Download GTU BE/B.Tech 2019 Summer 3rd Sem New 2132104 Testing Of Metals And Alloys Question Paper

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GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-III (NEW) EXAMINATION — SUMMER 2019

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Subject Code: 2132104 Date: 11/06/2019
Subject Name: Testing of Metals and Alloys
Time: 02:30 PM TO 05:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

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2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.

MARKS

Q.1 (a) Define: Ductility, Toughness and Resilience. 03
(b) Describe about yield point phenomena. 04

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(c) Explain Rockwell Hardness Test method. Mention advantages & limitations. 07

Q.2 (a) Define and differentiate Fatigue life and Fatigue limit. 03
(b) Discuss effect of temperature and strain rate on flow properties. 04
(c) Draw and discuss engineering and true stress-strain curve. 07

OR

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(c) Explain the procedure of tensile testing. 07

Q.3 (a) Discuss important features of fatigue failure. 03
(b) ‘Testing of material is an important task for industry” - justify comment. 04
(c) What do you mean by Impact Test.? Explain Izod impact test. 07

OR

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Q.3 (a) State the objective of ‘testing of material’. 03
(b) Discuss the importance of calibration of testing instruments. 04
(c) Describe Charpy Impact test. Derive Relationship for energy absorbed by specimen. 07

Q.4 (a) Enlist advantages & limitations of Vicker Hardness Test method. 03
(b) Explain rebound Hardness test. 04

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(c) Describe Mechanisms of fatigue failure in metals. 07

OR

Q.4 (a) Describe the Bauschinger effect. 03
(b) Describe the variables affecting Fatigue strength. 04
(c) Discuss Brinell Hardness Test Procedure in detail. Mention Limitations. 07

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Q.5 (a) Differentiate between ductile and brittle fracture. 03
(b) Give Mechanism of cup and cone type fracture. 04
(c) Define creep and describe Mechanism of creep deformation in metals. 07

OR

Q.5 (a) Define and explain Creep-Rupture strength. 03

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(b) Explain Scratch Hardness test. 04
(c) Describe the creep testing method. 07

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