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Previous Year Exam Questions for ANALYTICAL INSTRUMENTATION - AI of 2017 - bput by Verified Writer

  • 2017
  • PYQ
  • Biju Patnaik University of Technology BPUT - BPUT
  • Electronics and Instrumentation Engineering
  • B.Tech
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Registration No: Total Number of Pages: 02 B.Tech. PEI5D001 5th Semester Regular Examination 2017-18 Analytical Instrumentation BRANCH: AEIE, EIE, IEE Time: 3 Hours Max Marks: 100 Q.CODE: B387 Answer Question No.1 and 2 which are compulsory and any four from the rest. The figures in the right hand margin indicate marks. Q1 a) b) c) d) e) f) g) h) i) j) Q2 a) b) c) d) e) f) g) h) Answer the following questions: multiple type or dash fill up type Lambert’s law states that the intensity of light decreases with respect to ______________ Which of the following detectors is used to detect light intensities which are very weak? i)Photomultiplier tube ii)Photovoltaic cell iii)Photo emissive tubes iv) Photo reflector In the most widely used beam splitter, a thin film of ________ is sandwiched between two plates of low refractive index solid. When the pH exceeds________, the body is considered to be in a state of alkalosis and pH below _________indicates acidosis. Which of the following is not a feature of carrier gas used in gas chromatography? i) It must be chemically inert ii) It should not be completely pure iii) It should be suitable for the detector employed iv) It should be cheap The force produced during operation of Paramagnetic oxygen analyzer is proportional to __________________________. Collimators may be used between______________and____________. X-ray absorption meters have which of the following major disadvantages? i) Low accuracy ii) Low range iii) Low sensitivity iv) It is destructive NMR spectroscopy indicates the chemical nature of the __________ and spatial positions of____________. i) Electrons, Protons ii) Neutrons, electrons iii) Nuclei, electrons iv) Nuclei, neighbouring nuclei Which of the following is not a type of optics employed in electron probe microanalyser? i) Electron optics ii) Light optics iii) X-ray optics iv) Gamma optics (2 x 10) Answer the following questions: Short answer type What is the significance of signal conditioner in analytical instrument? Write few important facilities those are provided in Intelligent Analytical Instrumentation Systems. Write the frequency ranges of the following electromagnetic spectrums : UV, Visible, IR. Describe any method of obtaining monochromatic ray. What do you mean by paramagnetic property of gases? Give three examples of gases having paramagnetic property. Write down the characteristics of ion selective electrodes. Describe different sample injection systems used in gas chromatography? List down different sources of IR radiation? (2 x 10)

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Q3 i) j) Define Bragg's Law. What is Fourier Transform NMR Spectroscopy? a) List various types of Infrared Spectrophotometers used for analytical instrumentation. Explain basic principle of operation of any ONE type of Infrared Spectrophotometers. Describe the principle of operation of Double-beam Filter Photometer with neat diagram. (10) What is a flame photometer? Describe in detail about different parts of a flame photometer. Write down two applications of flame photometer. Explain different sources of error in Spectrophotometric measurements with proper example. (10) Distinguish between a packed column and open tubular column. Draw the schematic diagram of a gas chromatograph and describe its operation with different types of detectors usually required for the purpose. Define retention time. From a two component chromatogram following data are obtained: tRB = 19.92 m, tRA = 18.80 m, W B = 1.22 m and W A = 1.02 m. The column length is 50 cm. Calculate the number of plates , plate height and resolution. (10) What is the need of blood pH measurement? Describe the electrodes used for blood pH measurement. What is the effect of blood on electrodes? What is the principle of pH measurement? Describe the construction of glass electrode with neat diagram. (10) b) Q4 a) b) Q5 a) b) Q6 a) b) (5) (5) (5) (5) Q7 a) b) Describe the methods used for measurement of blood pCO2 and pO2. Explain a paramagnetic oxygen analyzer. What are the sources of error in it? (10) (5) Q8 a) What is a nuclear magnetic resonance spectroscopy? Describe the principle of nuclear magnetic resonance in detail. Explain the basic components of the instrumentation associated with X-ray methods with proper diagram. (10) Discuss different detectors used for detection of radiation. How can X-ray absorption spectra be utilized for analysis purposes? What are characteristic X-rays? (10) (5) b) Q9 a) b) (5)

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