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Heat and Mass Transfer

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

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

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Heat and Mass Transfer
The concept of overall coefficient of heat transfer is used in case of heat transfer by

Convection
Conduction
Conduction and convection
Radiation

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Heat and Mass Transfer
Depending on the radiating properties, a body will be opaque when

P = 0, x = 1 and a = 0
P = 0, x = 0 and a = 1
P=1, x = 0 and a = 0
X = 0, a + p = 1

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Heat and Mass Transfer
Which of the following has maximum value of thermal conductivity?

Steel
Copper
Brass
Aluminium

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Heat and Mass Transfer
The rate of energy emission from unit surface area through unit solid angle, along a normal to the surface, is known as

Intensity of radiation
Emissivity
Reflectivity
Transmissivity

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Heat and Mass Transfer
Pick up the wrong case. Heat flowing from one side to other depends directly on

Temperature difference
Thickness
Time
Face area

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MORE MCQ ON Heat and Mass Transfer

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