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?

81.25

35.5

48.25

43.75

81.25

35.5

48.25

43.75

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Heat Transfer
Multipass heat exchangers are used

To obtain higher heat transfer co-efficient and shorter tube

To reduce the pressure drop

For low heat load

Because of simplicity of fabrication

To obtain higher heat transfer co-efficient and shorter tube

To reduce the pressure drop

For low heat load

Because of simplicity of fabrication

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Heat Transfer
In a single effect evaporator, the economy is

> 1

1

None of these

< 1

> 1

1

None of these

< 1

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Heat Transfer
Open pan evaporators are preferred to be used, when the solution to be concentrated is

Scaling

Salty

Corrosive

Highly viscous

Scaling

Salty

Corrosive

Highly viscous

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Heat Transfer
In a parallel flow heat exchanger, if the outlet temperature of hot and cold fluids are the same, then the log mean temperature difference (LMTD) is

Maximum

Minimum

Infinity

Zero

Maximum

Minimum

Infinity

Zero

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Heat Transfer
Water always boils when its

Saturated vapour pressure equals the external pressure on its surface

Saturated vapour pressure is less than the atmospheric pressure

Vapour pressure equals 76 cm of Hg

Temperature reaches 100° C

Saturated vapour pressure equals the external pressure on its surface

Saturated vapour pressure is less than the atmospheric pressure

Vapour pressure equals 76 cm of Hg

Temperature reaches 100° C

ANSWER DOWNLOAD EXAMIANS APP

Heat Transfer

Heat Transfer Multipass heat exchangers are used

Heat Transfer In a single effect evaporator, the economy is

Heat Transfer Open pan evaporators are preferred to be used, when the solution to be concentrated is

Heat Transfer In a parallel flow heat exchanger, if the outlet temperature of hot and cold fluids are the same, then the log mean temperature difference (LMTD) is

Heat Transfer Water always boils when its

Heat Transfer
Multipass heat exchangers are used

Heat Transfer
In a single effect evaporator, the economy is

Heat Transfer
Open pan evaporators are preferred to be used, when the solution to be concentrated is

Heat Transfer
In a parallel flow heat exchanger, if the outlet temperature of hot and cold fluids are the same, then the log mean temperature difference (LMTD) is

Heat Transfer
Water always boils when its