JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech IV Year MATERIAL CHARACTERIZATION TECHNIQUES Previous Question Paper (May/June - 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 the basic principle of optical microscopy?
Answer
The basic principle of optical microscopy is the magnification of an object using a series of glass lenses to focus visible light that is either reflected from or transmitted through a specimen, allowing the formation of an enlarged image for visual inspection.
What are the characteristics that can be measured by using polarized light?
Answer
Polarized light microscopy allows for the measurement of the following characteristics: optical anisotropy (birefringence), refractive index variations, crystal orientation, the presence of internal stresses or strains in transparent materials, and the identification of minerals or crystalline phases based on their extinction angles and interference colors.
List the application of SEM.
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What are the advantages and disadvantages of TEM?
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What is Bragg’s law?
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What are the properties of X-ray?
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List the advantages and disadvantages of powder diffraction.
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What is the application of XRD?
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What is the basic of spectroscopy?
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What is the principle of infrared spectroscopy?
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PART-B
Enumerate important lens defects and their corrections.
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Briefly explain measurement techniques used to evaluate surface condition.
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Explain the resolving power and magnification of optical microscopy.
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Briefly explain image processing with respect to optical microsopy.
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Enumerate the steps involved in specimen preparation in SEM.
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Explain the different modes used in SEM.
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Write about depth of field and depth of focus in TEM.
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Explain the preparation of specimen for TEM Replica methods.
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How are X-rays produced?
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What are the experimental methods of diffraction? Explain.
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Explain the Intensity of diffracted beam.
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What are the factors affecting the diffraction intensities?
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How crystal structure is determined by XRD?
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Briefly explain chemical analysis by diffraction.
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Explain stress measurement by XRD.
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Enumerate on phase diagram determination by XRD.
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Explain the equipment used for spectroscopy.
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What is vibration spectroscopy? Explain.
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With neat sketch explain the NMR Pattern.
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With relevant sketch explain the Thermogravemetic Analysis.
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