In Joule's experiment, an insulated container contains 20 kg of water initially at 25°C. It is stirred by an agitator, which is made to turn by a slowly falling body weighing 40 kg through a height of 4 m. The process is repeated 500 times. The acceleration due to gravity is 9.8 ms⁻². Neglecting the heat capacity of agitator, the temperature of water (in °C) is

Heat Transfer
In Joule's experiment, an insulated container contains 20 kg of water initially at 25°C. It is stirred by an agitator, which is made to turn by a slowly falling body weighing 40 kg through a height of 4 m. The process is repeated 500 times. The acceleration due to gravity is 9.8 ms⁻². Neglecting the heat capacity of agitator, the temperature of water (in °C) is

34.4

26.8

40.5

25

34.4

26.8

40.5

25

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Heat Transfer
The film thickness for laminar film condensation on vertical surface __________ from top to bottom.

Cummulatively decreases

And the surface conductance increase

Cummulatively increases

Remains constant

Cummulatively decreases

And the surface conductance increase

Cummulatively increases

Remains constant

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Heat Transfer
Corrosiveness of steam condensate is due to the presence of

CO₂

Both A & B

Neither A nor B

Dissolved O₂

CO₂

Both A & B

Neither A nor B

Dissolved O₂

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Heat Transfer
One kilogram of water at 0°C is changed to superheated steam of one atm pressure and 300° C. The major heat consumption in the process will be to

To superheat the steam

Data insufficient, can

Evaporate the water

Heat the water from 0°C to 100°C

To superheat the steam

Data insufficient, can

Evaporate the water

Heat the water from 0°C to 100°C

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Heat Transfer
When vaporisation takes place through a blanketting film of gas, the phenomenon is termed as __________ boiling.

transition

film

pool

none of the listed here

transition

film

pool

none of the listed here

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Heat Transfer
Reason for operating an evaporator in multiple effect is to secure

Increased capacity

Increased steam economy

Both A and B

Decreased steam consumption

Increased capacity

Increased steam economy

Both A and B

Decreased steam consumption

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Heat Transfer

Heat Transfer The film thickness for laminar film condensation on vertical surface __________ from top to bottom.

Heat Transfer Corrosiveness of steam condensate is due to the presence of

Heat Transfer One kilogram of water at 0°C is changed to superheated steam of one atm pressure and 300° C. The major heat consumption in the process will be to

Heat Transfer When vaporisation takes place through a blanketting film of gas, the phenomenon is termed as __________ boiling.

Heat Transfer Reason for operating an evaporator in multiple effect is to secure

Heat Transfer
The film thickness for laminar film condensation on vertical surface __________ from top to bottom.

Heat Transfer
Corrosiveness of steam condensate is due to the presence of

Heat Transfer
One kilogram of water at 0°C is changed to superheated steam of one atm pressure and 300° C. The major heat consumption in the process will be to

Heat Transfer
When vaporisation takes place through a blanketting film of gas, the phenomenon is termed as __________ boiling.

Heat Transfer
Reason for operating an evaporator in multiple effect is to secure