This document contains the complete Elements of Mechanical Engineering (RME201) Theory Examination Paper for B.Tech Semester II, conducted in the academic year 2017–18. The exam carries 70 marks and has a duration of 3 hours. It evaluates a student’s understanding of engineering mechanics, strength of materials, thermodynamics, cycles, and basic mechanical system analysis.
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The paper is divided into three major sections—A, B, and C—covering definitions, theoretical explanations, numerical problems, and diagram-based analysis.
SECTION A – Short Conceptual Questions (14 Marks)
This section includes seven brief questions, focused on foundational mechanical engineering concepts:
Perpendicular axis theorem
Conditions of equilibrium for forces
Difference between determinate and indeterminate beams
Difference between centroid & center of gravity
Difference between intensive & extensive properties
Clausius inequality (Thermodynamics)
Steady Flow Energy Equation (SFEE) for compressor and boiler
These questions test conceptual clarity and basic definitions.
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SECTION B – Descriptive & Numerical Questions (21 Marks)
Students must attempt any three questions covering mechanical systems, structures, and thermodynamics:
Parallel axis theorem and radius of gyration
Truss: definition, types, and assumptions
Otto cycle on P-V & T-S diagrams + efficiency derivation
Definitions of PMM1, PMM2, pure substance, Carnot cycle & theorem
Rankine cycle analysis with turbine expansion from 80 bar, 450°C to 0.1 bar, including steam state and power output
This section evaluates reasoning, cycle understanding, and applied thermodynamics.
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SECTION C – Analytical, Diagram-Based & Numerical Problems (35 Marks)
This section includes detailed problems demanding diagrams, calculations, and derivations:
Part 1 – Friction & Moment of Inertia
Reactions on two smooth spheres inside a channel
Moment of inertia of a lamina about OX axis
Part 2 – Structures & Bending
Calculation of forces in each member of a truss
Drawing SFD (Shear Force Diagram) & BMD (Bending Moment Diagram), point of contraflexure, and maximum bending moment
Part 3 – Strength of Materials
Definitions: Shear modulus, Young’s modulus, Poisson’s ratio, Bulk modulus
Pure bending theory + derivation of bending equation
Part 4 – Thermodynamics
Derivation of Steady Flow Energy Equation (SFEE)
Heat engine + heat pump combined performance, COP, efficiency, reservoir temperature, and heat rejection rate
Part 5 – IC Engines & Thermodynamic Properties
Four-stroke petrol engine with labeled diagrams
Difference between enthalpy & internal energy
Two Carnot engines in series: determining intermediate temperature
This section tests deep analytical skills, derivation ability, engineering drawing knowledge, and numerical accuracy.
