Applied Thermodynamics SPPU Insem Question Paper Mar 2026

Questions

1. Q1

   1. a)

      Explain the factors affecting the performance of a Vapour Compression System with p-h diagram. i) Effect of suction pressure ii) Effect of superheating iii) Effect of suction temperature and condenser temperature

      [8]
   2. b)

      In a summer air conditioner, an atmospheric air enters at 30ºC DBT and 18ºC WBT. The air leaves the air conditioner at 20ºC DBT without changing the moisture content. Find the following; i) Initial enthalpy and specific humidity of air ii) Final relative humidity of air and its WBT iii) Sensible heat removed per kg of air.

      [7]
   OR

2. Q2

   1. a)

      Explain with the help of psychrometric chart following process; i) Humidification ii) Dehumidification iii) Sensible Cooling with humidification iv) Sensible heating with dehumidification 2 Apr-26/SE/Insem-315

      [8]
   2. b)

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

      [7]

3. Q3

   1. a)

      Explain with neat sketch Valve timing diagram for 4 stroke SI engine and 4 stroke CI engine.

      [8]
   2. b)

      Give the limitations of air standard cycle. Explain with suitable graphs, the effect of dissociation on maximum temperature and brake power. How does presence of CO affect dissociation?

      [7]
   OR

4. Q4

   1. a)

      State classification of IC engines on the basis of eight different factors.

      [8]
   2. b)

      Briefly explain the following Losses in an actual fuel- air cycle; i) Friction Losses ii) Time Losses iii) Blow down Losses iv) Pumping Losses eeee

      [7]