JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech IV COMPOSITE MATERIALS Previous Question Paper (May - 2019 - R15)
Note: This question paper contains two parts A and B. Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and may have a, b, c as sub questions.
PART - A
What is reinforcement? Give examples.
Answer
Reinforcement is the constituent phase in a composite material that provides strength, stiffness, and structural integrity to the matrix. Examples include glass fibers, carbon fibers, boron fibers, and silicon carbide particles.
What is a Matrix? Give examples.
Answer
A matrix is the continuous phase that surrounds and binds the reinforcement together, transferring external loads to the reinforcement and protecting it from environmental damage. Examples include epoxy resins, aluminum alloys, and alumina ceramic.
Write equations for isostrain and isostress.
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List out the properties of whiskers.
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Give examples of Metal Matrix Composites.
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What are the advantages of Hot Isostatic Pressing?
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Give examples of Ceramic matrix composites.
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What are the limitations of Ceramic matrix composites?
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Give examples of Polymer Matrix Composites.
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List out the advantages of Polymer Matrix Composites over Ceramic matrix composites.
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PART - B
What are the advantages and limitations of composite materials over alloys.
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List out the uses of composite materials.
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Explain how reinforcements effect the properties of composite materials.
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Describe the future potential of composite materials.
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Briefly describe the production method for the following and list out their properties.
Glass fibers
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Carbon fibers.
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Briefly describe the production method for the following and list out their properties.
Kevlar fibers
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Boron fibers.
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Explain the role of reinforcements in Metal Matrix Composites
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Discuss the influence of shape, size and particle distribution on the properties of Metal Matrix Composites
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Explain cladding with a suitable example.
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Explain solid state processing of Metal Matrix Composites.
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Highlight the advantages of Metal Matrix Composites over Polymer Matrix Composites.
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Differentiate between Knitting, Braiding and Weaving.
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List out the properties and uses of Carbon-Carbon composites.
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Briefly explain the following with help of a suitable example.
Liquid metal infiltration
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Liquid phase sintering.
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Describe the hand lay-up process for producing a fiber glass reinforced part.
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List out the advantages and disadvantages of hand lay-up process.
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What are the important matrix materials for fiber reinforced plastics? What are their advantages?
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How does the amount and arrangement of glass fibers in fiber glass-reinforced plastics affect their stages?
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