This pdf comprises 30 MC questions on Analytical Instrumentation...

1. Analytical Instrumentation
MCQ
ER. FARUK BIN POYEN, Asst. Professor
DEPT. OF AEIE, UIT, BU, BURDWAN, WB, INDIA
faruk.poyen@gmail.com

2. 1. All bodies behave as source of _______________
 a) Electromagnetic radiation
 b) IR radiation
 c) Ultra violet radiation
 d) None of the mentioned
Answer: a
 Explanation: All bodies behave as a source of electromagnetic radiation under excited state.
2. Which of the following represent spectrum of frequency emission?
 a) Absorption spectra
 b) Emission spectra
 c) EM spectra
 d) None of the mentioned
Answer: b
 Explanation: All bodies behave as source of EM waves and spectrum of frequency emitted is known
as emission frequency.
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3. 3. Spectrography doesn’t compute energy of frequency spectrum.
 a) True
 b) False

Answer: b
 Explanation: Spectrography can be used for calculating energy of frequency spectrum.
4. Which of the following source is used for exciting bodies electrically?
 a) DC arc
 b) AC arc
 c) Spark
 d) All of the mentioned
Answer: d
 Explanation: Electrical excitation of body can be carried out using DC arc, AC arc and spark.
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4. 5. Which of the following is more used core in spectrometer?
 a) Graphite
 b) Carbon
 c) Aluminium
 d) Fullerine
Answer: a
 Explanation: Graphite is more used material than carbon as core in spectrometer.
6. Which of the following represents emission spectra?
 a) Continuous spectra
 b) Band spectra
 c) Line spectra
 d) All of the mentioned
Answer: d
 Explanation: Emission spectra are divided into continuous spectra, band spectra and line spectra.
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5. 7. Every spectrograph requires dispersion.
 a) True
 b) False

Answer: a
 Explanation: Spectrograph processes dispersed radiation.
8. Dispersion of radiation is carried out by _____________
 a) Prism
 b) Grating
 c) Both prism and grating
 d) Diamond
Answer: c
 Explanation: For dispersing radiation, prism or grating elements are used.
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6. 9. IR absorption pattern in absorption spectrography is known as___________
 a) Finger print
 b) Signature
 c) Absorption code
 d) Graph
Answer: a
 Explanation: Due to uniqueness IR absorption pattern in absorption spectrography is called fingerprint.
10. Which of the following represents fingerprint region?
 a) Less than 7um
 b) Between 7um to 15um
 c) Greater than 15um
 d) Greater than 100um
Answer: b
 Explanation: IR spectrum ranging between 7um to 15um wavelength offer best discrimination between
molecules and hence identified as fingerprint region.
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7. 11. Which of the following sensors provide higher temperature capacity?
 a) Thermopile
 b) Pyroelectric sensor
 c) Lead sulphide sensor
 d) Silicon sensor
Answer: d
 Explanation: Silicon sensors have higher temperature capacity of 4000C.
12. IR thermography is useful in medical field.
 a) True
 b) False
Answer: a
 Explanation: Many type of disease can be detected by using IR thermography.
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8. 13. IR thermograph is also known as_______________
 a) Thermogram
 b) Heat thermograph
 c) Thermogram
 d) None of the mentioned
Answer: c
 Explanation: Infra-red thermograph is also known as thermogram.
14. Which of the following sensor have large response time?
 a) Thermopile
 b) Pyroelectric sensor
 c) Lead sulphide sensor
 d) Silicon sensor
Answer: a
 Explanation: Thermopile require large response time (100ms).
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9. 15. Temperature sensor of silicon can detect wavelength of ______________
 a) Less than 0.1 um
 b) Less than 1.1 um
 c) Less than 10nm
 d) Greater than 100nm
Answer: b
 Explanation: Silicon sensors can sense wavelength of less than 1.1 um.
16. Radiation thermometers are pyrometers.
 a) True
 b) False
Answer: a
 Explanation: Radiation thermometers are also known pyrometers.
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10. 17. At 1000C wavelength of radiation will be ______________
 a) Less than 10um
 b) Less than 100um
 c) Less than 1000um
 d) Less than 10nm
Answer: a
 Explanation: At 1000C 90% of emitted radiation will have less than 10um wavelength.
18. Wavelength of peak radiation is represented by _____________
 a) 28.91 * T
 b) 2891/T
 c) 189 * T
 d) None of the mentioned
Answer: b
 Explanation: Ratio of 2891 and temperature gives wavelength at which peak radiation is seen.
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11. 19. Energy of emitted radiation from a body increases with ______________
 a) Increase in temperature
 b) Decrease in temperature
 c) No relation with temperature
 d) Net energy cannot be changed
Answer: a
 Explanation: Net energy emitted by body can be increased by increasing temperature.
20. Which of the following produce EM radiation in IR region?
 a) Body with negative temperature
 b) Body with temperature less than 1000C
 c) Body with temperature less than 6000C
 d) Body with temperature less than 10000C
Answer: c
 Explanation: Body with temperature between 0 to 6500C emit EM radiation in infra-red region.
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12. 21. Ozone layer is in earth layer ______________
 a) Toposphere
 b) Ionosphere
 c) Stratosphere
 d) Mesosphere
Answer: c
 Explanation: Ozone layer is mainly seen in stratosphere
22. CFC causes ozone layer depletion.
 a) True
 b) False
Answer: a
 Explanation: Chloro flouro carbon or CFC causes ozone layer depletion.
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13. 23. Ozone depletion is higher at _______________
 a) Polar regions
 b) Near polar regions
 c) Non polar regions
 d) None of the mentioned
Answer: a
 Explanation: Ozone depletion rate of polar regions are higher than any other regions due to motion of
air.
24. Which of the following is not poisonous to humans?
 a) Flue gases
 b) Stack gases
 c) HCl
 d) None of the mentioned
Answer: d
 Explanation: Flue gases, stack gases and HCl are poisonous to humans.
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14. 25. Toxic gases such as H2S, nitrogen oxides causes ____________
 a) Immediate harm to body
 b) Slow harm to body
 c) Not sure about speed of action
 d) None of the mentioned
Answer: a
 Explanation: Toxic gases such as H2S, Nitrogen Oxides and CO causes immediate harm to human
body.
26. NPL stands for _________________
 a) National population laboratory
 b) National pollution laboratory
 c) National physical laboratory
 d) Net pollution list
Answer: c
 Explanation: NPL stands for National Physical Laboratory.
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15. 27. VOC stands for _______________
 a) Viable organic components
 b) Volatile organic components
 c) Varying organic components
 d) Virtual organic carriage
Answer: a
 Explanation: VOC or volatile organic components emitted by sources are harmful to human.
28. Which of the following represents allowed rate of CO2?
 a) Less than 5000ppm
 b) Less than 700ppm
 c) Less than 300ppm
 d) Less than 100ppm
Answer: c
 Explanation: CO2 rate above 300ppm causes harm to human body.
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16. 29. Long path optical measurement uses _____________
 a) IR radiation
 b) Ultraviolet radiation
 c) Both IR and UV
 d) None of the mentioned
Answer: c
 Explanation: Long path optical measurement of pollution uses IR radiation or ultraviolet radiation.
30. Long path optical measurement have a range of several kilometers.
 a) True
 b) False
Answer: a
 Explanation: Range of long path optical measurement varies from several meters to several kilo
meters.
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17. References:
 http://www.sanfoundry.com/instrumentation-transducers-questions-answers-pollution-
monitoring/
 http://www.sanfoundry.com/instrumentation-transducers-question-answers-analysis-
instrumentation/
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