About this previous year paper
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.