STUPIDSID
Answer any one question from Q1 and Q2
1 (a)
Derive Schmidt's Law.
4 M
1 (b)
Explain the property and structural changes during cold working and annealing of metals.
4 M
1 (c)
What is work hardening or strain hardening ? Explain work hardening by theory of dislocation.
6 M
1 (d)
Draw neat sketches to show Planar defects.
4 M
2 (a)
Represent Miller indices for planes and directions for the following intercepts:
i) (1 1 0)
ii) (6 3 2)
iii) [1 1 0]
iv) [1 1 1]
i) (1 1 0)
ii) (6 3 2)
iii) [1 1 0]
iv) [1 1 1]
4 M
2 (b)
Calculate critical resolved shear stress of a single crystal if applied tensile stress is 25 kg/mm2. The slip plane is oriented at 30° to the tensile axis.
4 M
2 (c)
Differentiate between slip and twinning (any four points).
4 M
2 (d)
Define:
i) Atomic Packing Factor
ii) Co-ordination Number.
i) Atomic Packing Factor
ii) Co-ordination Number.
6 M
Answer any one question from Q3 and Q4
3 (a)
Explain the following mechanical properties with proper graphs:
i) Stiffness
ii) Ductility
iii) 0.2% Proof Stress.
i) Stiffness
ii) Ductility
iii) 0.2% Proof Stress.
6 M
3 (b)
Enlist the factors affecting Fatigue life.
4 M
3 (c)
?Even after destructive testing of metals and strict quality
control, the components fail in service.? Why?
6 M
4 (a)
Compare Brinell, Vickers and Rockwell Hardness Test with respect to:
i) Load applied
ii) Indenter used
iii) Formula.
i) Load applied
ii) Indenter used
iii) Formula.
4 M
4 (b)
Explain
i) Notch Sensitivity and
ii) Ductile to brittle transition temperature,
with respect to impact tests.
i) Notch Sensitivity and
ii) Ductile to brittle transition temperature,
with respect to impact tests.
4 M
4 (c)
Draw SN curve for ferrous and non-ferrous metals. Explain fatigue limit and fatigue strength.
4 M
4 (d)
Explain factors to increase creep strength of a metal.
4 M
Answer any one question from Q5 and Q6
5 (a)
Draw neat and labelled Iron-carbon equilibrium phase diagram. Explain the various phases existing in the diagram and the different transformation reactions.
8 M
5 (b)
What are the transformation products of Austenite. Explain martensitic transformation.
4 M
5 (c)
What is an alloy steel ? Give the classification of alloy steels.
4 M
Write short notes on (any two):
6 (a) (i)
High Speed Tool Steels.
4 M
6 (a) (ii)
Cemented Carbides.
4 M
6 (a) (iii)
Satellites.
4 M
6 (b)
Distinguish between steel and cast iron. (any four points):
4 M
6 (c)
Explain any one heat treatment used for Cast Iron.
4 M
Answer any one question from Q7 and Q8
7 (a)
What is critical cooling rate ? Explain critical cooling transformation (CCT) diagrams.
8 M
Explain the following (any two);
7 (b) (i)
Isothermal annealing.
3 M
7 (b) (ii)
Normalizing
3 M
7 (b) (iii)
Isoforming.
3 M
7 (c)
Differentiate between Liquid and Gas Carburizing.
4 M
8 (a)
What is hardenability? Draw standard Jominy hardenability test set-up. What are the factors to be considered to increase hardenability of steel?
8 M
8 (b)
What is retained Austenite? How is it eliminated?
4 M
8 (c)
Explain any two of the following:
(i) Nitriding
(ii) Induction Hardening
(iii) Flame Hardening.
(i) Nitriding
(ii) Induction Hardening
(iii) Flame Hardening.
6 M
Answer any one question from Q9 and Q10
9 (a)
Why is powder conditioning necessary? Explain in detail.
6 M
Explain the following characteristics of metal powder (any three):
9 (b) (i)
Particle Size
3 M
9 (b) (ii)
Particle Shape
3 M
9 (b) (iii)
Compatibility
3 M
9 (b) (iv)
Flow Rate.
3 M
9 (c)
What is LM Series? What do you mean by LM6 and
LM11?
4 M
10 (a)
Explain the significance of zinc in brasses.
4 M
10 (b)
What are the requirements of bearing material.
4 M
10 (c)
List the applications of powder metallurgical parts. Explain manufacturing of any one powder metallurgical component.
6 M
10 (d)
Explain Hot Compaction in Powder metallurgy.
2 M
Answer any one question from Q11 and Q12
11 (a)
How is malleable cast iron produced ? Justify, why cast iron cannot be rolled?
6 M
11 (b)
Explain Chilled Cast Iron with suitable example.
4 M
11 (c)
Explain the basic characteristics required to produce good composites. Give examples of any two composites.
6 M
Write short note on (any four):
12 (a)
High Temperature Metals
4 M
12 (b)
Low Temperature Metals
4 M
12 (c)
Diamond Impregnated Tools
4 M
12 (d)
FRP
4 M
12 (e)
Nanomaterials.
4 M
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