FellowBuddy.com is an innovative platform that brings students together to share notes, exam papers, study guides, project reports and presentation for upcoming exams. We connect Students who have an understanding of course material with Students who need help. Benefits:- # Students can catch up on notes they missed because of an absence. # Underachievers can find peer developed notes that break down lecture and study material in a way that they can understand # Students can earn better grades, save time and study effectively Our Vision & Mission – Simplifying Students Life Our Belief – “The great breakthrough in your life comes when you realize it, that you can learn anything you need to learn; to accomplish any goal that you have set for yourself. This means there are no limits on what you can be, have or do.” Like Us - https://www.facebook.com/FellowBuddycom

1. B.Tech. VI Sernester(Main) Examination.May -June 2015
Mechanical Engineering
6ME2A: Newer Machining Methods
N
t+,-J
f-.
Fi
o
Time : 3 Hours Maximum Marks
Min. Passing Marks
Instructions to Cundidates:
Attempt any five questions, selecting one question from each unit. All
questions carty equal tnarks. (Schematic diagrams must be shown wherever
.necessary. Any data you feel missing suitably be assumed and stated clearly.
l-Jnits of quantities used/calculated must be stated clearly.
Unit - I
1. a) Justify the neecl of advanced machining process in today's industries (8)
b) Distinguish between conventional and unconventional manufacturing processes
(8)
OR
Explain the Hybrid machining processes.
Explain the Magnetic abrasive finishing (MAF) processes.
Unit - il
2. a) if suppose Ultra Sonic machining (USM) is used for drilling a hole (under the
same machining conditions) in aluminium and cast Iron.Which one will have
:80
:24
(8)
(8)
1. a)
b)
higher depth of the drilled hole and why?
b) Explain the functions of 'Florn' in USM. What do you understand by,
'transducer' And' magnetostriction effects' ?
OR
2. a) Sketch and explain-the schematic diagram of abrasive Jet rnachining. Why
different abrasives produce different MRR.
(8)
(8)
(8)
6E 70121 zarc (1) [Contd....

2. (b) Describe the working principle of Water Jet machining process aiong with its
applications?
Unit - IIT
.,i:
3. a) What are the requirements for the tool material for EDlv{rlDiscuss various
tooi Materials. (8)
b) Discuss the main functions and types of dielectric fluids used in the electrical
discharge machining. (8)
(8)
b) List the product applications of electron beam machining (EBM). Why EBM
process is performed usually in vacuum chamber?Explain. (8)
(16)
(8)
(8)
OR
3. a) Discuss the principle of laser beam machining; aiso discuss its process capa
bilities and applications.
Unit-tV
4. Describe the working principie of Electro-Chemical machining (ECM) processes
along with its advantages, disadvantages and applications?
OR
4. a) What are the different functions of electrollte in ECM? List the common
electrolytes used in ECM. (S)
b) Calculate the rnachining rate and the electrocie feed rate when iron is
eiectrochemically machined (ECM), using copper electrode and sodium
chloride solution (specific resistance : 5.0 ohm cm). The power suppiy
data of the ECM used are:
Supply voltage:18 V d.c.
Cun'ent :5000 amp
A 'tool-work' gap of 0.5rnm (constant) may be assumed.
6E 7012 (2)

3. 5. a)
b)
5. a)
b)
t, -:l,Unit-V',t'.'-,'i,
Distinguish between Micro-machining and Nano-machining .
Describe the working principle of Micro-grinding process along
advantages?
OR
What are the benefits and applications of laser Micromachining .
Write the applications ofNano-machining and Micro-machining in industry.
(8)
(8)
with its
(8)
(8)
68 7012 (3)