PTU B.Tech Automobile Engineering 3rd Semester May 2019 54114 MACHINE DRAWING Question Papers

PTU Punjab Technical University B-Tech May 2019 Question Papers 3rd Semester AE-Automobile-Engineering

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Roll No.
Total No. of Pages : 04
Total No. of Questions : 09
B.Tech.(AE) (2011 Onwards) (Sem.?3)
MACHINE DRAWING
Subject Code : BTAE-306
M.Code : 54114
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
1.
SECTION-A is COMPULSORY consisting of TEN questions carrying T WO marks
each.
2.
SECTION-B contains FIVE questions carrying FIVE marks each and students
have to attempt any FOUR questions.
3.
SECTION-C contains T HREE questions carrying T EN marks each and student
has to attempt any T WO questions.




SECTION-A
1.
Write briefly :

a) Sketch the conventional representation of :


(i) Wood


(ii) Concrete


(iii) Brass

b) Define the terms: Diagonal Pitch and margins in case of rivets

c) Sketch the con www.FirstRanker.com
ventional representation of


(i) Internal threads


(ii) Bearing


(iii) Tension spring


(iv) Helical gear.

d) How are (i) Screw threads and (ii) Tapered features, dimensioned?

e) State the difference between pitch and lead of a double start thread.
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f) Draw a free hand sketch of hexagonal threaded bolt.

g) Enlist the practical applications of pin type flexible coupling.

h) What is a half section?

i) What is the function of piston in an IC engine?

j) What is a cotter and when is it used? What is the purpose of using a gib along with a

cotter in a cotter joint?

SECTION-B
2.
Explain blow off cock with the help of a diagram.
3.
Discuss the following commands of AutoCAD :

a) Array

b) Offset

c) Extrude

d) Trim

e) Mirror
4.
Differentiate between machine drawing and production drawing.
5.
Draw profile of
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Knuckle threads by taking pitch of 20 mm. Clearly show the calculations
and show dimensions on drawing.
6.
Draw the sectional front view and top view of a double riveted zig-zag lap joint to join
plates of thickness 10 mm.
SECTION-C
7.
Sketch a Knuckle joint showing sectional front view and top view for connecting two
rods of 40 mm diameter.

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8.
Fig. 1 shows the two views of a protected type flanged coupling. Draw the following
views on full scale :

a) Front view lower half in section

b) Side view
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FIG.1

9.
Fig. 2 shows the details of a screw-jack. Draw the following views of the assembly to
some suitable scale :

a) Front view-right half in section, and

b) Top views
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FIG.2
NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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This post was last modified on 04 November 2019