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Assignment -2
(To be done after studying the course material)
Course Code: MRW-002
Course Title: Heat Transfer
Assignment Code: MRW-002/TMA/2024
Maximum Marks: 100
Last Date of Submission: April 30, 2024 (For June TEE), September 30, 2024 (For December TEE)
Note:
1. For any question worth 5 marks the word limit is 200 words, for a 10 mark question it is 350 words.
2. All questions are compulsory. Marks for the questions are shown within brackets on the right-hand
side.

Q.1 Enlist the aims of studying heat transfer and describe its various applications. 10
Q.2 State Fourier’s law and explain the various terms in the expression for Fourier’s law. Also give its features.10
Q.3 Derive the expression for thermal resistance for the composite plane wall shown in Figures given below. Assume area of cross-section to be ‘A’ for the Fig. a.

Q.4 Derive the expression for overall heat transfer co-efficient. 10
Q.5 Derive the expression for critical radius of insulation for a cylindrical tube and explain its significance. 10
Q.6 Define the following dimensionless numbers 10
a) Nusselt number
b) Peclet number
c) Prandtl number
d) Rayleigh number
e) Reynolds number
Q.7 Define the following: 10
a) Radiosity
b) Absorptivity
c) Reflectivity
d) Transmissivity
e) Spectral Intensity
Q.8 Derive the expression for shape factor for radiation emitting from a surface ‘i’ and reaching the surface ‘j’. 10
Q.9 How are the heat exchangers classified? Describe any one gas to liquid type heat exchanger. 10
Q.10 Compare a straight tube and bent tube boiler with neat sketches while enlisting the advantages and disadvantages.

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