Production Technology - May 2016
Mechanical Engineering (Semester 8)
TOTAL MARKS: 100
TOTAL TIME: 3 HOURS (1) Question 1 is compulsory.
(2) Attempt any four from the remaining questions.
(3) Assume data wherever required.
(4) Figures to the right indicate full marks. 1 (a) Compare Orthogonal and Oblique cutting.(7 marks) 1 (a) Explain tool designation for single point cutting tool with neat sketch. Discuss the importance of different tool angles.(7 marks) 2 (a) Prove that: tan φ=r cos α/(1-r sin α)(7 marks)
Solve any one question from Q2(b) & Q2(c)
2 (b) In an orthogonal turning operation on a Lathe the following data were obtained: Cutting force = 120kg, Feed force = 30kg, Back rake angle = 15°, Feed rate = 0.2mm/rev., Chip thickness = 0.3 mm, Cutting speed = 100 m/min, Workpiece diameter=120 mm, Depth of cut = 0.4 mm. Calculate Chip thickness ratio, Shear angle, Friction angle and Coefficient of friction.(7 marks) 2 (c) Define tool life and explain the factors affecting it.(7 marks)
Solve any two question from Q3(a), Q3(b) & Q3(c), Q3(d)
3 (a) Differentiate between gear forming and gear generating methods(7 marks) 3 (b) How the Presses are classified? Explain the methods of reducing the force requirement in press work.(7 marks) 3 (c) Explain thread rolling process.(7 marks) 3 (d) Differentiate between a jig and a fixture. Explain C-clamp with figure.(7 marks)
Solve any two question from Q4(a), Q4(b) & Q4(c), Q4(d)
4 (a) List various principles of location and explain the 3-2-1 Principal of Location with neat sketches.(7 marks)
4 (b) Discuss the term:
(i) Fool proofing
(ii) Interchangeability.(7 marks) 4 (c) Describe combination die with neat sketch.(7 marks)
Discuss the term:
4 (d) (i) Center of pressure.(4 marks) 4 (d) (ii) Scrap strip Layout.(4 marks)
Solve any two question from Q5(a), Q5(b) & Q5(c), Q5(d)
5 (a) Classify various unconventional machining processes.(7 marks) 5 (b) Explain USM process with neat sketch.(7 marks) 5 (c) Compare the merits and demerits of Turret and Capstan lathes with a conventional engine lathe.(7 marks) 5 (d) What is transfer machine? List the essential component of a transfer machine and explain any two in detail.(7 marks)