(SEM IV) THEORY EXAMINATION 2021-22 MATERIAL SCIENCE
SECTION A — Short Descriptive Paragraph Required
asks basic concepts like lever rule, carbon solubility, sherardizing, TTT vs CCT diagrams, carbon steel types, HSS composition, annealing vs normalizing, steel types with carbon %, superconductivity, and composite materials.
Each answer should be one small paragraph that clearly explains the concept.
Extra sample questions:
Explain eutectoid reaction in steel in 4–5 lines.
Describe the meaning of martensite formation briefly.
Explain edge and screw dislocation in a short paragraph.
SECTION B — Medium Descriptive Paragraph Required
contains descriptive questions on iron-carbon diagram, TTT curve, yielding & yield strength, stress-strain diagrams, importance of materials, and ceramic properties.
Each answer must be one full paragraph explaining diagram points, phases, or behaviour of materials.
Extra sample questions:
Explain hardenability of steel in one descriptive paragraph.
Describe creep behaviour of materials briefly.
Explain powder metallurgy process in clear sentences.
SECTION C — Long Description Paragraph Required
contains long questions such as Hume-Rothery rules, etching, Pb-Sn diagram, austempering & martempering, strain hardening, hardness testing methods, semiconductor band theory, magnetism types, composite materials classification, and BH curve.
These answers must be written as one long paragraph, explaining steps, rules, diagrams, or behaviour in detail.
Extra sample questions:
Explain nucleation and growth during solidification in a long paragraph.
Describe various strengthening mechanisms in materials.
Explain ductile-to-brittle transition temperature with example.
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