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EndsemNov 20252019 patternSE Mech

Applied 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 Applied Thermodynamics questions
Subject code
202048
Pattern
2019 pattern
Exam
Endsem
Session
Nov 2025
Max. marks
70
Time
2½ Hours
Semester
IV
Paper code
[6582]-120

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

Instructions to the candidates

  1. Answer Q.1 or Q.2 and 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. Assume suitable data wherever necessary.

Questions

  1. Q1

    1. a)

      Explain any 3 combustion chambers used in SI Engine with neat sketch.

      [9]
    2. b)

      List the various components of simple carburetor and explain the working of simple carburetor with neat labelled diagram.

      [8]

  2. Q2

    1. a)

      Explain any three of the following Solid Injection systems used in CI engines with neat block diagram. i) Individual pump and nozzle system ii) Unit injector system iii) Common rail system iv) Distributor system

      [9]
    2. b)

      Difference between Detonation in SI and Knocking in CI Engine. (any eight points)

      [8]

  3. Q3

    1. a)

      A 4-cylinder, 4-stroke engine 6cm bore and 9cm stroke was tested at constant speed fuel supply was fixed to 0.13 kg/min and plugs of 4- cylinder were successfully short circuited without change of speed; The power measurement was as follows: With all cylinder working = 16.25kW, With No. 1 st - cylinder cut-off = 11.55kW, With No.2 nd – cylinder cut-off = 11.65 (B.P), with No.3 rd -cylinder cut-off = 11.70 kW(B.P) With No. 4 th -cylinder cut-off =11.50 kW(B.P) Find i) Indicated power ii) Mechanical efficiency iii) Indicated thermal efficiency if C.V. of fuel used is 42000 kJ/kg.

      [10]
    2. b)

      Explain briefly: i) Morsettest and ii) Heat balance sheet 2

      [8]

  4. Q4

    1. a)

      Explain briefly the Bharat stage norms and also explain the pollution norms adopted in Bharat stage 6 and give the numbers in tabular format for acceptable emission limits.

      [9]
    2. b)

      Explain with the help of a need diagram exhaust gas recirculation system

      [9]

  5. Q5

    1. a)

      Write short note on water cooling system for IC engine and explain with neat sketch thermos syphon cooling system.

      [9]
    2. b)

      Explain with neat sketch wet sump lubrication system. State any six differences between wet sump and dry sump lubrication system.

      Also asked:May 2023

      [8]

  6. Q6

    1. a)

      Explain with neat sketch working of battery ignition system? State any six differences between battery and magneto ignition system?

      [9]
    2. b)

      Explain Bio-Diesel composition, production and its properties?

      [8]

  7. Q7

    1. a)

      Write the classification of compressors? Define FAD and Volumetric Efficiency?

      [8]
    2. b)

      A single stage single acting air compressor delivers 0.6 kg of air per minute at 6 bar. The temperature and pressure at the end of suction stroke are 30ºC and 1 bar respectively. The bore and stroke of the compressor are 100 mm and 150 mm respectively. The clearance is 3% of the swept volume. Assuming the index of compression and expansion to be n = 1.3. Find the following: i) Volumetric efficiency ii) Power required in mechanical efficiency is 85% and iii) Speed of the compressor.

      Also asked:Nov 2023

      [10]

  8. Q8

    1. a)

      Short Note on i) Vane Type Compressor ii) Roots Blower

      [8]
    2. b)

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

      [10]