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MCQs

Total Questions : 133 | Page 5 of 14 pages
Question 41. The DC ion accelerating voltage is swept from _________
  1.    0 to 50 V
  2.    50 to 100 V
  3.    200 to 300 V
  4.    50 to 250 V
 Discuss Question
Answer: Option D. -> 50 to 250 V
Answer: (d).50 to 250 V
Question 42. The resolution of the Bennet tube can be improved by using which of the following?
  1.    Sine wave rf signal
  2.    Square wave rf signal
  3.    Triangular wave rf signal
  4.    Random signal
 Discuss Question
Answer: Option B. -> Square wave rf signal
Answer: (b).Square wave rf signal
Question 43. In Bennet spectrometer, the rf voltage has a fixed frequency.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 44. Which of the following is the disadvantage of using three stage tubes?
  1.    Reduced resolution
  2.    Bulky construction
  3.    Complex
  4.    Heavy
 Discuss Question
Answer: Option A. -> Reduced resolution
Answer: (a).Reduced resolution
Question 45. The spurious lines can be reduced to a minimum by using which of the following?
  1.    Single stage tube
  2.    Two stage tube
  3.    Three stage tube
  4.    Reflectron
 Discuss Question
Answer: Option C. -> Three stage tube
Answer: (c).Three stage tube
Question 46. Which of the following is not the feature of Bennet type spectrometer?
  1.    Lightweight
  2.    Simple
  3.    Absence of spurious lines
  4.    Moderate resolution
 Discuss Question
Answer: Option C. -> Absence of spurious lines
Answer: (c).Absence of spurious lines
Question 47. The mass selection scheme uses a dc potential and not a radio frequency potential.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 48. Which of the following is not a component of quadrupole mass filter?
  1.    Electrodes
  2.    Choke
  3.    DC potential
  4.    Detector
 Discuss Question
Answer: Option D. -> Detector
Answer: (d).Detector
Question 49. Which of the following is not a feature of quadrupole mass spectrometer?
  1.    Low cost
  2.    Light weight
  3.    Low speed electronic scanning
  4.    Simple in construction
 Discuss Question
Answer: Option C. -> Low speed electronic scanning
Answer: (c).Low speed electronic scanning
Question 50. The resolving power of Bennet type spectrometer is primarily based on which of the following?
  1.    Distance between detector and reflectron
  2.    Difference between the individual rf accelerating stages
  3.    Length of the drift tube
  4.    Laser beam used
 Discuss Question
Answer: Option B. -> Difference between the individual rf accelerating stages
Answer: (b).Difference between the individual rf accelerating stages

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