Guru Gobind Singh Indraprastha Vishwavidyalaya 2003 B.Tech ETME – 107 Subject : Manufacturing Processes - Question Paper

End-Term exam
First Semester [B.Tech] – December 2003

Paper Code : ETME – 107 Subject : Manufacturing Processes

Time : three Hours
Maximum Marks : 75

Note : Attempt any five ques. in all. provide freehand sketch where necessary.


Q1
( a )
discuss the subsequent kinds of sand:

Facing sand 3. System sand

Backing sand 4. Parting sand
8

( b )
Why does the part of sprue decrease downwards?
3

( c )
What is the importance of permeability in molding sands?
2

( d )
Imagine a gating system without a riser. How does it affect the casting?
2



Q2
( a )
What is the difference ranging from hot chamber and cold chamber die casting? discuss 1 process with suitable diagrams.
8

( b )
discuss centrifugal casting? How are the centrifugal casting methods classified?
3

( c )
Why is the mold in permanent mold casting preheated?
4



Q3
( a )
describe “forgeability”. On what factors does it depend?
3

( b )
Write short notes on swages, tongs and flatters used in a forging shop.
4

( c )
What is upset forging and how is it done?
3

( d )
How are a forging hammer and drop hammer alike and how do they differ?
5



Q4
( a )
Sketch and discuss the working of an engineer's try square?
6

( b )
elaborate the advantages of a twist drill over flat drill?
4

( c )
What is the significance of right marking?
3

( d )
What is the difference ranging from a mallet and a hammer?
2



Q5
( a )
define hems and seams used in sheet metal work.
6

( b )
discuss the utility of different allowances for making components by sheet metal work.
3

( c )
Differentiate ranging from piercing, punching and blanking.
6



Q6
( a )
With the help of neat sketches discuss the “spot welding method”.
5

( b )
Sketch the 2 polarities of DC supply and compare these for welding process.
4

( c )
What is the purpose of coating on an arc welding electrode?
3

( d )
Sketch the 3 kinds of flames used in oxy-acetylene. Gas welding provide the uses of every.
3



Write short notes on any 3 of the following:
Q7
( a )
different edge preparations used for welding joints.
three x 5

( b )
Difference ranging from welding, soldering and brazing.



( c )
kinds of files.



( d )
Binders used in molding sand.

Earning:   Approval pending.