SUB: PRODUCTION
TECHNOLOGY
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MODEL PAPER – 1
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Answer
any TWO questions from PART – A
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PART
– B is compulsory
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PART-A
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1
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a) What are
the advantages of investment casting?
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[2M]
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b) Name the
important factors in selecting sand for molds.
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[3M]
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c) What is
weldability?
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[2M]
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d) Write the
common uses of brazing process.
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[3M]
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e) Sketch the
various weld joints.
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[2M]
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f) Why is
metal cold worked?.
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[3M]
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g) Define
extrusion process.
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[2M]
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h)
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Define “ shot
peening”.
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[3M]
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i)
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Sketch a
blanking die and label it properly.
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[2M]
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j) Write a
short note on isothermal forging.
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[3M]
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PART-B
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2
(a) What are the criteria to be used for
designing the pouring basin? Discuss briey.
(b)
What are split and multi piece patterns?
What are the advantages of making them in two or more pieces? Give examples.
(c)
What is the necessity of sand testing ?.
OR
3
(a)
What
is permeability and why is it important in molding sands?
(b)
What are the advantages, disadvantages
and limitations of casting process?
(c)
Write
the advantages of cupola.
4.
(a) Explain various resistance welding
processes?
(b)
Write about gas welding equipment.
(c) Write steps to be taken in brazing process.
OR
5
(a)
Define
electric arc welding.
(b)
How does the seam welding differ from
spot welding ?.
(c)
Write
briefly on “ Testing and
Inspection of welded joints “.
6
a) Explain how Oxy-acetylene torch can
be used for both welding and cutting?
(b)
What does a thermit mixture consists of
and what reactions take place in thermit welding?.
OR
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7
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a)
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Distinguish
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between hard
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solder and soft solder.
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b)
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Write on “
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oxy acetylene
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flame
cutting”.
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c)
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What are the applications of induction welding ?.
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8
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(a)
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Explain the
extrusion processes and what are the controlling parameters?
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Name and
discuss them in brief?
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(b)
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Differentiate
between forward and backward extrusion.
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c)
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What is roll
forging and how it is done?.
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OR
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9
a) Distinguish between friction in hot
rolling and cold rolling.
(b)
Explain briey re-crystalization and
grain growth in hot rolling?
c)
Define the process of mechanical working of metals.
10 a) Compare open and
closed die forging.
c)
Define extrusion ratio.
OR
11 a) Describe what occurs in metal when it is
rolled. b) What are the applications of impact extrusion ?.
PART- A
1
a) Define Slush Casting.
b) What is the function of a riser
in casting process?.
c)
What are the different methods of
welding?.
d)
What
are the functions of coatings on shielded electrodes ?.
e)
What is ultrasonic welding ?.
f)
Define solid state welding.
g)
Define “slab”.
h)
What is a billet ?.
i)Define “
forgeability”.
j) What are the
applications of forging ?.
PART- B
2
(a) Discuss the Chvorinov'rule and Cains
rule for determining the riser size?
(b)
What are the factors which govern the
choice of a particular type of pouring technique?
c) Write the steps in casting
process.
OR
3
) With the help of suitable diagrams
discuss the following casting methods.
(a)
True-Centrifugal casting
(b)
Semi Centrifugal casting
(c)
Centrifugal Casting.
4. a) What are the various brazing methods ?. b) List
the applications of soldering.
c) Explain the effect of various materials on
weldability. OR
5
a) Explain laser welding with a neat
sketch.
b)
Write about diffusion welding.
c)
Define forge welding.
6
a) What are various types of weld defects.
b)
Describe how is the dye penetrant test carried ?.
c)
Explain stud welding.
OR
7 a) Classify the welding processes.
b)What are the functions of coatings in welding?.
c) write a note on welding positions.
8a) What
are the various rolling defects?.
b) Brief the rolling process with a neat
sketch.
c) What is recrystallisation temperature ?.
OR
9a) What are basic forging operations?. \
b) Define drop forging.
c)Write the advantages of rotary forging.
10 (a) Explain briey the
theory of work hardening?
(b) Explain the process of tube - producing through
rolling process? OR
11 a) Explain the types
of extrusion process.
b)
Discuss about wire and rod drawing.
c)
What are the various variables in drawing process?.
PAPER -3 PART- A
1a) How is the
choice of casting done?.
b)
Explain crucible furnae.
c)
What
is leftward welding technique?.
d)
What
is MIG welding?.
e)
What metals can be welded in explosive welding?.
f)
Define rolling process.
g)What is the importance of coding of electrodes ?.
h)What are the drawbacks of extrusion?.
i)
Define tube drawing
j)
Define metal spinning.
Part- B
2
(a) How a hot chamber die casting di_ers
from cold chamber die casting?
(b)
What are the advantages of investment
casting?
(c) What are thevarious defects in casting?. OR
3 (a)
Sketch a graph of specific volume Vs Temperature for a metal that shrinks as it
cools from the liquid state to room temperature. On graph, mark the area where
shrinkage is compensated for by risers?
(b)
What do you mean by blind riser?.
(c)
What are the various design aspects in
casting?.
4
(a) What three basic types of current
and polarity are used in arc welding?
(b)
What is the di_erence between a
consumable and non consumable
electrode?For which process does a filler metal have
to be added by a separate mechanism. OR
5
(a) Why do properties vary widely in
most welding heat affected zones?
(b)
With the help of a neat sketch explain
the metal inert gas welding process.
(c) What are the various methods of testing welds?.
6
(a) What are the materials used for
electrodes? What are their functions?
(b)
What is arc blow? What are the measures
to be taken to avoid arc blow?
(c)
Write
a short note on solid state welding.
OR
7(a) What are the
materials used for electrodes? What are their functions?
(b) What is arc blow? What are the measures to be
taken to avoid arc blow? 8 (a) Derive an expression for the forces acting on
metal during rolling.
(b)
Explain the function of planetary hot
rolling process?
(c)
Explain thread rolling.
OR
9 (a) What
is cold heading process ?.
(b)
Classify
the forming processes.
(c) Describe
the function of progressive die. 10(a) Explain strain hardening process.
(b)List out the forging operations.
(c)
Classify the forging presses.
OR
11(a) Explain a closed-die-forging operation in
comparison to open-die-forging? Dis-cuss the main advantages of forging over
casting (or) welded parts?
(b) List the advantages of forging of metals? Why is
press forging preferred over hammer forging processes?
PART-A
1. a) What are the various types of castings?
b) What is the importance of riser in casting process?
c) Define Welding?
d) Mention the applications of ultrasonic welding?
e) What are the elements of rolling process?
f) What is the difference between hot rolling & cold rolling?
g) Define recrystalization temperature?
h) Mention the forces of rolling?
i) List out forging defects?
j) What is forward extrusion?
PART-B
2. a) What is master pattern?
b) Write the
equations for the master pattern?
OR
3. a) Explain casting defects?
b) What is difference between casting & forging?
4. a) Explain ultrasonic welding?
b) How the weld rods are coded?
OR
5. a) What is difference between TIG & MIG?
b) Explain X-ray testing of welds?
6. a) Derive an expression for power
requirement for in hot working process?
b) Write a short note on hot spinning?
OR
7. a) Draw the difference between wire drawing & tube drawing?
b) What are pressure tools used in hot working of metals?
8. a) Define soldering process?
b) What is the difference between soldering & brazing?
OR
9. What are the various types of Brazing process?
10. Classify the forging operations?
OR
11. Explain any three forging defects?
PART-A
1.
a) Define gating in casting process?
b)
Write about pattern allowances?
c)
Write a short note on SMAW?
d)
What is plastic welding?
e)
What is DPT?
f)
What is arc welding?
g) What
are the elements of forging process? h)What are the types of Extrusion process?
i)
Define swaging?
j)
Mention the forces in forging?
PART-B
2. a)
Explain solidification of castings? b) Define machining elements?
c) What is the
use of match box pattern? OR
3.
a) Define founadry practice?
b)
Draw the layout of a foundary shop?
c)
List out foundary tools?
4.
a) Explain friction welding process?
b)
What is the difference between spot
welding & seam welding?
c)
What is atomic hydrogen welding? OR
5.
a) What is reverse polarity?
b)
Discuss about the remedies of weld
defects?
c)
What are the applications of thirmit
welding?
6.
a) What is heat effected zone in
welding?
b)
Explain radiography testing of welds? OR
7.
a) Explain ultrasonic testing of weld
joints?
b)
Suggest any welding method for joining
aluminum sheets?
8.
Write short notes on:
a)
Stamping
b)
Forming
c) Blanking OR
9.
Explain the following
a)
Rolling process
b)
Forging process
c)
Types of dies
10.
a) Explain any two forging hammers?
b)
Explain backward extrusion?
c)
Types of swaging? OR
11. 6
mm thick aluminum alloy strip is rolled to a thickness of 5 mm, using steel
Rollers of radium 90mm. The tensile yield stress at aluminum is 0.28 KN/ mm2.
Assuming a rolling speed of 30 m/min. Determine:
(a)
The roll separating forces.
(b)The
power required for the rolling operation, Assume width of the strip is 200mm.
Neglect strain hardening?
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