Jawaharlal Nehru Technological University Hyderabad
Jawaharlal Nehru Technological University Hyderabad B.Tech III PROPERTIES OF NANOMATERIALS Previous Question Paper (May - 2019 - R16)
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
Discuss about the measurement of magnetic properties of materials.
Answer
Magnetic properties are primarily measured using a Superconducting Quantum Interference Device (SQUID) magnetometer, which offers extreme sensitivity for detecting weak magnetic moments. Alternatively, Vibrating Sample Magnetometry (VSM) is used to measure the magnetic hysteresis loop by detecting the voltage induced by a vibrating sample in a magnetic field.
Write a short note on nano materials in art and cultural heritage.
Answer
Nanomaterials are increasingly used in art conservation to clean, consolidate, and protect cultural heritage objects. For example, calcium hydroxide nanoparticles are used to deacidify paper and canvas, while nanostructured coatings provide non-toxic, reversible protection against environmental degradation and graffiti without altering the aesthetic appearance of the original artwork.
Build a short note on magic numbers.
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Give a short note on the classification of nanomaterials.
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Define nanocomposite.
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List out the thermal properties of nanomaterials.
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Discuss about the importance of grain morphology.
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Construct a note on elasticity of nanodevices Materials.
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Compare Solute strengthening and Precipitate strengthening.
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Explain about the Forest Dislocation strengthening.
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Part B
Explain in detail about the mechanical behavior of materials.
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Discuss in detail about nanomaterials and nanostructures in nature.
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Discuss about the concept of specular and diffuse reflection.
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Explain about the concept of the interaction of materials and radiation.
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Elaborate in detail about the size effects of nanomaterials.
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Write a note on the quantum effects of nanomaterials.
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Analyse in detail about the surface curvature and strain confinement in nanomaterials.
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What are nanodispersions? Explain about them in detail.
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Compare in detail between nanocrystalline solids and nanolaminates.
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Discuss about the importance of thermal transport in Nanomaterials.
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Explain in detail about the magnetic properties of nanomaterials.
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Write in detail about the Elasticity of Bulk Nanomaterials.
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Differentiate in detail between Elasticity of discrete and nanodevice materials.
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Elaborate in detail about the rule of mixtures applied to density.
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Explain about the concept of density as a function of grain size.
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Write in detail about the concept of the physical basis of yield strength.
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Discuss in detail about the models for Hall-Petch behaviour.
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Elaborate in detail about the strengthening mechanisms in Single crystal metals.
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Explain in detail about the yield strength of nanomaterials.
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