Jawaharlal Nehru Technological University Hyderabad
Jawaharlal Nehru Technological University Hyderabad B.Tech II PRODUCTION TECHNOLOGY Previous Question Paper (December - 2018 - R15)
Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit.
Part A
What is draft allowance?
Answer
Draft allowance is the intentional slight taper provided on the vertical surfaces of a pattern to facilitate its easy and clean withdrawal from the sand mold without damaging the mold cavity walls.
Where core is used?
Answer
A core is used in casting to produce hollow sections, internal cavities, or complex shapes within a casting that cannot be formed by the pattern alone.
Differentiate permanent and temporary joints.
Answer
Sign in to view the complete answer paper.
Which electrode is used in spot welding and why?
Answer
Sign in to view the complete answer paper.
What is HAZ?
Answer
Sign in to view the complete answer paper.
To weld thicker metals, why larger tip radii are used.
Answer
Sign in to view the complete answer paper.
What factors affect on recrystallization temperature?
Answer
Sign in to view the complete answer paper.
Differentiate blanking and piercing operations.
Answer
Sign in to view the complete answer paper.
How a hole is produced in tube drawing?
Answer
Sign in to view the complete answer paper.
What is rotary swaging?
Answer
Sign in to view the complete answer paper.
Part B
What is directional solidification?
Answer
Sign in to view the complete answer paper.
Discuss the principles and application of hot chamber die casting process.
Answer
Sign in to view the complete answer paper.
What are the various types of patterns used?
Answer
Sign in to view the complete answer paper.
How the investment casting process takes place? Discuss its application.
Answer
Sign in to view the complete answer paper.
Find the best welding speed to be used for the welding of 6 mm steel plates with an ambient temperature of 30°C with the welding transformer set at 25 V and current passing at 300 A. The arc efficiency is 0.9 and the possible travel speeds are 6 to 9 mm/sec. The limiting cooling rate for satisfactory performance is 60°C/s at a temperature of 550°C.
Answer
Sign in to view the complete answer paper.
Explain spot, seam and projection and percussion welding.
Answer
Sign in to view the complete answer paper.
What is explosive welding? Explain.
Answer
Sign in to view the complete answer paper.
What are the causes and remedies of welding defects?
Answer
Sign in to view the complete answer paper.
What are the applications of laser welding?
Answer
Sign in to view the complete answer paper.
Differentiate TIG and MIG welding operation.
Answer
Sign in to view the complete answer paper.
Explain recrystallization and grain growth.
Answer
Sign in to view the complete answer paper.
Differentiate Hot working and Cold working metal forming process.
Answer
Sign in to view the complete answer paper.
What are the various operations that can be performed on Hydraulic press.
Answer
Sign in to view the complete answer paper.
What are the forces and power calculations required for bending operation?
Answer
Sign in to view the complete answer paper.
What is Rotary forging?
Answer
Sign in to view the complete answer paper.
Explain the process of tubes getting extruded.
Answer
Sign in to view the complete answer paper.
What is machine forging?
Answer
Sign in to view the complete answer paper.
What are the causes and remedies of forging defect?
Answer
Sign in to view the complete answer paper.