Download Visvesvaraya Technological University (VTU) BE ( Bachelor of Engineering) ME (Mechanical Engineering) 2015 Scheme 2020 January Previous Question Paper 4th Sem 5MEB405 Machine Tools and Operations
C
? I3
\: -
(31
1 Pit 5MEB405
* L. R,.:V.R y
Fourth Semester B.E. Degree Examination, Dee:244-91jan.2020
Machine Tools and Operations
Time: 3 hrs. Max. Marks: 80
Note: Answer any FIVE full questions, choosing ONE full question from each module.
Module-1
1 a. What are machine tools? Briefly explain the types of Lathe. (08 Marks)
b. Differentiate any 8 differences between centre, turret and capstan lathes. (08 Marks)
OR
2 a. What is milling? Explain horizontal spindle column and knee type milling machine.
(08 Marks)
b. Define Grinding. With a neat sketch explain centreless grinding machine. (08 Marks)
Module - 2
3 a. What machining operations can be performed on Lathe, explain any 4 with neat sketch.
(08 Marks)
b. Explain with a neat sketch, the process of
(i) Broaching (ii) Grinding
(iii) Tapping (iv) Threading (08 Marks)
OR
4 a. With a neat sketch explain
(i) Form milling (ii) Slot milling
(iii) Gang milling (iv) AngUlar milling (08 Marks)
b. With a neat sketch explain any 4 operations that can be performed on Drilling machine.
c?
t s 7,
-
(08 Marks)
Module-3
5 a. List and explain any four types of cutting tool materials. (08 Marks)
0 ?
tf.)
b. What are cutting fluids, list the functions and types of cutting fluids. (08 Marks)
? ?
DI)
=.
E
G
>
fV
6 a.
b.
OR
Briefly explain the terms and Angles of a single point cutting tool. (08 Marks)
What is surface finish? List and discuss the factors affecting surface finish. (08 Marks)
0
z
Module-4
CD
7 a. With a neat sketch, compare between Oblique and Orthogonal cutting. (08 Marks)
C
b. With a neat diagrain, explain the Basic elements of machining. Explain two different types
of chip formation.
(08 Marks)
oft
FirstRanker.com - FirstRanker's Choice
USN
C
? I3
\: -
(31
1 Pit 5MEB405
* L. R,.:V.R y
Fourth Semester B.E. Degree Examination, Dee:244-91jan.2020
Machine Tools and Operations
Time: 3 hrs. Max. Marks: 80
Note: Answer any FIVE full questions, choosing ONE full question from each module.
Module-1
1 a. What are machine tools? Briefly explain the types of Lathe. (08 Marks)
b. Differentiate any 8 differences between centre, turret and capstan lathes. (08 Marks)
OR
2 a. What is milling? Explain horizontal spindle column and knee type milling machine.
(08 Marks)
b. Define Grinding. With a neat sketch explain centreless grinding machine. (08 Marks)
Module - 2
3 a. What machining operations can be performed on Lathe, explain any 4 with neat sketch.
(08 Marks)
b. Explain with a neat sketch, the process of
(i) Broaching (ii) Grinding
(iii) Tapping (iv) Threading (08 Marks)
OR
4 a. With a neat sketch explain
(i) Form milling (ii) Slot milling
(iii) Gang milling (iv) AngUlar milling (08 Marks)
b. With a neat sketch explain any 4 operations that can be performed on Drilling machine.
c?
t s 7,
-
(08 Marks)
Module-3
5 a. List and explain any four types of cutting tool materials. (08 Marks)
0 ?
tf.)
b. What are cutting fluids, list the functions and types of cutting fluids. (08 Marks)
? ?
DI)
=.
E
G
>
fV
6 a.
b.
OR
Briefly explain the terms and Angles of a single point cutting tool. (08 Marks)
What is surface finish? List and discuss the factors affecting surface finish. (08 Marks)
0
z
Module-4
CD
7 a. With a neat sketch, compare between Oblique and Orthogonal cutting. (08 Marks)
C
b. With a neat diagrain, explain the Basic elements of machining. Explain two different types
of chip formation.
(08 Marks)
oft
1 5NI FA5B/1 5 M E B405
OR
8 a. By the help of Merchant's circle diagram derive expressions to calculate all forces.
(08 Marks)
b. In an orthogonal cutting process the following data were obtained:
Chip length obtained = 96 mm Uncut chip length = 240 mm
Rake angle used = 20? Depth of cut = 0.6 mm
Horizontal component of cutting force = 2400 N
Vertical components of cutting force = 240 N.
Calculate for the given data:
(i) Shear plane angle (ii) Chip thickness
(iii) Friction Angle (iv) Resultant cutting force
M od u le-5
9 a. Explain the different tool wear mechanisms.
b. What is tool failure? Explain the types of tool failures.
(08 Marks)
(08 Marks)-
(08 Marks)
?
OR
10 a. What is tool life? Explain the factors affecting the tool life. (08 Marks)
b. The following equation for tool life is given for a turning operation VT
?.13
r
7
d
37
= C at
V = 30 m/min, f = 0.30 mm/rev and depth of cut d = 2.5 mm. Calculate the change in tool
life if the cutting speed, feed, depth of cut are increased by 25% individually and also taken
together.
(08 Marks)
2 of 2
FirstRanker.com - FirstRanker's Choice
This post was last modified on 02 March 2020