AKTU Materials Engineering · Important Questions 2026Source: ryzenstudy.com PYQs
BME303 Materials Engineering Important Questions 2026 (AKTU)
Repeat analysis + most-asked questions, unit-wise
What we did: built from all 4 AKTU Materials Engineering papers (2021-22–2025-26): 92 questions grouped into 61 distinct questions, 21 of which were asked in more than one paper.
- of marks were repeat questions
- 44%
- of marks were repeat questions
- questions asked in 2+ papers
- 21
- questions asked in 2+ papers
- papers analysed (2021-22–2025-26)
- 4
- papers analysed (2021-22–2025-26)
- units, mapped to current syllabus
- 5
- units, mapped to current syllabus
How much of the paper repeats?
- Repeats are real: when we checked each newer BME303 paper against the papers before it, on average 44% of its marks were questions already asked in an earlier paper.
- 2023-24 paper: 59% of marks were repeats (8 of 13 repeated questions were in our top list).
- 2025-26 paper: 29% of marks were repeats (3 of 7 repeated questions were in our top list).
- Topic weightage is a guide, not a guarantee: our Tier 1 + Tier 2 topics covered 51% of the next paper's marks — picking the same number of topics at random would have covered about 52%.
Across 10 subjects and 23 papers we tested, 43% of marks repeated earlier questions on average.
1.Unit-wise most-asked questions
Ranked by how many papers asked them, then by how recently. Click a paper to open it.
Unit 1: (08 Lecture) Crystal Structure · Imperfection in solids
17% of past marks| Question | Asked |
|---|---|
| What is a dislocation? Differentiate between line and interfacial defects. | Asked 2× |
| Classify the defect in crystal and explain point defect in detail with neat sketch. | Asked 2× |
| Define unit cell in crystal structure. | Asked 2× |
| Define toughness and resilience. How is toughness measured from a stress-strain curve? 7 marks2025-26 Q2(a) | Asked 1× |
Unit 2:
22% of past marks| Question | Asked |
|---|---|
| Draw and explain the Fe–Fe₃C phase diagram. Highlight important phase transformations and critical temperatures. | Asked 4× |
| What is solid solution? Enlist types of solid solution and explain it. | Asked 2× |
| Explain Degree of Freedom used in Phase Diagram. | Asked 2× |
| What is High Speed Steel (HSS)? Discuss its composition, properties, and applications in cutting tools. | Asked 1× |
Unit 3:
21% of past marks| Question | Asked |
|---|---|
| What is the purpose of alloying in steel? What are the two common alloying elements in steel and their effects? | Asked 3× |
| Explain the properties of titanium alloys. Why are they preferred in aerospace and biomedical applications? | Asked 2× |
| Explain in detail stainless steel and tool steel. | Asked 2× |
| Describe cast iron. Also explain carbon fiber and its properties. | Asked 2× |
Unit 4:
20% of past marks| Question | Asked |
|---|---|
| Draw and explain the isothermal transformation (TTT) diagram for Fe–C alloys. Discuss the microstructures obtained at different cooling rates. | Asked 3× |
| Explain the term heat treatment and its objective. | Asked 3× |
| Differentiate between normalizing and annealing. When these processes are required? | Asked 2× |
| Explain Case Hardening? Mention its types. | Asked 2× |
Unit 5:
19% of past marks| Question | Asked |
|---|---|
| Discuss the working principle and applications of Magnetic Particle Inspection (MPI) and Ultrasonic Testing (UT) with suitable diagram. Enlist their advantages and disadvantages? | Asked 2× |
| Differentiate between ductile failure and brittle failure. Also explain fracture mechanism with neat diagram. | Asked 2× |
| Define the term fatigue strength. | Asked 2× |
| Name the various types of Static Failure Theories. Explain any one in detail. | Asked 2× |
2.Topic weightage: which topics carry the marks
Blue = Tier 1 + Tier 2 (topics that carried ~80% of past marks). Grey = the rest. It shows where marks have gone, not a promise of what comes next.
Annealing, normalising, tempering · U4
8.1% (cum 8%)
Fracture & failure theories · U5
7.6% (cum 16%)
Alloys & solid solutions · U2
6.8% (cum 23%)
Iron-carbon diagram · U2
6% (cum 29%)
Stainless & tool steels · U3
5.3% (cum 34%)
Case hardening · U4
5.1% (cum 39%)
Crystal defects · U1
5% (cum 44%)
Unit cells & crystal structures · U1
4.5% (cum 48%)
Non-destructive testing · U5
4.5% (cum 53%)
TTT diagrams · U4
4.5% (cum 57%)
Superalloys & titanium · U3
4.4% (cum 62%)
Phase diagrams & lever rule · U2
4% (cum 66%)
Elastic & plastic properties · U1
4% (cum 70%)
Stress-strain curves · U1
3.8% (cum 74%)
Fatigue & S-N curve · U5
3.8% (cum 77%)
Carbon fibre & composites · U3
3.7% (cum 81%)
Alloying of steel · U3
3.2% (cum 84%)
Cast irons · U3
2.8% (cum 87%)
High speed steel · U2
2.8% (cum 90%)
Creep · U5
2% (cum 92%)
Fe-C microconstituents · U2
1.8% (cum 94%)
Copper alloys · U3
1.8% (cum 95%)
Flame & induction hardening · U4
1.5% (cum 97%)
Cryogenic & high-temp behaviour · U5
1.3% (cum 98%)
Cooling curves & austempering · U4
1.2% (cum 99%)
Invariant reactions · U2
0.7% (cum 100%)
| Topic | Papers | Share |
|---|---|---|
| Annealing, normalising, tempering · Unit 4 · Tier 1 | 4/4 | 8.1% |
| Fracture & failure theories · Unit 5 · Tier 1 | 3/4 | 7.6% |
| Alloys & solid solutions · Unit 2 · Tier 1 | 3/4 | 6.8% |
| Iron-carbon diagram · Unit 2 · Tier 1 | 4/4 | 6% |
| Stainless & tool steels · Unit 3 · Tier 1 | 3/4 | 5.3% |
| Case hardening · Unit 4 · Tier 1 | 4/4 | 5.1% |
| Crystal defects · Unit 1 · Tier 1 | 4/4 | 5% |
| Unit cells & crystal structures · Unit 1 · Tier 1 | 4/4 | 4.5% |
| Non-destructive testing · Unit 5 · Tier 1 | 3/4 | 4.5% |
| TTT diagrams · Unit 4 · Tier 2 | 3/4 | 4.5% |
| Superalloys & titanium · Unit 3 · Tier 2 | 3/4 | 4.4% |
| Phase diagrams & lever rule · Unit 2 · Tier 2 | 3/4 | 4% |
| Elastic & plastic properties · Unit 1 · Tier 2 | 2/4 | 4% |
| Stress-strain curves · Unit 1 · Tier 2 | 3/4 | 3.8% |
| Fatigue & S-N curve · Unit 5 · Tier 2 | 3/4 | 3.8% |
| Carbon fibre & composites · Unit 3 · Tier 2 | 2/4 | 3.7% |
| Alloying of steel · Unit 3 · Tier 3 | 3/4 | 3.2% |
| Cast irons · Unit 3 · Tier 3 | 2/4 | 2.8% |
| High speed steel · Unit 2 · Tier 3 | 1/4 | 2.8% |
| Creep · Unit 5 · Tier 3 | 2/4 | 2% |
| Fe-C microconstituents · Unit 2 · Tier 3 | 1/4 | 1.8% |
| Copper alloys · Unit 3 · Tier 3 | 1/4 | 1.8% |
| Flame & induction hardening · Unit 4 · Tier 3 | 1/4 | 1.5% |
| Cryogenic & high-temp behaviour · Unit 5 · Tier 3 | 1/4 | 1.3% |
| Cooling curves & austempering · Unit 4 · Tier 3 | 2/4 | 1.2% |
| Invariant reactions · Unit 2 · Tier 3 | 1/4 | 0.7% |
3.Paper pattern (2025-26)
| Section | Questions | Rule |
|---|---|---|
| A | 7 × 2 marks | Attempt all |
| B | 5 × 7 marks | Attempt any 3 |
| C | 10 × 7 marks | Attempt any 1 |
4.In the syllabus, never asked yet
Low priority, but read them once — a new paper can always start here.
- Slip & dislocation strengthening · U1
- Hardness tests · U1
- Aluminium alloys · U3
5.Study order
- 1Annealing, normalising, tempering (Unit 4, Tier 1)
- 2Fracture & failure theories (Unit 5, Tier 1)
- 3Alloys & solid solutions (Unit 2, Tier 1)
- 4Iron-carbon diagram (Unit 2, Tier 1)
- 5Stainless & tool steels (Unit 3, Tier 1)
- 6Case hardening (Unit 4, Tier 1)
- 7Crystal defects (Unit 1, Tier 1)
- 8Unit cells & crystal structures (Unit 1, Tier 1)
- 9Non-destructive testing (Unit 5, Tier 1)
- 10TTT diagrams (Unit 4, Tier 2)
- 11Superalloys & titanium (Unit 3, Tier 2)
- 12Phase diagrams & lever rule (Unit 2, Tier 2)
- 13Elastic & plastic properties (Unit 1, Tier 2)
- 14Stress-strain curves (Unit 1, Tier 2)
- 15Fatigue & S-N curve (Unit 5, Tier 2)
- 16Carbon fibre & composites (Unit 3, Tier 2)
FAQ
Which units of BME303 carry the most marks?
Unit 2 (, 22% of past marks) and Unit 3 (, 21% of past marks).
Do AKTU Materials Engineering questions repeat?
Yes. On average 44% of the marks in each newer BME303 paper came from questions already asked in an earlier paper, and 21 questions have appeared in more than one paper.
How is this list made?
Every question from the 4 papers (2021-22–2025-26) was mapped to the current AKTU syllabus and grouped with the same question from other years. Questions are ranked by how many papers they appeared in, then by how recently.
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Note: this is based on past AKTU papers, not a guarantee. Questions are mapped to the current syllabus; topics that are no longer in the syllabus are left out.