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EndsemNov 20252019 patternSE Mech

Engineering Thermodynamics 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 Engineering Thermodynamics questions
Subject code
202043
Pattern
2019 pattern
Exam
Endsem
Session
Nov 2025
Max. marks
70
Time
2½ Hours
Semester
III
Paper code
[6582]-126

Printed for: S.E. (Mechanical / Automobile & Mechanical) ( Mechanical S .W. )

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. Neat diagrams must be drawn wherever necessary.
  3. Figures to the right indicate full marks.
  4. Use of electronic pocket calculator is allowed.
  5. Assume suitable data if necessary.

Questions

  1. Q1

    1. a)

      State and prove clausius Inequality?

      [6]
    2. b)

      5kg of ICE at -5 0 C is exposed to atmosphere which is at 30 0 C. The ice melts and then comes into thermal equilibrium with the surrounding determine entropy increase of the universe.

      [6]
    3. c)

      Prove that entropy is the property of the system.

      Also asked:May 2024

      [5]

  2. Q2

    1. a)

      Explain i) Entropy ii) Effectiveness iii) Second law efficiency.

      [6]
    2. b)

      Different between unavailable and available energy.

      Also asked:May 2024

      [6]
    3. c)

      30 kg of copper block, C P =0.386 kJ/kgk at 95 0 C is dropped in 30 liters of water at 24 0 C. Assume perfect heat transfer and no heat lost to the surroundings. Find the final equilibrium temperature reached for water and copper block and entropy generation.

      [5]

  3. Q3

    1. a)

      Write short notes on following terms. i) Critical Point ii) Enthalpy of Steam iii) Triple Point

      [6]
    2. b)

      Determine superheated entropy, enthalpy and specific volume for a steam at 20 bar and 250 0 C using steam table.

      [6]
    3. c)

      Draw and explain P-V Diagram for water.

      [6]

  4. Q4

    1. a)

      Explain Separating and throttling calorimeter.

      Also asked:Nov 2023 ·May 2023

      [6]
    2. b)

      Difference between Rankin cycle and Carnot cycle.

      Also asked:May 2024

      [6]
    3. c)

      Explain Carnot vapour power cycle with the help of T-S diagram.

      Also asked:May 2024

      [6]

  5. Q5

    1. a)

      Write down the advantages and disadvantages of gaseous fuel.

      [6]
    2. b)

      Explain Boys Gas Calorimeter with a schematic diagram.

      Also asked:May 2024

      [6]
    3. c)

      A Carnot vapour power cycle operaters between 20kpa and 800kpa steam pressures. Calculate net work per cycle and cycle efficiency.

      [5]

  6. Q6

    1. a)

      Explain ORSAT Flue gas analysis.

      [6]
    2. b)

      A Bomb calorimeter water used to determine the calorific value of a coal sample and the following reading where recorded Mass of coal sample = 1.01gm Mass of water = 2.5kg Water equivalent of apparatus = 744gm Temperature of rise water = 2.59 0 C Temperature correction of cooling = +0.016 0 c Determine the calorific value of sample in kJ/kg Take c p for water 4.186kj/kg k.

      [6]
    3. c)

      Explain Equivalence ratio, Calorific value - HCV & LCV.

      [5]

  7. Q7

    1. a)

      Define Boiler and Classify The Boilers.

      [6]
    2. b)

      How much air per kg of coal is burnt in a boiler having chimney height of 32.3m to create a drought of 19mm of water column when the temperature of the flue gases leaving chimney is 370 0 C and temperature of boiler house is 29.5 0 C. Also calculate the drought produced in terms of hot gas column.

      [6]
    3. c)

      Explain the procedure to draw the heat balance sheet for a boiler plant.

      [6]

  8. Q8

    1. a)

      Explain Superheater and Economizer.

      [6]
    2. b)

      A boiler evaporates 3.6 kg of water per kg of coal is saturated steam at 10 bar. The temperature of feed water is 32 0 c. find the euivalent evaporation. From and at 100 0 C as well as the factor of Evaporator.

      [6]
    3. c)

      Explain functions and locations of different boiler mountings. ♣♣♣

      [6]