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Engineering Thermodynamics — Minor 1 2023 question paper

MMMUT Mechanical Engineering previous year question paper for Engineering Thermodynamics (BME-155), semester 2, Minor 1 2023. All 8 questions are listed below, each with a written answer on Nexsus.

Paper details

  • Subject: Engineering Thermodynamics (BME-155)
  • Branch: Mechanical Engineering
  • Semester: 2
  • Exam: Minor 1 2023
  • Questions: 8

Questions asked in Engineering Thermodynamics Minor 1 2023

  1. Q1. Attempt any Two parts of the following. Q. 1 (a) is compulsory.
  2. Q1(a). 0.2 m^3 of air at a pressure of 400kPa and 430 K is contained inside a thermally insulated cylinder. A movable piston fitted inside the cylinder is pushed outwards to a position where the pressure is 100 kPa. During this operation, the piston assembly does not exchange any heat with the surroundings. The air is then supplied heat at constant pressure till its enthalpy increases by 60 kJ.… [5 marks]
  3. Q1(b). Define the following: (i). Path function and point function. (ii) Control volume and control surface [3 marks]
  4. Q1(c). Derive the Expressions for heat transfer and polytropic specific heat in case of polytropic process by a closed system. [3 marks]
  5. Q2. Attempt any Two parts of the following. Q. 2 (a) is compulsory.
  6. Q2(a). A certain water heater operates under stress flow conditions receiving 4.2 kg/s of water at 75°C of temperature, enthalpy 315.93 kJ/Kg. The water is heated by mixing with steam which is supplied to the heater at temperature of 100.2°C and enthalpy of 2676 kJ/Kg. The mixture leaves the heater as liquid water at temperature of 100°C and enthalpy 419 kJ/Kg. How much steam must be supplied to the… [4 marks]
  7. Q2(b). Write down the statement of second law of thermosyamics and Slow the working of Refrigerator. [3 marks]
  8. Q2(c). Define the working of Carnot cycle with a neat sketch, P-V and T-S Diagram. Also define the formula for its thermal efficiency. [3 marks]