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EndsemNov 20252019 patternTE Mech

Heat & Mass Transfer (HMT) SPPU Endsem Question Paper Nov 2025

All 8 questions from this SPPU endsem paper, as printed. Read them here or open the PDF.

Open the PDFMost repeated HMT questions
Subject code
302042
Pattern
2019 pattern
Exam
Endsem
Session
Nov 2025
Max. marks
70
Time
2½ Hours
Semester
V
Paper code
[6583]-165

Printed for: T.E. ( Mechanical/ Mechanical - S .W. )

Instructions to the candidates

  1. Answer Q1 or Q2, Q3 or Q4, Q5 or Q6, Q7 or Q8.
  2. Neat diagrams must be drawn wherever necessary.
  3. Figures to the right indicate full marks.
  4. Assume suitable data wherever necessary.

Questions

  1. Q1

    1. a)

      This part has equations that don’t show as text. Open the PDF to read it.

      [9]
    2. b)

      This part has equations that don’t show as text. Open the PDF to read it.

      [9]

  2. Q2

    1. a)

      Explain pool boiling and Regimes of pool boiling.

      [8]
    2. b)

      Differentiate between Thermal Boundary layer and Hydrodynamic boundary layer.

      [6]
    3. c)

      Explain significance of Grashoff number and Nusselt number.

      [4]

  3. Q3

    1. a)

      What do you understand by surface resistance and space resistance?

      [7]
    2. b)

      Explain the following i) Stefan’s Boltzmann’s law ii) Wiens Displacement law iii) Kirchoff’s law iv) Plank’s law

      Also asked:Nov 2023 ·May 2023

      [10]

  4. Q4

    1. a)

      A sphere of radius 5cm is concentric with another sphere. Find the radius of the outer sphere so that the shape factor of outer sphere with respect to the inner sphere is 0.6. Let shape factor of inner with respect to the outer sphere is 1.

      [8]
    2. b)

      This part has equations that don’t show as text. Open the PDF to read it.

      [9]

  5. Q5

    1. a)

      A steel rectangular container having walls 16mm thick is utilized to store hydrogen gas at elevated pressure. The molar concentrations of hydrogen in the steel at the inside and outside surfaces are 1.2kg mole/m 3 and zero respectively. Assuming the diffusion coefficient for hydrogen in steel as 0.248 × 10 –12 m 2 /s, Calculate the molar diffusion flux for hydrogen through the steel.

      [9]
    2. b)

      Define: i) Mass Diffusion velocity ii) Molar Diffusion velocity iii) Mass Diffusion Flux iv) Molar Diffusion Flux 3

      Also asked:Nov 2023

      [8]

  6. Q6

    1. a)

      State and explain Fick’s law for mass diffusion.

      Also asked:May 2024 ·Nov 2023 ·May 2023 ·Jul 2022

      [8]
    2. b)

      This part has equations that don’t show as text. Open the PDF to read it.

      [9]

  7. Q7

    1. a)

      Derive an expression for LMTD of a Parallel flow heat exchanger.

      Also asked:May 2024 ·Nov 2023 ·May 2023 ·Jul 2022

      [8]
    2. b)

      Define following terms. i) Fouling factor ii) Capacity ratio iii) Effectiveness iv) NTU v) Over all heat transfer coefficient

      [10]

  8. Q8

    1. a)

      Derive an expression for effectiveness of a parallel-flow heat exchanger in terms of NTU and capacity ratio.

      Also asked:May 2024 ·May 2023

      [8]
    2. b)

      This part has equations that don’t show as text. Open the PDF to read it.

      [10]