MRW 002 Solved Assignment 2023-24
Heat Transfer
MRW 002
Solved Assignment 2023-24 : All assignments are in PDF format which would be
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Assignment Code: ASST/ MRW 002/2023-24
Marks: 100
Q.1 Discuss in detail
the aims of studying heat transfer and its various applications.
Q.2 a) What is
convection heat transfer? Why is it considered to be a mode of heat transfer?
b) Give two examples
each of natural and forced circulation
Q.3 A hot plate of area
0.5 m2 is maintained at a temperature of 600 C by a 100W electric heater when
room temperature is 300 C. The appropriate convection coefficient is 2.15
(T)1/3 W/m2K. What fraction of the heat supplied is lost by natural
convection? What happens to the rest of the heat supplied?
Q.4 The quantity of
radiation received by earth from the sun is 1.4 kW/m2 (solar; constant).
Assuming that sun is an ideal radiator, calculate the surface temperature of
the sun. The ratio of the radius of earth’s orbit to the radius; of the sun is
216.
Q.5 a) What is
Fourier’s law? What are its key features?
b) Calculate the net
thermal resistance and the net heat transfer for a composite wall comprising of
three walls of lengths L1, L2, L3 and thermal; conductivities K1, K2, K3
respectively in series. Area of cross-section is the same for all three walls
and is given as A.
Q.6 Derive the
expression for critical radius of insulation for a cylinder and also discuss
how thickness of insulation affects the heat transfer rate from a particular
body.
Q.7 Derive the
expression for the temperature reached by a solid at a given time ‘t’ in case
of transient heat conduction.
Q.8 Explain with the
help of a diagram the concept of hydrodynamic and thermal boundary layer for a
laminar flow over a thin flat plate. Also define critical Reynolds number and
the physical significance of Prandtl number?
Q.9 a) Explain the
following terms: i) Radiosity ii) Emission iii) Spectral Intensity
b) What is a black body
and what are its characteristics?
Q.10 State Kirchoff’s
law and derive the expression for the law. Also explain what is a gray surface?
MRW 002
Solved Assignment 2023-24 : All assignments are in PDF format which would be
send on email/WhatsApp (9958676204) just after payment.
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marks & result. All this is often available in a web mode. After submitting
the assignment, you'll check you MRW 002 Solved Assignment 2023-24 only after
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002 Solved Assignment 2023-24
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