Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU) B-Tech 5th Semester (Fifth Semester) 2015-2016 Manufacturing Science Technology Ii Nme 503 Question Paper
(Following Paper ID and Roll No. to be ?lled in your
Answer Book)
Roll No.
B. Tech.
(SEM. V) THEORY EXAMINATION, 2015-16
MANUFACTURING SCIENCE & TECHNOLOGY?II
[Time:3 hours] [Maximum Marks:100l
SECTION-A
Note : All questions are compulsory
1. Attempt all parts .All parts carry equal marks. Write
answer ofall part in short . (2x10=20)
(a) Describe the cutting tool temperature.
(b) Discuss the conditions due to which discontinuous
chips produced in metal cutting.
(c) What are the carbide cuttingtool materials and its
applications ?
(d) What is an abrasive ? What are its types and
characteristics ?
(e) Write short note on hybrid machinin g processes.
5
21500 (1) P.T.O.
(0 Bring out the differences between orthogonal and
oblique cutting.
(g) Differentiate between normal, oxidizing and
carburizing ?ames.
(h) Explain the mechanics ofmaterial removal in ECM
process.
_ " (i) What is meant by brazing ? How does it differ from
soldering ??
0) Why Schaef?er diagram is used ?
SECTION-B
Note: Attempt any ?ve questions from this section.(10x5=50)
2.
21500 (2)
What are the cutting ?uids ? Discuss various properties
ofcutting ?uids used during machining.
What are the main differenees between a shaper and
planer ? Discuss the different drive mechanisms used in
shaper with the help of suitable diagram".
Explain three different ways in which the wear of grinding
wheel takes place. What can be done to prevent them?
Differentiate Dressing and T ruing.
What are various types ofarc welding power sources ?
Give the advantages and limitations ofeach.
NME-503
Explain with neat sketches-Resistance welding &
submerged arc welding.
How are grinding wheels speci?ed ? Clearly differentiate
between grade and structure of a grinding wheel ?
De?ne ?aw, roughness and waviness to characterize
surfaces. Show surface pro?le for a rough, lapped and
finished object.
What is the purpose of reaming? Explain the process of
Honing Lapping Claddig.
SECTION-C
Note:Attcmpt any two questions from this section. (15x2=30)
10.
11.
Discuss the various criteria used for optimizing the
cutting conditions. A cylindrical bar is to be turned. The
maximum allowable feed is 0.2mm/revolution and at this
feed rate Taylor?s tool life equation for a tool work
combination is found to be VT)?: 55. The labor cost
involved in each regrinding if the tool is Rs 7.0. On the
average, it takes about 3 minutes to change the tool. F ind
the cutting speed that will lead to maximum production
rate. Drive the formula used.
How are non-conventional machining processes
different from conventional machining processes ?
Write brief notes on all of the following :
21500 (3) P.T.O.
(i) Abrasivejet machining (AJM)
(ii) Advantages ()I?EBM over USM
(iii) Plasma arc welding
12. Draw Merchant?s force circle diagram and develop
expression for power required in metal cutting and derive
Merchant?s shear angle relationship.
_x_
21500 (4) NME-503
This post was last modified on 29 January 2020