GATE XE 2024 Paper 1 — page 42

Questions 124–126 of 175. Imported answers require review unless explicitly marked reviewed.

If a given poly(ethylene) sample with specific volume,

shows: specific volume of the crystalline fraction,

and specific volume of the amorphous fraction,

, then the % crystallinity (based on mass fraction) of the poly(ethylene) sample is ______ % (rounded off to the nearest integer).

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The glass transition temperature (

) of poly(2,6-dimethyl-p-phenylene oxide) (PPO) is 206 °C and the

of poly(styrene) (PS) is 90 °C. The

of a 50/50 (wt/wt) miscible blend of PPO/PS is ______ °C (rounded off to the nearest integer).

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A unidirectional composite is prepared using 70% by volume of epoxy matrix and 30% by volume of carbon fibre. The elastic modulus of the epoxy matrix is 3.5 GPa and the elastic modulus of the carbon fibre is 350 GPa. The longitudinal elastic modulus of the composite is ______ GPa (rounded off to the nearest integer).

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2024 · Paper 1

Question 124

Question 125

Question 126