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Heat and Mass Transfer

Heat and Mass Transfer
The emissivity for a black body is

0.75
1
0.5

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Heat and Mass Transfer
Joule sec is the unit of

Planck's constant
Thermal conductivity
Kinematic viscosity
Universal gas constant

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Heat and Mass Transfer
In heat exchangers, degree of approach is defined as the difference between temperatures of

Hot medium outlet and cold water inlet
Hot medium outlet and cold water outlet
Hot medium inlet and outlet
Cold water inlet and outlet

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Heat and Mass Transfer
The radiation emitted by a black body is known as

Full radiation
Total radiation
All of these
Black radiation

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Heat and Mass Transfer
The ratio of Nusselt number and the product of Reynold's number and Prandtl number is equal to

Stanton number
Biot number
Grashoff number
Peclet number

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Heat and Mass Transfer
Temperature of steam at around 540°C can be measured by

Thermistor
Thermocouple
Thermometer
None of these

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MORE MCQ ON Heat and Mass Transfer

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