GATE XE 2017 Paper 1 — page 37

Questions 109–111 of 175. Imported answers require review unless explicitly marked reviewed.

Based on the graphs 1-5, which option best describes the stress-strain behaviour of materials listed as P, Q, R, S and T?

Diagram for Engineering Sciences question 109

P-Hard and brittle Q-Hard and tough R-Soft and weak S-Hard and strong T-Soft and tough

Your answerChoose one option.

P-2; Q-1; R-5; S-4; T-3

P-1; Q-3; R-4; S-2; T-5

P-1; Q-2; R-5; S-3; T-4

P-2; Q-3; R-1; S-4; T-5

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The two characterization techniques which can be used to determine degree of crystallinity of a polymer are

P. Scanning Electron Microscopy Q. Thermogravimetric Analysis R. Wide Angle X-Ray Diffraction S. Differential Scanning Calorimetry

Your answerChoose one option.

P&R

Q&R

R&S

Q&S

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The density of polyethylene crystals is 998 kg/m³ and that of totally amorphous polyethylene is 886 kg/m³. If the density of a polyethylene sample is 949 kg/m³, the crystallinity in volume fraction is ____ % (round off final answer to two digits after decimal place).

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2017 · Paper 1

Question 109

Question 110

Question 111