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Heat and Mass Transfer

Heat and Mass Transfer
If the temperature of a solid surface changes form 27°C to 627°C, then its emissive power changes in the ratio of

3
9
270
81

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Heat and Mass Transfer
Joule sec is the unit of

Kinematic viscosity
Universal gas constant
Thermal conductivity
Planck's constant

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Heat and Mass Transfer
The use of heat exchangers is made in

Radiators in automobile
Condensers and evaporators in refrigeration and air conditioning units
Condensers and boilers in steam plants
All of these

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Heat and Mass Transfer
The emissive power of a body depends upon its

Physical nature
Temperature
Wave length
All of these

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Heat and Mass Transfer
The amount of radiation mainly depends on

All of these
Type of surface of body
Temperature of body
Nature of body

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Heat and Mass Transfer
The heat is transferred by conduction, convection and radiation in

Boiler furnaces
None of these
Condensation of steam in condenser
Melting of ice

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