Download GTU BE/B.Tech 2019 Summer 6th Sem New 2162107 Heat Treatment Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2019 Summer 6th Sem New 2162107 Heat Treatment Previous Question Paper

1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER ?VI(NEW) ? EXAMINATION ? SUMMER 2019
Subject Code:2162107 Date:16/05/2019
Subject Name:Heat Treatment
Time:10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.


Q.1 (a) With neat sketch draw TTT diagram for hypereutectoid steel. 03
(b) Define Heat treatment. List out heat treatment processes. 04
(c) What is hardenability? Explain hardenability measurement by Jominy End
Quench test.
07

Q.2 (a) What is Critical Cooling Rate? 03
(b) How the continuous cooling diagram (CCT) does is differ from the
isothermal transformation diagram.
04
(c) Discuss Bain distortion model. 07
OR
(c) Explain mechanism of pearlitic transformation with neat sketch. 07
Q.3 (a) Why hardening is followed by tempering treatment? 03
(b) Write a short note on thermo mechanical treatment. 04
(c) Differentiate Annealing and Normalizing heat treatment processes. 07
OR
Q.3 (a) Discuss different Characteristics of Quenchants. 03
(b) Describe the plasma nitriding techniques. 04
(c) Write a note on tempering. 07
Q.4 (a) Write a note on secondary hardening. 03
(b) Write a note on patenting. 04
(c) Write a note on malleablizing annealing 07

OR
Q.4 (a) Write a note on temper embrittlement. 03
(b) Explain the sub-zero treatment with its need. 04
(c) List out Austenitic grain size measurement techniques? Explain any one
method.
07
Q.5 (a) Discuss heat treatment of Austempering. 03
(b) Explain induction hardening. 04
(c) List defects in heat treated parts and discuss with causes and remedies. 07
OR

Q.5 (a) What is the purpose of Spherodized Annealing? 03
(b) Discuss age-hardening heat treatment for Al-Cu alloys. 04
(c) What are different methods of case carburizing and give its need? Explain
pack carburizing by coal.
07

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