JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech II METALLURGY AND MATERIAL SCIENCE Previous Question Paper (April/May - 2018 - R16)
Note: This question paper contains two parts A and B. Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b, c as sub questions.
PART - A
Differentiate between crystallize ceramics and cermets.
Answer
Crystalline ceramics consist entirely of inorganic, non-metallic compounds with a regular atomic structure. Cermets are composite materials consisting of ceramic particles or fibers bonded together by a metallic matrix, combining the hardness of ceramics with the toughness of metals.
What is congruent melting intermediate phase?
Answer
A congruent melting intermediate phase is a compound that transforms directly from a solid state into a liquid state of the same composition at a specific temperature, without undergoing any decomposition or change in chemical composition during melting.
Define composite.
Answer
Sign in to view the complete answer paper.
Define allotropy and give examples.
Answer
Sign in to view the complete answer paper.
Differentiate between annealing and normalizing.
Answer
Sign in to view the complete answer paper.
Explain why grain boundaries look darker under the microscope, while the grains look brighter.
Answer
Sign in to view the complete answer paper.
Which alloy of Fe-Fe3C system has the lowest melting point?
Answer
Sign in to view the complete answer paper.
Differentiate between spheroidal graphite cast Iron & gray cast Iron.
Answer
Sign in to view the complete answer paper.
Differentiate between hardness and hardenability.
Answer
Sign in to view the complete answer paper.
What are α-Stabilizers in titanium alloys?
Answer
Sign in to view the complete answer paper.
PART - B
What is the effect of grain boundaries on the properties of metal & Alloys?
Answer
Sign in to view the complete answer paper.
Distinguish between Metallic bond and chemical bond.
Answer
Sign in to view the complete answer paper.
State Hume-Roothery’s rules for the formation of substitutional solid solution.
Answer
Sign in to view the complete answer paper.
Differentiate between metal and alloy.
Answer
Sign in to view the complete answer paper.
What is phase rule, Lever rule and cooling curve.
Answer
Sign in to view the complete answer paper.
What is Isomorphous alloy system explain with suitable example.
Answer
Sign in to view the complete answer paper.
Draw and explain TTT Diagrams.
Answer
Sign in to view the complete answer paper.
Explain about chemical case hardening techniques.
Answer
Sign in to view the complete answer paper.
Write explanatory notes on Annealing, Normalizing, Hardening and Tempering.
Answer
Sign in to view the complete answer paper.
Differentiate between construction of TTT curves and Phase diagrams.
Answer
Sign in to view the complete answer paper.
Write explanatory notes on:
Copper and its Alloys
Answer
Sign in to view the complete answer paper.
Aluminium and its Alloys.
Answer
Sign in to view the complete answer paper.
Enumerate the characteristics, properties and applications of Titanium alloys.
Answer
Sign in to view the complete answer paper.
Write Short notes on:
Metal ceramic mixtures
Answer
Sign in to view the complete answer paper.
C-Composites.
Answer
Sign in to view the complete answer paper.
Write short notes on:
Polymers
Answer
Sign in to view the complete answer paper.
Ceramics.
Answer
Sign in to view the complete answer paper.