Download VTU BE 2020 Jan ME Question Paper 15 Scheme 4th Sem 5MEB405 Machine Tools and Operations

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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

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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

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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.

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(08 Marks)
b. Explain with a neat sketch, the process of
(i) Broaching (ii) Grinding
(iii) Tapping (iv) Threading (08 Marks)
OR

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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?

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t s 7,
-

(08 Marks)
Module-3

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5 a. List and explain any four types of cutting tool materials. (08 Marks)
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tf.)
b. What are cutting fluids, list the functions and types of cutting fluids. (08 Marks)
? ?

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E
G
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fV
6 a.
b.
OR
Briefly explain the terms and Angles of a single point cutting tool. (08 Marks)

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What is surface finish? List and discuss the factors affecting surface finish. (08 Marks)
0
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Module-4
CD

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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)

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1 Pit 5MEB405
* L. R,.:V.R y
Fourth Semester B.E. Degree Examination, Dee:244-91jan.2020

--- Content provided by‍ FirstRanker.com ---

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)

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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)

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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

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(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)

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b. With a neat sketch explain any 4 operations that can be performed on Drilling machine.
c?
t s 7,
-

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(08 Marks)
Module-3
5 a. List and explain any four types of cutting tool materials. (08 Marks)
0 ?
tf.)

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b. What are cutting fluids, list the functions and types of cutting fluids. (08 Marks)
? ?
DI)
=.
E

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G
>
fV
6 a.
b.

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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

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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

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of chip formation.
(08 Marks)
oft
1 5NI FA5B/1 5 M E B405
OR

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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

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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

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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)-

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(08 Marks)
?

OR
10 a. What is tool life? Explain the factors affecting the tool life. (08 Marks)

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b. The following equation for tool life is given for a turning operation VT
?.13
r
7
d

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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.

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(08 Marks)
2 of 2
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