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MCQs

Total Questions : 61 | Page 5 of 7 pages
Question 41. Which of the following is not an operating technique for sensitivity enhancement?
  1.    Optimization of sample volume
  2.    Optimization of instrumental parameters
  3.    Optimization of noise
  4.    Time averaging
 Discuss Question
Answer: Option C. -> Optimization of noise
Answer: (c).Optimization of noise
Question 42. Fourier transform can be accomplished by using which of the following components?
  1.    Spin decoder
  2.    Detector
  3.    Spectrum analyser
  4.    Oscilloscope
 Discuss Question
Answer: Option C. -> Spectrum analyser
Answer: (c).Spectrum analyser
Question 43. Sensitivity is the ratio of peak signal amplitude to which of the following?
  1.    Time
  2.    Rms noise
  3.    Average noise
  4.    Peak-to-peak noise
 Discuss Question
Answer: Option B. -> Rms noise
Answer: (b).Rms noise
Question 44. A 15.4 MHz crystal generates the _________ resonance frequency.
  1.    Hydrogen
  2.    Deuterium
  3.    Tritium
  4.    Helium
 Discuss Question
Answer: Option B. -> Deuterium
Answer: (b).Deuterium
Question 45. How can the need for an array of narrow-band filters and detectors be eliminated?
  1.    By using multi-channel excitation
  2.    By using a detector for each frequency
  3.    By reducing the number of detectors
  4.    By using Fourier transform
 Discuss Question
Answer: Option D. -> By using Fourier transform
Answer: (d).By using Fourier transform
Question 46. Given below is the diagram of Cw NMR spectrometer. Identify the unmarked component.Given Below Is The Diagram Of Cw NMR Spectrometer. Identify ...
  1.    Recorder
  2.    RF channel
  3.    Receiver
  4.    Sweep generator
 Discuss Question
Answer: Option D. -> Sweep generator
Answer: (d).Sweep generator
Question 47. When energy is absorbed by the sample, the absorption can be observed as a change in signal developed by which of the following components?
  1.    Amplifier
  2.    Photodetector
  3.    GM counter
  4.    Radiofrequency detector
 Discuss Question
Answer: Option D. -> Radiofrequency detector
Answer: (d).Radiofrequency detector
Question 48. Interaction between matter and electromagnetic radiation can be observed by subjecting a substance to magnetic fields in which of the following manner?
  1.    Both fields should be stationary
  2.    Both fields should be varying
  3.    One field should be stationary and the other should be varying
  4.    It must be subjected to only one field
 Discuss Question
Answer: Option C. -> One field should be stationary and the other should be varying
Answer: (c).One field should be stationary and the other should be varying
Question 49. Nuclei having either the number of protons or neutrons as odd have _______ spin.
  1.    Integral spin
  2.    Half integral spin
  3.    Zero spin
  4.    Positive spin
 Discuss Question
Answer: Option B. -> Half integral spin
Answer: (b).Half integral spin
Question 50. The amount of energy available in radio frequency radiation is sufficient for which of the following?
  1.    Excite an atom
  2.    Vibrate an atom
  3.    Vibrate a molecule
  4.    Affect the nuclear spin of an atom
 Discuss Question
Answer: Option D. -> Affect the nuclear spin of an atom
Answer: (d).Affect the nuclear spin of an atom

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