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EndsemNov 20232019 patternTE Mech

Heat & Mass Transfer (HMT) SPPU Endsem Question Paper Nov 2023

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 2023
Max. marks
70
Time
2½ Hours
Semester
I
Paper code
[6180]-179

Printed for: T.E. (Mechanical)/(Mechanical Sandwich Engg.)

Instructions to the candidates

  1. Answer Q.1 or Q.2, Q.3 or Q.4, Q.5 or Q.6, Q.7 or Q.8.
  2. Draw neat diagram wherever necessary.
  3. Use of scientific calculator is allowed.
  4. Assume Suitable data if necessary.
  5. Figures to the right indicate full marks.

Questions

  1. Q1

    1. a)

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

      [10]
    2. b)

      Explain i) Reynolds Number ii) Nusselt Number iii) Grashof Number iv) Stanton Number

      [8]

  2. Q2

    1. a)

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

      [10]
    2. b)

      Mention difference between film wise and drop wise condensation, Explain pool boiling and Regimes of pool boiling. 2

      [8]

  3. Q3

    1. a)

      Explain the following terminology of Radiation. i) Planck’s Law ii) Kirchhoff’s law iii) Wein’s Displacement Law iv) Stefan-Boltzmann law

      Also asked:Nov 2025 ·May 2023

      [12]
    2. b)

      Derive and expression for the shape factor in case of radiation exchange between two surfaces.

      [5]

  4. Q4

    1. a)

      Two large parallel plates are maintained at temperatures of 600 °C and 300 °C having their emissivity’s of 0.9 and 0.4 respectively. A radiation shield having emissivity of 0.02 is inserted in between them. Calculate i) Heat transfer rate without shield ii) Heat transfer rate with shield and Use σ = 5.67×10 –8 W/m 2 K 4

      [10]
    2. b)

      Define shape factor. Explain laws of shape factor.

      [7]

  5. Q5

    1. a)

      State Fick’s Law of Diffusion and Explain Mass diffusion coefficient.

      Also asked:Nov 2025 ·May 2024 ·May 2023 ·Jul 2022

      [6]
    2. b)

      The molecular weights of the two components A and B of a gas mixture are 24 and 28 respectively. The molecular weight of gas mixture is found to be 30. If the mass concentration of the mixture is 1.2 kgm 3 , determine the following. i) Molar fractions ii) Mass fractions iii) Total pressure if temperature of mixture is 290K

      Also asked:Jul 2022

      [8]
    3. c)

      Define following Terminology. i) Mass Diffusion velocity ii) Molar Diffusion velocity iii) Mass Diffusion Flux iv) Molar Diffusion Flux 3

      Also asked:Nov 2025

      [4]

  6. Q6

    1. a)

      A mixture of CO 2 and N 2 is in a container at 25ºC, with each species having a partial pressure of 1 bar. Calculate the molar concentration, the mass density, the mole fraction, and the mass fraction of each species .

      [8]
    2. b)

      Draw Phase Diagram and explain different phases

      [5]
    3. c)

      Write down the Physical origins of mass transfer and enlist the applications of mass transfer

      [5]

  7. Q7

    1. a)

      Consider the following parallel flow heat exchanger specification: cold flow enters at 40 ºC , Cc = 20000W/K, hot flow enters at 150 ºC, Ch = 10000W/K, A = 30 m 2 , The overall heat transfer coefficient is 500 W/m 2 K. Determine the heat transfer rate and the exit temperature.

      [10]
    2. b)

      Derive LMTD for parallel flow heat exchanger and mention assumptions considered for derivations.

      Also asked:Nov 2025 ·May 2024 ·May 2023 ·Jul 2022

      [7]

  8. Q8

    1. a)

      A cross flow heat exchanger with both fluids unmixed is used to heat water flowing at a rate of 20 kg/s from 25°C to 75°C using gases available at 300°C to be cooled tol80°C. The overall heat transfer coefficient has a value of 95 W/m 2 K. Determine the area required. For gas Cp = 1005 J /kg K.

      [12]
    2. b)

      Explain TEMA standards. 

      [5]