Engineering Sciences
GATE XE Polymer blends and composites PYQs
Build your understanding with focused practice from past exam papers.
How to practice Polymer blends and composites
Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.
Questions 1–10 of 23. Imported answers require independent review unless marked reviewed.
Question 116
Open questionXE-FMSQ1 markNeeds review
Which of the following is/are the most appropriate compatibilizer(s) for the polypropylene/Nylon 6 blend?
Your answerSelect all correct options. You can choose more than one.
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Open questionXE-FNAT2 marksNeeds review
A unidirectional composite of a resin is prepared with continuous fibers, where the volume fraction of the fiber in the composite is 0.7. Assume that the resin has a modulus of 9 GPa and the fiber has a modulus of 90 GPa. A sample of this composite, possessing a breadth of 4 mm and a thickness of 1 mm, is subjected to a uniaxial tensile test along the direction of the fiber.
Corresponding to a strain of 0.5 %, the force applied on the sample is ________ N. (Round off to the nearest integer)
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 114
Open questionXE-FMCQ1 markNeeds review
A suitable physical compatibilizer of a binary blend of poly(ethylene) and poly(propylene) is ______.
Your answerChoose one option.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 125
Open questionXE-FNAT2 marksNeeds review
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).Log in to check the answer
You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 126
Open questionXE-FNAT2 marksNeeds review
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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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 113
Open questionXE-FMCQ1 markNeeds review
Among the options given, choose the most suitable compatibilizer for blending Polyvinylidene fluoride (PVDF) and Acrylonitrile butadiene styrene (ABS).
Your answerChoose one option.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 115
Open questionXE-FMCQ1 markNeeds review
Polymer wetting is improved by the addition of fillers with functional groups. In a typical case-study, natural-clay was modified with hydroxyl groups and compounded with Nylon 6 along with an antioxidant. The resulting composite exhibited poor mechanical properties. Which one among the options given explains this observation?
Your answerChoose one option.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 130
Open questionXE-FNAT2 marksNeeds review
A continuous and aligned glass-fiber reinforced composite consists of 40 vol% of glass-fiber having a modulus of elasticity of 69 GPa and 60 vol% of a polyester resin, which when hardened, displays a modulus of 3.4 GPa. The modulus of elasticity of this composite in the longitudinal direction is__________GPa. (Rounded off to two decimal places)
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 113
Open questionXE-FMCQ1 markNeeds review
Weather resistance of high impact polystyrene can be improved by blending polystyrene with
Your answerChoose one option.
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Open questionXE-FMCQ1 markNeeds review
The blend of polyethylene and polypropylene is
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