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

26.8

40.5

25

34.4

26.8

40.5

25

34.4

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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

(R₁/R₂)2

1

R₂/(R₁+R₂)

(R₁/R₂)2

1

R₂/(R₁+R₂)

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Heat Transfer
Double pipe heat exchangers are preferably useful, when

A corrosive liquid is to be heated

Requirement of heat transfer area is low

Overall heat transfer co-efficient is very high

High viscosity liquid is to be cooled

A corrosive liquid is to be heated

Requirement of heat transfer area is low

Overall heat transfer co-efficient is very high

High viscosity liquid is to be cooled

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Heat Transfer
Steam traps are provided in steam carrying pipelines to

condense steam

remove condensate and inert gases

none of the listed here

release excess steam pressure by bleeding steam.

condense steam

remove condensate and inert gases

none of the listed here

release excess steam pressure by bleeding steam.

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Heat Transfer
A process stream of dilute aqueous solution flowing at the rate of10 Kg.s⁻¹ is to be heated. Steam condensate at 95°C is available for heating purpose, also at a rate of 10 Kg.s⁻¹. A 1 - 1 shell and tube heat exchanger is available. The best arrangement is

Parallel flow with process stream on tube side

Counter flow with process stream on tube side

Counter flow with process stream on shell side

Parallel flow with process stream on shell side

Parallel flow with process stream on tube side

Counter flow with process stream on tube side

Counter flow with process stream on shell side

Parallel flow with process stream on shell side

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Heat Transfer
Electro-magnetic spectrum range, which is important for radiation varies from __________ microns.

1 to 100

10 to 100

0.5 to 50

100 to 1000

1 to 100

10 to 100

0.5 to 50

100 to 1000

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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 Double pipe heat exchangers are preferably useful, when

Heat Transfer Steam traps are provided in steam carrying pipelines to

Heat Transfer A process stream of dilute aqueous solution flowing at the rate of10 Kg.s⁻¹ is to be heated. Steam condensate at 95°C is available for heating purpose, also at a rate of 10 Kg.s⁻¹. A 1 - 1 shell and tube heat exchanger is available. The best arrangement is

Heat Transfer Electro-magnetic spectrum range, which is important for radiation varies from __________ microns.

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
Double pipe heat exchangers are preferably useful, when

Heat Transfer
Steam traps are provided in steam carrying pipelines to

Heat Transfer
A process stream of dilute aqueous solution flowing at the rate of10 Kg.s⁻¹ is to be heated. Steam condensate at 95°C is available for heating purpose, also at a rate of 10 Kg.s⁻¹. A 1 - 1 shell and tube heat exchanger is available. The best arrangement is

Heat Transfer
Electro-magnetic spectrum range, which is important for radiation varies from __________ microns.