FME PYQ 2025-26 AKTU Question Paper

AKTU · BTECH · Semester 1, 2 · Fundamentals of Mechanical Engineering · Session 2025-26 · PYQ

AKTU Fundamentals of Mechanical Engineering previous year question paper 2025-26 for B.Tech Semester 1/2. Covers Introduction to Mechanics, Introduction to…

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Fundamentals of Mechanical Engineering AKTU syllabus

  1. Unit 1: Introduction to Mechanics
  2. Unit 2: Introduction to IC Engines and Electric Vehicles
  3. Unit 3: Introduction to Refrigeration and Air-Conditioning
  4. Unit 4: Introduction to Fluid Mechanics and Applications
  5. Unit 5: Introduction to Measurement and Mechatronics

Questions in Fundamentals of Mechanical Engineering AKTU PYQ 2025-26

  1. Q1a. What is the difference between a moment and a couple? (2 marks, 2025-26)
  2. Q1a. Explain the following terms in the context of the stress-strain curve for mild steel: elastic limit, limit of proportionality, upper and lower yield point. (2 marks, 2025-26)
  3. Q1b. Difference between true strain and engineering strain. (2 marks, 2025-26)
  4. Q1b. Define the scavenging process. Briefly explain its importance in internal combustion engines. (2 marks, 2025-26)
  5. Q1c. What do you mean by scavenging? (2 marks, 2025-26)
  6. Q1c. Define and differentiate clearly between wet bulb temperature and thermodynamic wet bulb temperature. (2 marks, 2025-26)
  7. Q1d. Write down any two differences between efficiency and COP. (2 marks, 2025-26)
  8. Q1d. Why is a reciprocating pump called a positive displacement pump? (2 marks, 2025-26)
  9. Q1e. A liquid has a density of 850 kg/m³. Calculate its specific gravity. (2 marks, 2025-26)
  10. Q1e. What is meant by ‘Constant Power Speed Ratio’ as applied to an electric motor? Explain. (2 marks, 2025-26)
  11. Q1f. Define the term priming in the pump. (2 marks, 2025-26)
  12. Q1f. What do you mean by point of contraflexure? Is the point of contraflexure and the point of inflexion different? (2 marks, 2025-26)
  13. Q1g. Write the application of the mechatronics? (2 marks, 2025-26)
  14. Q1g. Mention the material used for the following components of an IC engine: cylinder block, piston, piston ring, connecting rod, crank and crankshaft, valves, and flywheel. (2 marks, 2025-26)
  15. Q2a. Find the resultant of forces 2, √3, 5, √3 & 2N that act at an angular point of regular hexagon towards the other angular point taking in an order. (7 marks, 2025-26)
  16. Q2a. State Varignon’s theorem. Discuss its applicability to three-dimensional force systems, the assumptions made regarding moment arms, and whether it can be applied to deformable bodies. (7 marks, 2025-26)
  17. Q2b. What is a Hybrid Electric Vehicle (HEV)? Describe the drive train components of an HEV and explain how energy is managed and transferred between the engine and electric motor. (7 marks, 2025-26)
  18. Q2b. Explain with suitable sketches, the working of a four-stroke CI engine. (7 marks, 2025-26)
  19. Q2c. What are the factors affecting the performance of a domestic refrigerator? Discuss methods to improve or optimize its performance. (7 marks, 2025-26)
  20. Q2c. (i) Draw a neat diagram of a window air conditioner. (ii) Define ‘Effective Temperature’. Explain its utility in comfort air conditioning. (7 marks, 2025-26)
  21. Q2d. Draw the diagram and explain the working of a suspended hydraulic lift. (7 marks, 2025-26)
  22. Q2d. A hydraulic lift consists of a 25 cm diameter ram which slides in a 25.015 cm diameter, the annular space being filled with oil having a kinematic viscosity of 0.025 cm2/sec and specific gravity of 0.85. If the rate of travel of the ram is 9.15 m/min, find the frictional resistance when 3.05 m of… (7 marks, 2025-26)
  23. Q2e. Explain the construction and working of Bourdan Tube with neat diagram for measuring the pressure. (7 marks, 2025-26)
  24. Q2e. Describe the principle of operation of a piezo-electric transducer. Identify the input and output of the system. Mention some natural and synthetic materials that exhibit the piezo-electric effect. (7 marks, 2025-26)
  25. Q3a. Determine the reaction at the support A and D in the structure shown in Figure. (7 marks, 2025-26)
  26. Q3a. A bar of 24 mm in diameter and 400 mm in length is acted upon by an axial load of 38 kN. The elongation of the bar and the change in diameter are measured as 0.165 mm and 0.0031 mm, respectively. Determine: (i) the Poisson's ratio (ii) the values of the three moduli. (7 marks, 2025-26)
  27. Q3b. A beam 8m long is hinged at A and supported on rollers over a smooth surface inclined at 30°C to the horizontal at B. The beam is loaded as shown in fig. Determine the support reaction. (7 marks, 2025-26)
  28. Q3b. A cantilever has a distributed load with linearly varying intensity, zero at the fixed end, and w per meter at the free end. Draw the shear force and bending moment diagrams. (7 marks, 2025-26)
  29. Q4a. Explain the construction and working principle of a 4-Stroke Diesel engine also draw the Pressure (P)-Volume(V) & Temperature (T) -Entropy (S) diagram with a neat diagram. (7 marks, 2025-26)
  30. Q4a. Give a neat sketch of the theoretical and actual p-V diagrams for a four-stroke petrol engine. Describe briefly the factors which accounts for the deviations between these two plots. (7 marks, 2025-26)
  31. Q4b. Explain any seven differences between a spark-ignition (SI) engine and compression-ignition (CI) engine with the help of a Pressure-Volume (P-V) and Temperature-Entropy (T-S) diagram. (7 marks, 2025-26)
  32. Q4b. Why is an Energy Management Control System (EMCS) required in a Hybrid Electric Vehicle? Do you think an elaborate energy management system similar to that applied to a hybrid vehicle is required in an electric vehicle? Explain. (7 marks, 2025-26)
  33. Q5a. A Carnot refrigerator operates between temperatures of –5°C and 35°C. If the refrigerator requires 3 kW of power input, determine: (i) Coefficient of Performance (COP) (ii) Refrigeration capacity in tons (7 marks, 2025-26)
  34. Q5a. A reversed Carnot cycle is used for cooling in summer, maintained at 5°C when the ambient temperature is 40°C. The same cycle is used for heating in winter at 55°C when the ambient temperature is 15°C. Assuming a 5°C temperature difference in the heat exchanger that exchanges heat with the… (7 marks, 2025-26)
  35. Q5b. It is proposed to heat a house using a heat pump outside air at 0°C is used as the heat source. Inside temperature of house is maintained at 30°C. The heating load estimated as 205600 KJ/hrs. Calculate the minimum power to drive the heat pump. (7 marks, 2025-26)
  36. Q5b. Describe in brief the principles and processes involved in the following methods of production of low temperatures: (i) Irreversible adiabatic expansion (throttling) of a real gas (ii) Thermoelectric cooling (iii) Adiabatic demagnetization. (7 marks, 2025-26)
  37. Q6a. A pipe of diameter 55 cm carrying water at an average velocity of 5 m/s branches into two pipes of diameters 40 cm and 30 cm. Find the discharge in the main pipe and the velocity in the 30 cm diameter pipe, given that the velocity in the 40 cm pipe is 5 m/s. (7 marks, 2025-26)
  38. Q6a. Sketch the Propeller/Kaplan turbine. Name the various components and state their functions in brief. (7 marks, 2025-26)
  39. Q6b. Explain the construction working principle of the Pelton wheel turbine with a neat sketch. (7 marks, 2025-26)
  40. Q6b. (A) Define the following set of liquid properties: (i) surface tension and capillarity, (ii) dynamic viscosity and kinematic viscosity. (B) A diver is working at a depth of 20 m below the surface of sea water (sp. wt. = 10 kN/m2). Calculate the pressure intensity at this depth. What would be the… (7 marks, 2025-26)

AKTU paper codes: BME101, BME201, KME101, KME201

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