Download GTU BE/B.Tech 2018 Winter 6th Sem New 2162307 Testing And Identification Of Plastic Materials Question Paper

Download GTU (Gujarat Technological University) BE/BTech (Bachelor of Engineering / Bachelor of Technology) 2018 Winter 6th Sem New 2162307 Testing And Identification Of Plastic Materials Previous Question Paper

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1
Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY

BE - SEMESTER ?VI (NEW) EXAMINATION ? WINTER 2018
Subject Code:2162307 Date:20/11/2018

Subject Name:Testing and Identification of Plastic Materials

Time: 02:30 PM TO 05:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.

MARKS

Q.1 (a) Define Testing. List reasons for Testing. 03
(b) Explain about Specification and standards. 04
(c) Explain generalize stress-strain curve in detail. 07

Q.2 (a) Define HDT. List the factors affecting HDT 03
(b) Explain Compressive strength test. 04
(c) List the Hardness test carried out for plastic.Explain Rockwell
hardness test in detail.
07
OR
(c) Explain DSC test with neat sketch. 07
Q.3 (a) Define (1) Creep (2) Stress Relaxation (3) Yield point 03
(b) What is Flexural strength? Explain the test procedure 04
(c) Explain Izod Impact test with factors affecting its test result. 07
OR
Q.3 (a) (1) A _____________ material shows low modulus, low yield stress
but very high elongation and high stress at break.
(i) soft & tough (ii) soft & weak (iii) hard & tough
(2) What is crack initiation energy?
(3) Give full form of (i) ASTM (ii) ISO
03
(b) Explain: Shear strength Test

04
(c) Define creep. Explain about creep properties of plastics material in
detail.
07
Q.4 (a) Explain Arc Resistance Test. 03
(b) Explain: Abrasion Resistance Test 04
(c) Explain about Thermal conductivity Test (ASTM C177) in detail. 07
OR
Q.4 (a) List the factors affecting Tensile Strength Test results. 03
(b) Explain Co-efficient of Linear Thermal Expansion Test (ASTM
D696) for plastics material in brief with neat sketch
04
(c) Explain about Thermo gravimetric Analysis (TGA) Test in detail. 07
Q.5 (a) Define Refractive Index, Luminous Transmittance & Haze. 03
(b) Define flame retardant and self extinguish Plastics. Make a list of
Inherently flame retardant, Less flame retardant and quite flammable
plastics material.
04
(c) Explain about Di-electric strength Test (ASTM D 149) in detail. List
and explain factors affecting the test results.
07
OR

Q.5 (a) Explain spiral flow test. 03
(b) Explain ESCR test in detail with neat sketch 04
(c) Explain basic combustion process of Plastics material 07

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