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InsemOct 20232019 patternSE Mech

Engineering Thermodynamics SPPU Insem Question Paper Oct 2023

All 4 questions from this SPPU insem paper, as printed. Read them here or open the PDF.

Open the PDFMost repeated Engineering Thermodynamics questions
Subject code
202043
Pattern
2019 pattern
Exam
Insem
Session
Oct 2023
Max. marks
30
Time
1 Hour
Semester
III
Paper code
[6186]-562

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

Instructions to the candidates

  1. Answer Q.1 or Q.2, Q.3 or Q.4.
  2. Neat diagrams must be drawn wherever necessary.
  3. Figures to the right side indicate full marks.
  4. Use of electronic pocket calculator is allowed.
  5. Assume suitable data if necessary.

Questions

  1. Q1

    1. a)

      Explain in detail i) Macroscopic and Microscopic approach. ii) Path function and point function

      [8]
    2. b)

      A gas having initial pressure, volume, temperature as 275kN/m 2 , 0.09m 3 , 185ºc is compressed at constant pressure until its temperature is 15ºc. Calculate the amount of heat transferred and work done during the process. Take R = 290 kJ/kg-K C p = 1.005 kJ/kg-K.

      [7]

  2. Q2

    1. a)

      State “Steady Flow Energy Equation” (S.F.E.E.) and applications of steady flow energy equation on i) Pump ii) Turbine

      [8]
    2. b)

      A gas expands ideally, insulated nozzle following a reversible polytropic law p v 1.2 = C there is no change in potential energy but pressure drops form 20 bar to 2 bar and the specific volume increases from 0.05m 3 to 0.3m 3 . If the entrance velocity is 80 m/s determine the exit velocity. 2

      [7]

  3. Q3

    1. a)

      State Kelvin Plank and Clausius statement of second law of thermodynamics and prove that violation of Kelvin plank statement results into violation of Clausius statement?

      Also asked:Nov 2023

      [7]
    2. b)

      Explain i) Boyles Law ii) Avogadro’s law 1) Charles Law 2) Universal gas constant

      [8]

  4. Q4

    1. a)

      Explain Carnot cycle with PV and TS diagram give expression for the efficiency of Carnot cycle?

      [5]
    2. b)

      State the limitations of first law of thermodynamics?

      [3]
    3. c)

      An engineer claims his engine to develop 3.75 kW. On testing the engine consumes 0.44 kg of fuel per hour having calorific value of 42000 kJ/kg. The maximum temperature recorded in the cycle is 1400 ºC and minimum is 350 ºC. Find whether the engineer is justified in his claim?   

      [7]