(SEM II) THEORY EXAMINATION 2017-18 ELEMENTS OF MECHANICAL ENGINEERING

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.