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Heat and Mass Transfer

Heat and Mass Transfer
Unit of thermal conductivity in M.K.S. units is

K cal/hr m² °C
K cal/kg m² °C
K cal m/hr m² °C
K calm/hr °C

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Heat and Mass Transfer
All radiations in a black body are

Refracted
Absorbed
Transmitted
Reflected

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Heat and Mass Transfer
A grey body is one whose absorptivity

Varies with temperature
Is equal to its emissivity
Varies with wavelength of the incident ray
Does not vary with temperature and. wavelength of the incident ray

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Heat and Mass Transfer
The amount of heat flow through a body by conduction is

Directly proportional to the surface area of the body
All of these
Directly proportional to the temperature difference on the two faces of the body
Dependent upon the material of the body

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Heat and Mass Transfer
Joule sec is the unit of

Universal gas constant
Thermal conductivity
Kinematic viscosity
Planck's constant

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Heat and Mass Transfer
An ordinary passenger aircraft requires a cooling system of capacity.

8 TR
10 TR
2 TR
4 TR

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MORE MCQ ON Heat and Mass Transfer

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