(SEM II) THEORY EXAMINATION 2024-25 FUNDAMENTALS OF MECHANICAL ENGINEERING

B.Tech (Semester II) Theory Examination 2024–25

Maximum Marks: 70 | Time: 3 Hours

Medium: Hindi / English / Mixed

This question paper evaluates a student’s understanding of basic mechanical engineering principles, including mechanics, thermodynamics, refrigeration, engines, turbines, viscosity, pressure measurement, mechatronics, and material behavior.
The paper is divided into three major sections – A, B, and C, progressing from short conceptual questions to analytical and numerical problems.

SECTION A – Short Answer Questions (14 Marks | 7 × 2)

This section tests basic definitions, concepts, and straightforward explanations.

Topics include:

Poisson’s ratio and elastic constants

Electric vs conventional engine-based vehicles

COP of refrigeration system

Newtonian and Non-Newtonian fluids

Temperature-measuring instruments

Mechatronics and its key elements

Difference between dry bulb and wet bulb temperatures

Focus: Fundamental theory, definitions, and direct concepts.

SECTION B – Descriptive Questions (21 Marks | Attempt Any 3)

This section tests understanding through diagrams, construction, working principles, and engineering explanations.

Topics include:

Stress–strain diagrams for ductile & brittle materials

Construction, working, P–V and T–S diagrams for 4-stroke petrol engine

Domestic refrigerator construction & working

Pelton wheel turbine schematic and applications

Prony brake dynamometer construction & brake power formula derivation

Focus: Diagram-based explanations, processes, and engineering mechanisms.

SECTION C – Long/Analytical Questions (35 Marks | 5 Questions × 7 Marks Each)

Application-based and numerical questions.

Q3 — Mechanics / Force Resultant

Choose one:

Resultant tension on a vessel pulled by two locomotives + angle calculation

Support reactions in a beam (static equilibrium)

Q4 — IC Engines & Vehicles

Choose one:

Comparison of CI vs SI engines + role of MPFI

Comparison of EVs, HEVs & IC-engine vehicles (fuel economy, emissions, cost, range, suitability)

Q5 — Thermodynamics & HVAC

Choose one:

Heat pump definition + numerical on minimum power required

Short notes on: dew point temperature & comfort air-conditioning

Q6 — Viscosity & Fluid Mechanics

Choose one:

Dynamic & kinematic viscosity of oil between sliding plates (numerical)

Pascal’s law + hydraulic press numerical (force multiplication)

Q7 — Pressure Measurement & Power Transmission

Choose one:

Pressure measuring methods (industrial instruments)

Power transmission systems: Ratchet mechanism & Belt drive