Materials Engineering (BME303) - AKTU Question Paper 2025-26
B.Tech · Semester 3 · Free PDF Download
This is the official AKTU Materials Engineering Previous Year Question Paper for B.Tech Semester 3, academic session 2025-26. Published by Dr. A.P.J. Abdul Kalam Technical University (AKTU/UPTU), Lucknow. Free PDF download — no login required.
Course:B.Tech
Semester:Semester 3
Session:2025-26
University:AKTU / UPTU
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Questions Asked in 2025-26
Materials Engineering (BME303) — complete question paper · 70 marks · 3 Hours
Section AAttempt all q u e s t i o n s i n b r i e f . 02 x 7 = 14
- aDefine Hooke’s law in its general ized form? What is the differ ence between engineering stress and true stress?
- bWhat is a dislocation? Differen tiate between line and interfacial defects
- cDefine and explain the eutect ic reaction with an example
- dWhat is the purpose of alloying in steel? What are the two com mon alloying elements in steel and their effects
- eHow does a TTT diagram help i n predicting microstructure?
- fDifferentiate between normalizi ng and annealing. When these pr ocesses are required
- gDefine creep?What are the differ ent factors influence creep rate?
Section BAttempt any three o f t h e f o l l o w i n g : 07 x 3 = 21
- aDefine toughness and resilience?How is toughness measured fr om a stress- strain curve?
- bWhat is High Speed Steel ( HSS) and where is it used?
- cWhat is carbon fiber and why is it used in composites? What makes carbon fiber-based composites most suitable for different applications
- dExplain the process principl es of flame and induction harden ing. Name some applications
- eWhat is the difference between X-ray diffraction and radiography? Explain the process principle of X-ray diffraction used in NDT
Section CAttempt any one p a r t o f t h e f o l l o w i n g : 07 x 1 = 07
- aDefine Young’s modulus. Diffe rentiate between engineering st ress-strain and true stress-strain curves. Derive the relation between stress-strain
- bDescribe the common metallic crystal structures (FCC, BCC, H CP). Compare their packing efficienc y, coordination number, and exam ples of metals exhibiting these structures
- aDraw and explain the Fe–Fe₃C phase diagram. Highlight import ant phase transformations and critical temperatures
- bWhat is High Speed Steel (HSS) ? Discuss its composition, pro perties, and applications in cutting tools
- aExplain the characteristics of tool steels. How do alloying elements improve hardness, wear resistance, and toughness?
- bExplain the properties of titan ium alloys. Why are they pref erred in aerospace and biomedical applications?
- aDraw and explain the isotherm al transformation (TTT) diagram for Fe–C alloys. Discuss the microstructures obtained at different cooling rates
- bDescribe cyaniding and carbo-nitriding. How do they differ i n terms of diffusion elements and applications?
- aDiscuss the working principle and applications of Magnetic P article Inspection (MPI) and Ultrasonic Testing (UT) with suitable gram.Enlisttheir advantages and disadvantages?
- bHow do metals behave at very low temperatures? Explain the e ffect of cryogenic temperatures on materi al properties. Discuss ductile- to-brittle transition temperature with examples
Question text is extracted from the official AKTU question paper PDF above. Hindi translations are omitted — every question is printed in English in the original paper. Last verified: 2026-08-23.
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