(SEM-III) -THEORY EXAMINATION (2017-18) MANUFACTURING SCIENCE

This document contains the complete B.Tech Semester III – Theory Examination (2017–18) question paper for the subject Manufacturing Science (RME-301). The paper spans two printed pages, carries 70 marks, and evaluates a student’s understanding of engineering materials, heat treatment, crystal structures, phase diagrams, non-destructive testing, mechanical behavior, and metallurgical concepts.
 

Section A – Short Theoretical Questions (14 Marks)

Section A includes seven brief questions aimed at testing fundamental material science and manufacturing concepts. Topics include:

The Messier effect

Classification of solids based on energy gaps

Definition and examples of composite materials

Eutectic and eutectoid reactions

Meaning and formula of packing efficiency

Definition of Miller indices

Explanation of the Gibbs phase rule

These questions check foundational knowledge of solid-state physics, materials characterization, and basic metallurgical principles.
 

Section B – Descriptive Questions (21 Marks)

Students must attempt any three out of five questions. This section focuses on descriptive explanations and classification:

Definition, example, properties, and applications of refractory materials

Difference between ferrous and non-ferrous materials

Classification of heat treatment processes, with emphasis on normalizing

Explanation of carburizing

Detailed classification of ceramics, including examples, properties, and applications

These questions test the student's ability to classify materials and explain their behavior, use, and processing.
 

Section C – Long & Analytical Problems (35 Marks Total)

Section C contains five main questions, each with two subparts. Students must attempt one part from each.

1. Crystal Structures & Testing Methods

Calculation of atomic packing factor (APF) for BCC and FCC lattices

Meaning of non-destructive testing (NDT) and explanation of any two NDT methods with examples

2. Crystal Imperfections & Phase Rule

Detailed explanation of defects and imperfections in crystals with sketches

Gibbs phase rule and its applications

3. Fracture Mechanics & Destructive Testing

Explanation of fracture, characteristics of brittle vs. ductile fracture

Meaning of degree of freedom, definition of destructive testing, explanation of tensile test with stress–strain curve of mild steel

4. Heat Treatment & Magnetic Materials

TTT diagram for eutectoid steel, effect of cooling rate on transformation and hardness

Difference between diamagnetic, paramagnetic, and ferromagnetic materials (properties & applications)

5. Phase Diagrams & X-Ray Diffraction

Iron–Carbon equilibrium diagram with neat sketch

Explanation of Bragg’s law and the X-ray diffraction method for determining crystal structure

These questions evaluate deeper understanding of metallurgical transformations, crystal geometry, failure analysis, testing techniques, and phase equilibria.
 

 Summary

This exam paper provides a comprehensive assessment of topics essential to Manufacturing Science, including:

Material classification & properties

Heat treatment & phase transformations

Crystallography & crystal defects

Non-destructive and destructive testing

Magnetic materials

Iron–carbon diagram & TTT diagram

X-ray diffraction & Bragg’s Law

It serves as a valuable academic resource for students studying materials science, metallurgy, and manufacturing engineering.