FirstRanker.com
Firstranker's choice FirstRanker.com
Seat No.: Enrolment No.
--- Content provided by FirstRanker.com ---
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-VI(NEW) - EXAMINATION - SUMMER 2019
Subject Code:2161909 Date:16/05/2019
Subject Name:Production Technology
Time:10:30 AM TO 01:00 PM Total Marks: 70
--- Content provided by FirstRanker.com ---
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
Q.1 (a) When the use of positive rake angles and negative rake angles is recommended? 03
--- Content provided by FirstRanker.com ---
(b) Derive an expression of shear plane angle in single point cutting. 04
(c) What are the factors that affect tool life? Briefly describe their influence. 07
Q.2 (a) Explain the characteristics of cutting fluid. 03
(b) Why heat is generated in cutting, label various heat zones in metal cutting. 04
(c) What are the different methods of gear manufacturing? List the methods and explain any one. 07
--- Content provided by FirstRanker.com ---
OR
(c) In an orthogonal cutting operation, the following data have been observed: 07
Chip thickness:0.62 mm
Feed: 0.2 mm/rev.
Rake angle: 15°
--- Content provided by FirstRanker.com ---
Calculate: Cutting ratio, chip.reduction co-efficient, shear angle, dynamic shear strain involved in the deformation process.
Q.3 (a) What are the differences between Jigs and Fixtures? 03
(b) Explain construction and working of template jig. 04
(c) Explain 3-2-1'principle of location with figures. 07
OR
--- Content provided by FirstRanker.com ---
Q.3 (a) Discuss characteristics of cutting tool material. 03
(b) List down various gear finishing process and explain principle of gear hobbing. 04
(c) Enlist various clamping devices used in jigs and fixtures. Explain any two with neat sketch. 07
Q.4 (a) What is shear on a punch or die? 03
(b) Explain knockout with neat sketches. 04
--- Content provided by FirstRanker.com ---
(c) What are the various types of strippers? Explain their function with the help of suitable sketches. 07
OR
Q.4 (a) Compare direct pilots with indirect pilots. 03
(b) What is meant by clearance? Why it is important in shearing operation? 04
(c) Classify the die associated with press work and explain about compound die and progressive die. 07
--- Content provided by FirstRanker.com ---
FirstRanker.com
FirstRanker.com
Firstranker's choice FirstRanker.com
Q.5 (a) Classify non conventional machining process. 03
(b) What are the types of electrolyte used in ECM? List the desirable properties of them. 04
--- Content provided by FirstRanker.com ---
(c) Explain with neat sketch working principle, process capabilities and limitation of water jet machining. 07
OR
Q.5 (a) Using taylor equation and using n = 0.5, c = 400. Calculate the percentage increase in tool life when cutting speed is reduced 50%. 03
(b) What are the basic requirements for tool materials for EDM? 04
(c) Write short note on LBM. 07
--- Content provided by FirstRanker.com ---
This download link is referred from the post: GTU BE 2019 Summer Question Papers || Gujarat Technological University
--- Content provided by FirstRanker.com ---