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Posted Date: 29 Oct 2009 Posted By: Sree.... Member Level: Platinum
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2007 Andhra Pradesh State Jawaharlal Nehru Technological University Code No: RR312201 III B.Tech I Semester Supplimentary Examinations, November 2007 ANALYTICAL INSTRUMENTATION [Set No. 1] Question paper
Code No: RR312201 Set No. 1
III B.Tech I Semester Supplimentary Examinations, November 2007
ANALYTICAL INSTRUMENTATION
(Instrumentation & Control Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
1. (a) What is pH? Explain the importance of pH measurement in process industries.
(b) Explain the principle of pH measurement.
(c) What is the role of buffer solution in pH measurement? [6+6+4]
2. (a) Explain the constructional details of sodium analyzer.
(b) Discuss the various principles used in sodium analyzer. [8+8]
3. (a) Explain the principle of operation of a paramagnetic oxygen analyzer?
(b) Describe in detail, how Galvanic method can be used to determine oxygen
concentration of a gas. [8+8]
4. Explain in detail sample injection system in chromatography? [16]
5. (a) Distinguish between photodiode array detector and diode array detector.
(b) Give a schematic and explain the multi-channel spectrophotometer. [8+8]
6. (a) Explain the operation of multi channel type instrument to calculate focal
length of a monochromator.
(b) If the order used in an echelle grating is 70 and a dispersion angle 600, groove
density 80/mm and focal length 0.5 m, Obtain the reciprocal linear dispersion
and resolution. [6+10]
7. (a) Write down the needs of mass Spectrometer.
(b) Discuss the merits of various types of mass Spectrometer. [8+8]
8. Write short notes on:
(a) Gas amplification gain.
(b) Geiger range.
(c) Unit which is used to describe the value of radio activity. [6+4+6]
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