This document is the B.Tech Semester III Theory Examination Question Paper for Materials Engineering (KME303) under AKTU (Dr. A.P.J. Abdul Kalam Technical University) for the academic session 2020–2021. The exam carries 100 marks and the duration is 3 hours.
The uploaded question paper contains exactly three sections:
SECTION A — Short Questions (10 × 2 = 20 Marks)
Section A includes ten short-answer questions, each carrying 2 marks. These questions test the basic fundamentals of materials engineering. Topics include:
Strain hardening
Frenkel and Schottky defects
Theoretical density of copper
Critical resolved shear stress
Classification of carbon steels
Solubility of carbon in austenite vs. ferrite
Hardenability
Lever rule
Cold vs. hot working
Classification of copper alloys
This section checks whether the student understands the core definitions and basic concepts of materials science.
SECTION B — Long Descriptive Questions (Any 3 × 10 = 30 Marks)
This section contains five detailed questions, from which students must attempt any three.
The questions require explanations, diagrams, and conceptual clarity.
Topics include:
Ductile vs. brittle fracture and effect of dislocations
Pb–Sn phase diagram and eutectic reaction explanation
Phase diagram construction for insoluble metals and alloy solidification
Heat treatment of plain carbon steels (annealing, normalizing, etc.)
Brass, Bronze, Muntz metal, Nickel alloy steels, and Maraging steels
This section evaluates deeper understanding and application of materials engineering principles.
SECTION C — Numerical / Analytical / Diagram-Based Questions (Any 5 × 10 = 50 Marks)
Section C contains five 10-mark questions, and students must attempt any five.
This is the largest section of the paper and includes:
Screw dislocations, Burgers vector, and slip mechanism
Griffith theory of brittle fracture and difference between ductile & brittle failure
Binary eutectic phase diagram: drawing, composition calculation, microstructure
TTT diagram of steels with explanation of transformation zones
Production of wrought iron in puddling furnace and effect of alloying elements
This section includes derivations, microstructure explanations, diagrams, and analytical reasoning.
Overall Summary
This Materials Engineering exam paper evaluates a student's knowledge in:
Crystal defects & strengthening mechanisms
Phase diagrams (Pb–Sn, eutectic diagrams)
Iron–Carbon system overview
Heat treatment processes
Mechanical behavior of materials
Failure theories (ductile/brittle fracture)
Alloy classification and processing
The paper is structured to test:
Basic understanding (Section A)
Deep theoretical knowledge (Section B)
Analytical, diagram-based, and descriptive understanding (Section C)
The uploaded question paper contains only these 3 sections, and the description above matches the document exactly.
