JNTU
JNTU B.Tech II METALLURGY AND MATERIALS SCIENCE Previous Question Paper (April/May - 2018 - R13)
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.
Part A
Differentiate between crystallize ceramics and cermet’s.
Answer
Crystalline ceramics are inorganic, non-metallic materials composed of ordered atomic structures. Cermets are composite materials consisting of ceramic particles (hard phase) bonded together by a metallic matrix (binder phase) to combine 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 melts directly into a liquid of the same composition as the solid phase, without undergoing any decomposition or change in composition during the melting process.
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.
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.
Metal ceramic mixtures
Answer
Sign in to view the complete answer paper.
C-Composites.
Answer
Sign in to view the complete answer paper.
Polymers
Answer
Sign in to view the complete answer paper.
Ceramics.
Answer
Sign in to view the complete answer paper.