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

40.5

26.8

34.4

25

40.5

26.8

34.4

25

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Heat Transfer
_______ paint has the maximum absorption coefficient.

Black

White

Yellow

Grey

Black

White

Yellow

Grey

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Heat Transfer
The dimensionless group in mass transfer that is equivalent to Prandtl number in heat transfer is

Nusselt number

Stanton number

Sherwood number

Schmidt number

Nusselt number

Stanton number

Sherwood number

Schmidt number

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Heat Transfer
Maximum heat transfer rate is achieved in __________ flow.

Co-current

Counter-current

Laminar

Turbulent

Co-current

Counter-current

Laminar

Turbulent

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Heat Transfer
Extended heat transfer surface like fins are used to increase the heat transfer rate. Fin efficiency is defined as the ratio of heat transferred across the fin surface to the theoretical heat transfer across an equal area held at the

Constant temperature equal to that of the base

Average temperature of the fin

Surrounding temperature

Temperature of the fin end

Constant temperature equal to that of the base

Average temperature of the fin

Surrounding temperature

Temperature of the fin end

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Heat Transfer
In an extended surface heat exchanger, fluid having lower co-efficient

Flows through the tube

Flows outside the tubes

Should not be used as it gives very high pressure drop

Can flow either inside or outside the tubes

Flows through the tube

Flows outside the tubes

Should not be used as it gives very high pressure drop

Can flow either inside or outside the tubes

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Heat Transfer

Heat Transfer _______ paint has the maximum absorption coefficient.

Heat Transfer The dimensionless group in mass transfer that is equivalent to Prandtl number in heat transfer is

Heat Transfer Maximum heat transfer rate is achieved in __________ flow.

Heat Transfer Extended heat transfer surface like fins are used to increase the heat transfer rate. Fin efficiency is defined as the ratio of heat transferred across the fin surface to the theoretical heat transfer across an equal area held at the

Heat Transfer In an extended surface heat exchanger, fluid having lower co-efficient

Heat Transfer
_______ paint has the maximum absorption coefficient.

Heat Transfer
The dimensionless group in mass transfer that is equivalent to Prandtl number in heat transfer is

Heat Transfer
Maximum heat transfer rate is achieved in __________ flow.

Heat Transfer
Extended heat transfer surface like fins are used to increase the heat transfer rate. Fin efficiency is defined as the ratio of heat transferred across the fin surface to the theoretical heat transfer across an equal area held at the

Heat Transfer
In an extended surface heat exchanger, fluid having lower co-efficient