Jadavpur University 2006 B.E Mechanical Engineering MATHEMATICS-VM - Question Paper

Ex/ME/T/21F/44/2008
INTER ENGG. (MECHANICAL) EXAMINATION, 2008
(1st Semester)
MANUFACTURING PROCESSES
Time : 3 hours Full Marks : 100
Attempt maximum Ten ques..
GROUP–A
ans any 4 ques..
1. What is a trend ? What allowances are given in a
trend ? What is double shrinkage allowance ? discuss
with an example. 2+3+2+3=10
2. discuss the desired properties in a molding sand. How clay
acts with the molding sand in presence of water ? Why and
where core print is used ? Why a heavy metal placed on
the top of the mold before pouring ? 3+2+2+3=10
3. What is match plate trend ? How a cope and drag trend
various form a match plate trend ? discuss lost wax
process with its advantages and limitations. 2+3+5=10
4. What is directional solidification ? explain the sequential
steps for the design of a gating system. What is gating
ratio ? provide 1 example for pressurized and nonpressurized
gating ratio. 3+3+2+2=10
[ TURN OVER ]
14. a) Draw a neat sketch of a Resistance Welding set-up.
b) Write down the applications of Ristance seam welding
process. 5+5=10
15. Write short notes on : 2½×4=10
a) Thermit Welding
b) Forge Welding
c) Friction Welding
d) Diffusion Welding
—————×—————
( four )
( two ) ( three )
[ TURN OVER ]
5. Write short notes on : (any 4 ) 2½×4=10
a) Blast Furnace
b) Cokeless Cupola
c) Electric Arc Furnace
d) Modulus of Casting and Riser
e) Non-Destructive Testing
f) Vertual Casting
6. explain various kinds of casting defects due to
(a) appropriate melting (b) appropriate trend equipment. What
factors are responsible for the selection of any melding
process ? explain in detail. 2+2+(3+3)=10
GROUP–B
ans any 3 ques..
7. describe Latice Structure. What is packing factor ? discuss
B.C.C., F. C. C. and H. C. P. crystal structure with
necessary sketches. 2+2+6=10
8. a) explain various metal working processes used in
Industry.
b) discuss with neat sketches.
(i) Deep drawing
(ii) Piercing 5+5=10
9. elaborate the effect of extrusion die angle on drawing force
during extrusion. discuss with necessary diagram and
sketches ? 4+6=10
10. a) Draw a neat sketch of a 2 high rolling mill. Mention
angle of bite, draft and rolling forcess and neutral point
during rolling.
b) explain forging defects commonly occur during closed
die forging. 6+4=10
11. Write short notes on : 2½×4=10
a) Upsetting
b) Backward extrusion
c) Limit of forging
d) Blanking
GROUP–C
ans any 3 ques..
12. a) discuss Electric Arc Welding process with necessary
sketches.
b) elaborate the advantages and applications of Carbon Arc
Welding process ? 6+4=10
13. Write down the advantages and disadvantages of TIG &
MIG Welding processes. 10

Earning:   Approval pending.