GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-III (NEW) EXAMINATION — SUMMER 2019
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Subject Code: 2133405 Date: 18/06/2019
Subject Name: Manufacturing and Assembly Drawing
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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MARKS
Q.1 (a) What is the importance of surface roughness? 03
(b) Draw the conventional representation of Bevel gear, worm gear and spur gear 04
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(c) Draw the conventions for the following: i) Internal Thread ii) Chain 07 Wheel iii) Conical Helical Spring with Rectangular section iv) Diamond Knurling v) Spiral Spring Unwound vi) Bevel Gear vii) Leaf Spring without eye.
Q.2 (a) What is meant by direction of lay? 03
(b) Differentiate between tolerance and allowance 04
(c) Explain Ra Value and Roughness Grade Number. Also give 07 symbols for roughness grade
OR
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(c) Explain GD & T and list out the symbols with neat sketches 07
Q.3 (a) Define Steel. 03
(b) Explain Unilateral and Bilateral Tolerance with an example each 04
(c) Explain and compare “Hole basis system” and “Shaft basis system” 07 of fits. From manufacturing point of view which system is preferred? Why?
OR
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Q.3 (a) Draw the Surface roughness symbols for Roughness values Ra 03 0.025µm and 0.4µm.
(b) Write short notes on Datum and Datum features. 04
(c) Explain fit and classify its types with neat sketches. 07
Q.4 (a) List the standard parts of an two plate Injection Mould Base 03
(b) Explain positive and negative allowance. 04
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(c) Write short-notes on 1) Aluminium and its alloys ii) Nickel and its 07 alloys.
OR
Q.4 (a) Define Ferrous and Non-Ferrous Metals and give example of each 03
(b) What is production drawing of a component? What information 04 must be provided on production drawing of a machine to facilitate its manufacturing and assembly?
(c) Explain the effect of alloying on Mn, Si, Cr and Mo. 07
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Q.5 (a) What are the basic principles of dimensioning in production 03 Drawing ?
(b) Explain what do you mean by B.O.M . Draw a sample B.O.M 04
(c) Draw the symbols for (i) Square Butt weld, (ii) Single Bevel Butt 07 weld, (iii) Single U Butt weld, (iv) Single J Butt weld, (v) Fillet weld, (vi) Spot weld, (vii) Plug weld
Q.5 The figurel shows parts of a tail stock. Assemble the parts and 14 Draw the sectional front view of tail stock
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This download link is referred from the post: GTU BE 2019 Summer Question Papers || Gujarat Technological University
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