Heat and Mass Transfer MCQs
Practice free Heat and Mass Transfer multiple-choice questions with instant answer feedback and step-by-step solutions. Click an option to check yourself, reveal the full explanation, and work through all 163 questions — no login required.
Question 28hard
A composite slab has two layers of different materials with thermal conductivities k1 and k2. If each layer has the same thickness, then the equivalent thermal conductivity of the slab will be
Question 30hard
Depending on the radiating properties, a body will be black when (Where a = absorptivity, p = reflectivity, x = transmissivity.)
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Question 31hard
Heat conducted through per unit area and unit thick face per unit time when temperature difference between opposite faces is unity, is called
Question 32hard
The rate of heat flow through a body is $${\text{Q}} = \frac{{{\text{kA}}\left( {{{\text{T}}_1} - {{\text{T}}_2}} \right)}}{{\text{x}}}.$$ The term $$\frac{{\text{x}}}{{{\text{kA}}}}$$ is known as
Question 33hard
Depending on the radiating properties, a body will be white when (Where a = absorptivity, p = reflectivity, x = transmissivity)
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Question 34hard
Depending on the radiating properties, body will be transparent when(Where a = absorptivity, p = reflectivity, x = transmissivity)
Question 36hard
In heat transfer, conductance equals conductivity (kcal/hr/sq.m/°C/cm) divided by