Thermal conductivities of most of the liquids __________ with rise in temperature.

Heat Transfer
Thermal conductivities of most of the liquids __________ with rise in temperature.

Remains unchanged

Decreases

May increase or decrease; depends on the liquid

Increases

Remains unchanged

Decreases

May increase or decrease; depends on the liquid

Increases

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Heat Transfer
Heat transfer rate described by Fourier's law will decrease, if the __________ increases.

Temperature difference

Thermal conductivity

Heat transfer area

Thickness

Temperature difference

Thermal conductivity

Heat transfer area

Thickness

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Heat Transfer
__________ equation relates the thermal conductivity of a solid to its temperature.

Kopp's

Lee's

Kistyakowski

Antonie

Kopp's

Lee's

Kistyakowski

Antonie

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Heat Transfer
A body is called grey if the monochromatic emissivity of the body is

Different for all wavelengths

Zero

Same for all wavelengths

Unity

Different for all wavelengths

Zero

Same for all wavelengths

Unity

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Heat Transfer
In a gas-liquid shell and tube heat exchanger, the

Gases to be heated/cooled is normally routed through the shell side, because the corrosion caused by the cooling water or steam condensate remain localised to the tubes

Presence of a non-condensible gas decreases the condensing film co-efficient

All of these

Gases under high pressure are routed through the tube side, because high pressure gases are corrosive in nature

Gases to be heated/cooled is normally routed through the shell side, because the corrosion caused by the cooling water or steam condensate remain localised to the tubes

Presence of a non-condensible gas decreases the condensing film co-efficient

All of these

Gases under high pressure are routed through the tube side, because high pressure gases are corrosive in nature

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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

25

40.5

34.4

26.8

25

40.5

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Heat Transfer

Heat Transfer Thermal conductivities of most of the liquids __________ with rise in temperature.

Heat Transfer Heat transfer rate described by Fourier's law will decrease, if the __________ increases.

Heat Transfer __________ equation relates the thermal conductivity of a solid to its temperature.

Heat Transfer A body is called grey if the monochromatic emissivity of the body is

Heat Transfer In a gas-liquid shell and tube heat exchanger, the

Heat Transfer
Thermal conductivities of most of the liquids __________ with rise in temperature.

Heat Transfer
Heat transfer rate described by Fourier's law will decrease, if the __________ increases.

Heat Transfer
__________ equation relates the thermal conductivity of a solid to its temperature.

Heat Transfer
A body is called grey if the monochromatic emissivity of the body is

Heat Transfer
In a gas-liquid shell and tube heat exchanger, the