B.TechSemester 32025-26ThermodynamicsBME301
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Thermodynamics (BME301) - AKTU Question Paper 2025-26

B.Tech · Semester 3 · Free PDF Download

This is the official AKTU Thermodynamics Previous Year Question Paper for B.Tech Semester 3, academic session 2025-26. Published by Dr. A.P.J. Abdul Kalam Technical University (AKTU/UPTU), Lucknow. Free PDF download — no login required.

Course:B.Tech
Semester:Semester 3
Session:2025-26
University:AKTU / UPTU

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Questions Asked in 2025-26

Thermodynamics (BME301) — extracted question text · 70 marks · 3 Hours

Section AAttempt all q u e s t i o n s i n b r i e f . 02 x 7 = 14
  • a
    Differentiate between macroscopic and microscopic viewpoints in thermodynamics
  • b
    State the Zeroth Law of Thermodynamics
  • c
    What is a PMM-I? Why is it impossible?
  • d
    State the Kelvin-Planck statement of the Second Law
  • e
    Define Available Energy and Unavailable Energy
  • f
    Write down the two fundamental TdS equations
Section BAttempt any three o f t h e f o l l o w i n g : 07 x 3 = 21
  • a
    Define thermodynamics and the concept of a thermodynamic system . Differentiate between open, closed, and isolated systems
  • b
    Derive the steady flow energy equation and apply it to a compressor and turbine
  • c
    State the Kelvin-Planck and Clausius statements of the second l aw and establish their equivalence
  • d
    Derive Maxwell’s equations
  • e
    Define saturated states, sub-cooled liquid, and superheated vapor state
Section CAttempt any one p a r t o f t h e f o l l o w i n g : 07 x 1 = 07
  • a
    Define work and heat. Discuss the conventions used for sign ass ignment for both heat and work interactions. 1 K2 A gas is compressed from an initial state of 100 kPa and 0.01 m 3 to a final state of 500 kPa and 0.002 m 3. The process follows the path PV 1.2 = constant. Calculate the shaft work done if the process is carried out in a piston-cylinder device
  • a
    Define Internal Energy and Enthalpy. Show that for an ideal gas , both internal energy and enthalpy are functions of temperature only. 2 K3 Air enters a compressor at 1 bar, 300 K with negligible velocit y and exits at 5 bar, 500 K with a velocity of 100 m/s. The mass flow rate is 0. 5 kg/s. The power input to the compressor is 100 kW. Assuming air as an ideal gas with Cp = 1.005 kJ/kg K, determine the rate of heat transfer from the compressor
  • a
    10 kg of water at 100 0C is mixed with 5 kg of water at 10 0C in an insulated tank. Calculate the total entropy change for the process. Take Cp = 4.18 kJ/kg K. 4 K3 Define Second Law Efficiency (II). Show that the Irreversibilit y(I) for a process is equal to the product of the reference temperature (T 0) and the Entropy Generation (Sgen)
  • a
    Derive the Maxwell Relations from the basic thermodynamic poten tials (Helmholtz and Gibbs function). 5 K3 Draw and explain the ideal Rankine cycle on both T-S and P-h di agrams. List the four basic components of the cycle and state the process that o ccurs in each component

Question text is extracted from the official AKTU question paper PDF above. Check the original PDF for equations, diagrams and complete wording. Extracted: 2026-08-23.

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