THEORY EXAMINATION (SEM–II) 2016-17 ELEMENTS OF MECHANICAL ENGINEERING

This examination paper is for Mechanical / Production / Automobile Engineering students.
It covers topics from Engineering Mechanics, Strength of Materials, Thermodynamics, and Manufacturing Processes.

The paper is divided into three sections that test definitions, concepts, numerical ability, and engineering applications.

SECTION – A (7 × 2 = 14 Marks)

This section contains short conceptual questions that require precise definitions.
Topics include:

Angle of friction & angle of repose

Assumptions and conditions of a truss

Resilience vs toughness

Characteristics of a couple

First law of thermodynamics

Carnot theorem

Centroid vs center of gravity

Parallel axis theorem

Varignon’s theorem

Fire tube vs water tube boilers

These questions check basic understanding and terminology.

SECTION – B (5 × 7 = 35 Marks)

This section contains medium-length theory questions and numerical problems.
Students must answer any five.

Topics include:

Working and major parts of a lathe machine

Equilibrium of cylinders on incline (force P required)

Reaction forces in truss members

Friction problem to find angle θ of impending motion

Reversible vs irreversible processes, boiler mountings & accessories

Working of 2-stroke & 4-stroke petrol engines with diagrams

Carnot engine driving a refrigerator: efficiency & COP

Kelvin–Planck and Clausius statements of second law

This section tests mechanics, thermodynamics, machine tools, friction, and engine fundamentals.

SECTION – C (2 × 10.5 = 21 Marks)

Any two long descriptive questions must be attempted:

Moment of inertia

Finding centroidal moment of inertia of a composite shaded area.

Engineering materials

Classification of materials

Difference between hot working and cold working

Definitions

Important engineering terms:

Entropy

Zeroth law

Brake power

Cone of friction

Latent heat

This section evaluates deep understanding, explanation skills, and problem-solving.