|
WINTER -2006
FUNDAMENTALS OF DESIGN AND MANUFACTURING
(AN 201/AD 301)
Answer FIVE questions, taking ANY TWO from Group A,
ANY TWO from Group B and ALL from Group C.
Group A
Q.1 (a) Explain the term ‘design’. Enumerate the various steps
involved in design process. Explain these in brief. (2+2+4)
(b) Distinguish clearly the terms ‘Need Identification’, ‘Need
Statement’ and ‘Need Analysis’. (2+2+2)
(c) Explain ‘creativity’ and ‘creative process’. Explain why
one should not have mental set to become creative.(3+3)
Q.2 (a) What do you mean by ‘standards of performance’?
Enumerate the factors affecting this. Explain these factors
in brief. (2+2+4)
(b) What do you understand by specifications? At what stage
these should be defined during the process of
product development? Explain. (2+1+3)
(c) Explain ‘Evaluation’ and ‘Evolution’ in the design
process. (3+3)
Q.3 (a) Explain ‘Morphological approach’. Enumerate the phases
of morphology of design. Explain these in brief. (2+3+3)
(b) Describe the methods of achieving reliability. Compare
the reliability of systems with components in series and
components in parallel. (3+3)
(c) How will you organize and communicate the design?(3+3)
Q.4 (a) Write down the objectives of design for manufacturing,
Enumerate the points to be observed while designing for
‘Casting’ and ‘Easier Machining’? (2+3+3)
(b) Name the sand moulding methods. Describe these in brief
with the help of figures. What is directional solidification?
(2+3+2)
(c) Explain permanent mould casting processes. (5)
Group B
Q.5 (a) With the help of figures, explain the following for a single
Point cutting tool: (i) Rake angle, (ii) clearance angle,
(iii) Cutting angle, (iv) Nose Radius and (v) Tool signature
(1x5)
(b) Name different types of chips. Explain their formation.
What is chip breaker? (2+4+2)
(c) Describe the working of a drilling machine. What
Specifications are needed to purchase this machine.(5+2)
Q.6 (a) What is surface grinder? Under what conditions the use of
This machine is recommended? (4+2)
(b) Describe, with a neat sketch, the working principle of
Electro chemical machining. State its applications. What is
Electrolyte and explain its role? (4+2+2)
(c) What are the advantages of welding joint over other joints?
Explain oxy-acetylene gas welding procedure. (2+4)
Q.7 (a) Discuss the application of the following in manufacturing
(i) group technology, (ii) simulation (iii) database
management. (2+2+2)
(b) In the present business scenario, the integration of
commercial, economic and technological aspects is
essential. Justify the statement. (8)
(c) Discuss the application of the information technology in
the integration of business and technological aspects.(6)
Q.8 (a) Explain the available better features in ‘computer aided
Process planning (CAPP)’ over the ‘conventional process
planning approach.’ How does CAPP help in selection of
machine tools? (6+2)
(b) Describe the role of integration of ‘product’ and ‘process
design’ for economic manufacturing. (6)
(c) What for an ‘automated guided vehicle (AVG)’ is used?
Describe the role of sensors in controllers. (3+3)
Group C
Q.9 (A) Explain the following in brief: (2x6)
(i) Economic feasibility and utility
(ii) Permanent Mould Casting
(iii) Tool- work interaction (iv) System concept
(v) Robots (vi) Recyclability.
(B) Select the correct answer out of the alternative choices
Of the following: (1x8)
i) Cores are used to
a) make desired recess in castings
b) strengthen moulding sand
c) support loose pieces d) remove pattern easily
ii) Shell moulding process requires
a) wooden patterns b) sand patterns
c) plastic patterns d) metal patterns
iii) In arc welding, eyes need to be protected against
a) intense glare
b) infra-red rays only c) ultraviolet rays only
d) both infra-red and ultraviolet rays
iv) The gases used in tungsten inert gas welding are
a) hydrogen and oxygen b) argon and helium
c) argon and neon d) helium and neon.
v) Laser is produced by
a) graphite b) emerald
c) ruby d) diamond.
vi) Production of contours in flat blanks is termed as
a) blanking b) piercing
c) perforating d) punching.
vii) For ferrous materials, the helix angle of drill is taken as
a) 30° b) 45°
c) 60° d) 90°.
viii) The front rake required to machine brass by HSS tool is
a) 15° b) 10°
c) 5° d) 0°.
---------------------------------------------------------------------------------------
WINTER -2006
MATERIALS SCIENCE AND ENGINEERING
(AN 202/AD 302)
Answer FIVE questions, taking ANY TWO from Group A,
ANY TWO from Group B and ALL from Group C.
Group A
Q.1 (a) Define: Metallic bonding, covalent bonding; Orthorhombic
And Tetragonal crystals structures with examples in each
case. (4x1)
(b) What is the chemical formula of an intermetallic
compound which consists of 49.2 wt% Cu and 50.8 wt% ?
Cu=64, Au=197 (4)
(c) Copper has a FCC crystal structure and a unit cell with
lattice constant of 0.361nm.What is the interplaner
spacing of d111 planes? Show one prism plane (101¯ 0)
and [21¯ 1¯ ] direction of HCP lattice. (2+2)
(d) Explain polymorphism and allotropy with example.(2+2)
(e) Using the zone theory, explain the mechanism for
conductivity of copper. (4)
Q.2 (a) Define phase, Isomorphous system, phase rule, Monotectic
Reaction. (4x1)
(b) How do you explain the solubility of silver in gold? (4)
(c) Calculate the degree of freedom of the Peritectic reaction
in Fe-C system. What is the degree of freedom at the
gamma-loop? (2+2)
(d) For a 1-1 % carbon steel, why are annealing and
normalizing temperatures different? Calculate the % of
phases present at room temperature of the annealed
1-1% carbon steel. (2+2)
(e) What is Pearlite? What is the maximum solubility of ‘c’
in ferrite? How does it differ with Bainite? (2+2)
Q.3 (a) Define hardness and hardenabilty, explaining their
difference. (4)
(b) Why is hardenabilty of alloy steel better than C-steel?
Distinguish between lathe martensite & plate martensite.
(2+2)
(c) What are Ms and Mf temperatures? Discuss the factors
that determine the temperatures. (2+2)
(b) Distinguish between slip and twining, with examples.(4)
(e) Explain Hall-Petch equation and its relevance. (4)
Q.4 (a) Define (any two): Cross slip, Frank-Read source,
Bauschinger’s effect, Lomer-Cottrel Barrier. (4)
(b) Derive the relationship between Engineering Strain and
True Strain, Engineering Stress and True Stress. (6)
(c) Draw engineering Stress-strain curve for indicating
Important points :(i) Grey Cast Iron, (ii)Mild Steel(only
nature should be given). (4)
(d) Why are ceramics brittle in general?
Distinguish between glass and ceramics. (3+3)
Group B
Q.5 (a) Draw a standard creep curve and explain its sections.(4)
(b) Explain the development of fatigue crack growth
mechanism. (4)
(c) What are cryogenic materials? Show how ductile to
Brittle transition zone determines its applicability. (2+2)
(d) A copolymer consists of 15 wt% polyvinyl acetate
(PVA) and 85 wt% polyvinyl chloride (PVC).Determine
the mole fraction of each component. (4)
(e) Calculate the radius of the largest interstitial void in the
FCC lattice, If it occurs at the (1/2, 0, 0) position. The
Radius of the atom is to be taken as R. (4)
Q.6 (a) Define: Homopolymer, Degree of Polymerization,
Thermosetting Plastic, Elastomer. (4)
(b) Explain with applications: Nylon 6.6, PMMA,
ABS, Neoprene. (4x2)
(c) A unidirectional fibre-epoxy composite contains 60% by
volume fibres and 40% epoxy resin. The density of fibres
is 1.48 mg/m3 and that of the epoxy resin is 1.20 mg /m3.
Calculate the weight percentages of fibre and epoxy resin
in the composite material . If the young’s modules of the
fibre is 400 GPa and that of epoxy resin matrix is 50 GPa,
determine the young’s modulus of the composite, assuming
rule of mixtures to hold good. (4)
d). In a tension test, the engineering stress and engineering
strain were found to be 500 MPa and 0.5 , respectively.
Calculate the true stress and true strain. (4)
Q.7 (a) Define curie temperature, P-N junction, permeability,
diamagnetism. (4)
b). Explain the hysteresis loop and its importance in regard to
soft and hard magnets. (4)
c).What is metallic glass? Explain the cause for difference in
its mechanism of deformation compared to that of metallic
single crystals. (2+2)
d). what is strain hardening? Name one application where it is
advantageous and one application where it is problematic.
e). Derive the expression per the critical resolved shear stress
for slip in a single crystal (4)
Q.8 (a).Distinguish between octahedral interstitial sites and
tetrahedral interstitial sites. (4)
b).What are nanomaterials? Give two unique properties of
nanomaterials explaining the cause. (4)
c).Distinguish between thermosetting and thermoplastic
polymers. (2+2)
d). State the properties promoting creep resistance and name
two high temperature materials widely used. (2+2)
e). State the Griffith theory of fracture? What modifications is
required for application to aluminum ? (4)
Group C
Q.9 Answer the following questions. (10 x 2)
a). Find the atomic packing factor in case of FCC Crystals .
b). If the lattice parameter of alpha iron is 286 pm (Pico meter),
what is its atomic radius.
c). Calculate the number of atoms per zinc crystal structure unit
cell
d). Draw schematics stress and strain curve for perfectly elastics
and visco-elastic solid.
e). Explain how point defect concentration of a metal depends on
temperature?
f). Why does a composite having aluminum as matrix and SiC
fibres as reinforcement differ in properties compared to that
having same volume fraction of SiC particles .
g). What is difference between diamagnetism and ferromagnetism.
h). How is thermal shock resistance of materials related to thermal
conductivity and co-efficient of thermal expansion.
i).Give two reasons for surface hardening of structural components
j). In a tension test, gauge diameter = 10mm, gauge length = 50mm
and the maximum load reported as 3000 kgf. What will be
ultimate tensile strength?
--------------------------------------------------------------------------------------------------------
WINTER -2006
SOCIETY AND ENVIRONMENT
(AN 204/AD 304)
Answer FIVE questions, taking ANY TWO from Group A,
ANY TWO from Group B and ALL from Group C.
Group A
Q.1 (a) DO you agree with the statement that sociology is the
study of social relationship? (6)
(b) Discuss the social characteristics of primary and
secondary groups with suitable examples. (8)
(c) Define the concept of social conformity, variation
and deviance. (6)
Q.2 (a) Explain the concept of social stratification. How it is
related to mobility? (5)
(b) Discuss the impact of social change. (5)
(c) Differentiate between Custom and Tradition. (5)
(d) Discuss the relationship of sociology and psychology.(5)
Q.3 (a) What do you mean by social conflict? (5)
(b) Is social inequality is a result of class, caste and
occupation? (5)
(c) Do you agree that information technology has improved
our effectiveness at workplace? (5)
(d) Discuss the advantages of joint family system. Why
it is disintegrating today? (5)
Q.4 (a) What are the major factors responsible for social
development? How it has been influenced by economic
environment? (7)
(b) What is Planning? Do you think that five years plans
have met their objectives. (7)
(c) What is appropriate technology? How can we identify
appropriate technology for rural population? (6)
Group B
Q.5 (a) What is greenhouse effect? State its effects briefly. (6)
(b) What is Bio-sphere cycle? (6)
(c) What are the causes of ecological imbalance? How it
can be prevented? (8)
Q.6 (a) What do you mean by environmental degradation?
What are its causes? (8)
(b) How noise pollution effect our health? (6)
(c) What can be done to protect ozone layer? (6)
Q.7 (a) Differentiate between aforestation, deforestation and
reforestation. (5)
(b) ‘Use of plastic should be banned’. Do you agree with
this statement. (5)
(c) Discuss the role of Pollution Control Board in protecting
the environment. (5)
(d) What can be done to stop the discharge of industrial
waste into our rivers? (5)
Q.8 (a) What can be done to minimize the waste from agricultural
products? (5)
(b) What are sources of alternate energy? (5)
(c) What do you understand by the term sustainable
development? (5)
(d) What is the role of engineers in effective disposal of waste
In urban areas? (5)
Group C
Q.9 (A) Write the full forms of the following: (5)
(a) SAARC
(b) WAN
(c) NDA
(d) RITES
(e) UPSC
(B) Name the authors of the following books: (5)
(a) Origin of Species
(b) A Passage of England
(c) Wake up India
(d) The wonder that Was India
(e) Mother
(C) Name the authors of the following books: (5)
(a) Aurobindo Ghosh
(b) Rajendra Prasad
(c) V.V.Giri
(d) Zakir Hussain
(e) Sarojini Naidu
(D) Match the following columns for deceases: (5)
Column I Column II
(a) Airbrone (1) Tetanus
(b) Waterbrone (2) Tuberculosis
(c) Contact (3) Cholera
(d) Wound (4) Syphilis
|
