(SEM III) THEORY EXAMINATION 2019-20 MATERIALS ENGINEERING

This document is the B.Tech SEM–III Theory Examination 2019–20 question paper for Materials Engineering (Sub Code: KME303) under Dr. A.P.J. Abdul Kalam Technical University (AKTU).
The uploaded file contains two pages and is clearly divided into three sections — SECTION A, SECTION B, and SECTION C.
The total marks are 100, and the exam duration is 3 hours.

The paper evaluates the student’s understanding of crystallography, miller indices, material defects, heat treatment, phase rule, phase reactions, steel treatments, HSS constituents, alloying purposes, Fe–C diagram, TTT diagram, austempering, and compositions of industrial alloys.

SECTION A — Short Questions (10 × 2 = 20 Marks)

(Shown on Page 1)

Section A contains ten 2-mark questions, each focused on basic material science concepts.
Topics include:

Definition of unit cell

Drawing planes for Miller indices (111) & (101)

Difference between ductile vs brittle fracture

Difference between NDT (Non-Destructive Testing) and DT (Destructive Testing)

Gibb’s phase rule

Invariant reaction and eutectic reaction

Difference between annealing vs normalizing

Quenching mediums in decreasing order of cooling rate

Constituents of HSS (High Speed Steel) and their purpose

Uses of copper and aluminium

These questions test fundamental definitions and the ability to recall basic metallurgical knowledge.

SECTION B — Long Questions (Attempt Any 3 × 10 = 30 Marks)

(Located at the bottom of Page 1)

Students must attempt any three out of five 10-mark questions.
Topics include:

Types of imperfections in crystals

Plastic deformation & dislocation mechanisms

Phase diagrams & alloy classification

Heat treatment processes

Properties and selection of engineering materials

These require descriptive understanding, diagrams, and explanation.

🔹 SECTION C — Applied / Diagram-Based Questions (Q5, Q6, Q7)

(Appears on Page 2)

Section C contains three major questions (Q5, Q6, Q7), each with two alternatives (a or b).
Students must answer ONE from each pair.

Q5 — Fe–C Diagram / Eutectic vs Eutectoid

(From Page 2)

(a) Draw the Fe–C equilibrium diagram and explain:

Phase transformations

Critical points

Information obtained from the diagram

(b) Difference between Eutectic and Eutectoid phase diagrams with suitable examples.

Q6 — TTT Diagram / Austempering & Martempering

(Page 2)

(a) Draw a TTT diagram and explain:

Its importance

Applications in heat treatment

(b) Short note on Austempering and Martempering, including purpose and advantages.

Q7 — Alloying & Engineering Alloys

(Page 2)

(a) Purpose of alloying steels + different types of steels & their applications

(b) Composition and applications of brass and bronze

These questions require diagrams, heat treatment curves, and alloy compositions.

OVERALL SUMMARY OF THE DOCUMENT

The Materials Engineering (KME303) exam paper evaluates the student’s understanding of:

Crystal structure & Miller indices

Material defects (point, line, surface)

Ductile vs brittle fracture behavior

Non-destructive vs destructive testing

Phase rule & invariant reactions

Heat treatment processes (annealing, normalizing, quenching)

HSS steel constituents

Fe–C phase diagram

TTT diagram & transformation behavior

Austempering & martempering

Composition & applications of common alloys (brass, bronze, aluminium, copper)

The structure follows the AKTU pattern:

SECTION A: Quick conceptual recall

SECTION B: Detailed theory questions

SECTION C: Diagram-based & applied metallurgy questions

All questions are presented clearly across two pages.