B.Tech-COMPUTER SCIENCE AND ENGINEERING 1st Sem MANUFACTURING PROCESS(Guru Gobind Singh Indraprastha Vishwavidyalaya, Delhi-2009)

Q1

• Explain the following types of sand:

•                1.Facing sand 3. System sand
•                2. Backing sand 4. Parting sand

• Why does the section of sprue reduce downwards? 3
• What is the importance of permeability in molding sands? 2
• Imagine a gating system without a riser. How does it affect the casting? 2

Q2

• What is the difference between hot chamber and cold chamber die casting? Explain one process with suitable diagrams. 8
• Explain centrifugal casting? How are the centrifugal casting methods classified? 3
• Why is the mold in permanent mold casting preheated? 4

Q3

• Define "forgeability". On what factors does it depend? 3
• Write short notes on swages, tongs and flatters used in a forging shop. 4
• What is upset forging and how is it done? 4
• How are a forging hammer and drop hammer alike and how do they differ? 5

Q4

• Sketch and explain the working of an engineer's try square? 6
• What are the advantages of a twist drill over flat drill? 4
• What is the significance of accurate marking? 3
• What is the difference between a mallet and a hammer? 2

Q5

• Describe hems and seams used in sheet metal work. 6
• Explain the utility of various allowances for making components by sheet metal work. 3
• Differentiate between piercing, punching and blanking. 6

Q6

• With the help of neat sketches explain the "spot welding method". 5
• Sketch the two polarities of DC supply and compare these for welding process. 4
• What is the purpose of coating on an arc welding electrode? 3
• Sketch the three types of flames used in oxy-acetylene. Gas welding give the uses of each. 3

Q7 write short note on any three of following:-

• Various edge preparations used for welding joints. 3x5
• Difference between welding, soldering and brazing.
• Types of files.
• Binders used in molding sand.



Earning:  ₹ 4.00/-