensing film co-efficient is desired

Lower pressure drop through the exchanger is desired

Condensate is corrosive in nature

Temperature of the incoming vapor is very high

Higher condensing film co-efficient is desired

Lower pressure drop through the exchanger is desired

Condensate is corrosive in nature

Temperature of the incoming vapor is very high

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Heat Transfer
Overall thermal resistance for conductive heat transfer through a series of flat resistances is equal to the

Average of all resistances

Maximum resistance in the series

Minimum resistance presents in the series

Sum of all resistances

Average of all resistances

Maximum resistance in the series

Minimum resistance presents in the series

Sum of all resistances

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Heat Transfer
Which of the following is directly concerned with the heat transfer?

Grashoff number

Euler number

Strouhal number

Sherwood number

Grashoff number

Euler number

Strouhal number

Sherwood number

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

1

5

0.5

1

5

0.5

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Heat Transfer
Prandtl number is the ratio of

Momentum diffusivity to mass diffusivity

Thermal diffusivity to momentum diffusivity

Thermal diffusivity to mass diffusivity

Momentum diffusivity to thermal diffusivity

Momentum diffusivity to mass diffusivity

Thermal diffusivity to momentum diffusivity

Thermal diffusivity to mass diffusivity

Momentum diffusivity to thermal diffusivity

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Heat Transfer

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

Heat Transfer Condensing film co-efficient for steam on horizontal tubes ranges from 5000 to 15000 Kcal/hr.m² .°C. Condensation of vapor is carried out inside the tube in a shell and tube heat exchanger, when the

Heat Transfer Overall thermal resistance for conductive heat transfer through a series of flat resistances is equal to the

Heat Transfer Which of the following is directly concerned with the heat transfer?

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

Heat Transfer Prandtl number is the ratio of

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

Heat Transfer
Condensing film co-efficient for steam on horizontal tubes ranges from 5000 to 15000 Kcal/hr.m² .°C. Condensation of vapor is carried out inside the tube in a shell and tube heat exchanger, when the

Heat Transfer
Overall thermal resistance for conductive heat transfer through a series of flat resistances is equal to the

Heat Transfer
Which of the following is directly concerned with the heat transfer?

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

Heat Transfer
Prandtl number is the ratio of