Walls of a cubical oven are of thickness l, and they are made of material of thermal conductivity k. The temperature inside the oven is 100°C and the inside heat transfer co-efficient is 3k/l. If the wall temperature on the outside is held at 25°C, what is the inside wall temperature in degree centigrade?

Heat Transfer
Walls of a cubical oven are of thickness l, and they are made of material of thermal conductivity k. The temperature inside the oven is 100°C and the inside heat transfer co-efficient is 3k/l. If the wall temperature on the outside is held at 25°C, what is the inside wall temperature in degree centigrade?

48.25

81.25

43.75

35.5

48.25

81.25

43.75

35.5

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Heat Transfer
What is the steam economy in case of a single effect evaporator system?

< 1

0.1

1

>1

< 1

0.1

1

>1

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Heat Transfer
Leidenfrost point is a term concerned with the

Concentration of a corrosive solution by evaporation

Heat transfer between two highly viscous liquids

Boiling of a liquid on a hot surface

Condensation of the saturated vapor on a cold surface

Concentration of a corrosive solution by evaporation

Heat transfer between two highly viscous liquids

Boiling of a liquid on a hot surface

Condensation of the saturated vapor on a cold surface

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Heat Transfer
The statement that "maximum wavelength of radiation is inversly proportional to the temperature" is __________ law.

Wien's displacement

Stefan-Boltzman's

Planck's

None of these

Wien's displacement

Stefan-Boltzman's

Planck's

None of these

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Heat Transfer
Convective heat transfer co-efficient in case of fluid flowing in tubes is not affected by the tube length/diameter ratio, if the flow is in the __________ zone.

None of the listed here

highly turbulent

transition

laminar

None of the listed here

highly turbulent

transition

laminar

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Heat Transfer
For what value of Prandtl number, the Col-burn analogy is valid ?

0.6 to 120

0.06 to 120

1 to 103

l to 50

0.6 to 120

0.06 to 120

1 to 103

l to 50

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Heat Transfer

Heat Transfer What is the steam economy in case of a single effect evaporator system?

Heat Transfer Leidenfrost point is a term concerned with the

Heat Transfer The statement that "maximum wavelength of radiation is inversly proportional to the temperature" is __________ law.

Heat Transfer Convective heat transfer co-efficient in case of fluid flowing in tubes is not affected by the tube length/diameter ratio, if the flow is in the __________ zone.

Heat Transfer For what value of Prandtl number, the Col-burn analogy is valid ?

Heat Transfer
What is the steam economy in case of a single effect evaporator system?

Heat Transfer
Leidenfrost point is a term concerned with the

Heat Transfer
The statement that "maximum wavelength of radiation is inversly proportional to the temperature" is __________ law.

Heat Transfer
Convective heat transfer co-efficient in case of fluid flowing in tubes is not affected by the tube length/diameter ratio, if the flow is in the __________ zone.

Heat Transfer
For what value of Prandtl number, the Col-burn analogy is valid ?