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MCQs

Total Questions : 61 | Page 2 of 7 pages
Question 11. Which of the following NMR spectrometer emphasises on high performance versatility with cost being a secondary consideration?
  1.    Minimal type
  2.    Maximal type
  3.    Multipurpose type
  4.    Wideline type
 Discuss Question
Answer: Option C. -> Multipurpose type
Answer: (c).Multipurpose type
Question 12. Which of the following NMR spectrometer does not require a power supply and cooling system?
  1.    Minimal type
  2.    Maximal type
  3.    Multipurpose type
  4.    Wideline type
 Discuss Question
Answer: Option A. -> Minimal type
Answer: (a).Minimal type
Question 13. Which of the following components are used to separate the nuclear spin energy states?
  1.    RF channels
  2.    Magnet
  3.    Sample probe
  4.    Sweep generator
 Discuss Question
Answer: Option B. -> Magnet
Answer: (b).Magnet
Question 14. Minimal type of NMR spectrometer is inexpensive.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 15. Which of the following is used as a coolant for magnets in continuous-wave NMR spectrometer?
  1.    Water
  2.    Liquid He
  3.    Liquid Na
  4.    Heavy water
 Discuss Question
Answer: Option A. -> Water
Answer: (a).Water
Question 16. In frequency sweep method, which of the following parameters are varied continuously?
  1.    Magnetic field
  2.    RF signal
  3.    Sample concentration
  4.    Amplification factor
 Discuss Question
Answer: Option B. -> RF signal
Answer: (b).RF signal
Question 17. In field sweep method, which of the following parameters are varied continuously?
  1.    Magnetic field
  2.    RF signal
  3.    Sample concentration
  4.    Amplification factor
 Discuss Question
Answer: Option A. -> Magnetic field
Answer: (a).Magnetic field
Question 18. For high resolution work the magnetic field over the entire sample volume must be maintained uniform in space and time.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 19. Which of the following is not true of electromagnets?
  1.    They are expensive
  2.    They require a power supply
  3.    They don’t require a cooling system
  4.    They don’t require extensive shielding
 Discuss Question
Answer: Option C. -> They don’t require a cooling system
Answer: (c).They don’t require a cooling system
Question 20. Which of the following statements are not true about permanent magnets?
  1.    They are simple
  2.    They are inexpensive
  3.    They don’t require shielding
  4.    They don’t require power supply
 Discuss Question
Answer: Option C. -> They don’t require shielding
Answer: (c).They don’t require shielding

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