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

Roll No.

Total No. of Pages : 04

Total No. of Questions : 09

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B.Tech.(AE) (2011 Onwards) (Sem.-3)

MACHINE DRAWING

Subject Code : BTAE-306

M.Code: 54114

Time: 3 Hrs.

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Max. Marks : 60

INSTRUCTIONS TO CANDIDATES :

1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and student has to attempt any TWO questions.

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SECTION-A

1. Write briefly :
   1. Sketch the conventional representation of :
      1. Wood
      2. Concrete
      3. Brass

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   2. Define the terms: Diagonal Pitch and margins in case of rivets
   3. Sketch the conventional representation of
      1. Internal threads
      2. Bearing
      3. Tension spring
      4. Helical gear.

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   4. How are (i) Screw threads and (ii) Tapered features, dimensioned?
   5. State the difference between pitch and lead of a double start thread.
   6. Draw a free hand sketch of hexagonal threaded bolt.
   7. Enlist the practical applications of pin type flexible coupling.

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   8. What is a half section?
   9. What is the function of piston in an IC engine?
   10. 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

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2. Explain blow off cock with the help of a diagram.
3. Discuss the following commands of AutoCAD :
   1. Array
   2. Offset
   3. Extrude
   4. Trim

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   5. Mirror
4. Differentiate between machine drawing and production drawing.
5. Draw profile of 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.

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SECTION-C

7. Sketch a Knuckle joint showing sectional front view and top view for connecting two rods of 40 mm diameter.
8. Fig. 1 shows the two views of a protected type flanged coupling. Draw the following views on full scale :
   1. Front view lower half in section
   2. Side view

   Shaft A 1-OFF

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   Bolts 40-off

   Fiange A 1-OFF

   FIG.1

   Nuts 4-OFF

   Flange B 1-OFF

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   Shaft B 1-OFF

9. Fig. 2 shows the details of a screw-jack. Draw the following views of the assembly to some suitable scale :
   1. Front view-right half in section, and
   2. Top views

   Casting (1)

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   12 Set screw

   Washer

   Cup

   FIG.2

   Nut 2

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   Screw 3

   Tommy bar 7

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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