Indian Institute of Technology Roorkee (IIT-R) 2008 B.E Manufacturing Processes and Automation Engineering Mid-Term of MI-102: Manufacturing Techniques - Question Paper

Department of Mechanical and Industrial Engineering
Indian Institute of Technology, Roorkee
(Spring Semester, 2007-08)

Standard Solution of Mid-Term exam of MI-102: Manufacturing Techniques

Date: seventh April 2008 (Monday) Max. Time: 60 Min. Max. Marks: 60


Q. 1: describe nano materials and mention their characteristics and
applications. [1 + two + 1]

explain various aspects of manufacturability according to kind of work
materials for metals, polymers, and ceramics. [2 x three = 6]


Q. 2: discuss the 3 important Functions of a Gating System. [3]

describe permeability of the molding sand. discuss briefly the method to measure
it. explain briefly effects of grain shape and size of sand particles on sand
permeability. [1 + two + 4]

Q.3: define 5 various kinds of trend allowances. [1 x 5]

Mention the functions of: Sprue, Vents, Chaplets, Chill, and Parting Sand.
[1 x 5]

Q.4: Name various methods used in plastics parts manufacturing. [4]
1. Extrusion
2. Injection Molding
3. Blow Molding
4. Rotational Molding
5. Thermoforming
6. Compression Molding
7. Transfer Molding
8. Casting
9. Structural Foam Molding

discuss injection molding process with the help of suitable figure. [6]


Q. 5: Differentiate ranging from autogeneous, homegeneous, and heterogeneous
joining methods. [3]

discuss straight and reverse polarity with reference to arc welding along with
their applications. [2 + 2]


Q. 6: Write the chemical reactions that take place in the oxy-acetylene gas
welding process. [2]

Mention the causes and remedies of the subsequent welding defects: Slag Inclusions,
Incomplete Penetration, Cracks, Residual Stresses [2 x four = 8]

Earning:   Approval pending.