**MRW 002 Solved Assignment 2023-24**

**Heat Transfer**

*MRW 002
Solved Assignment 2023-24 : All assignments are in PDF format which would be
send on email/WhatsApp (9958676204) just after payment.*

**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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**IGNOU MRW 002 Solved Assignment 2023-24 :-** Those students who had successfully submitted their
Assignments to their allocated study centers can now check their Assignment
Status. Alongside --assignment status, they will also checkout their assignment
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
3-4 weeks. MRW 002 Solved Assignment 2023-24 it'd take 40 days to declare MRW
002 Solved Assignment 2023-24

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