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MCQs

Total Questions : 148 | Page 3 of 15 pages
Question 21. In order to obtain ISS spectra, the backscattered primary ions are sampled by which of the following?
  1.    Faraday cup analyser
  2.    Photographic analyser
  3.    Micro-channel analyser
  4.    Cylindrical mirror analyser
 Discuss Question
Answer: Option D. -> Cylindrical mirror analyser
Answer: (d).Cylindrical mirror analyser
Question 22. Which of the following is the energy after collision with a surface atom for a scattering angle of 90° when E₀ is the energy of the incident ion, M₁ is the mass of the incident ion and M₂ is the mass of the target surface?
  1.    E₀(M₂-M₁)/(M₂+M₁)
  2.    E₀(M₂+M₁)/(M₂-M₁)
  3.    E₀(M₂×M₁)/(M₂+M₁)
  4.    E₀(M₂-M₁)/(M₂×M₁)
 Discuss Question
Answer: Option A. -> E₀(M₂-M₁)/(M₂+M₁)
Answer: (a).E₀(M₂-M₁)/(M₂+M₁)
Question 23. ISS is sensitive to every element heavier than which of the following?
  1.    Helium
  2.    Hydrogen
  3.    Nitrogen
  4.    Neon
 Discuss Question
Answer: Option A. -> Helium
Answer: (a).Helium
Question 24. Which of the following gases is not often used in ion spectroscopy?
  1.    Helium
  2.    Argon
  3.    Nitrogen
  4.    Neon
 Discuss Question
Answer: Option C. -> Nitrogen
Answer: (c).Nitrogen
Question 25. It is advantageous to use ions from a variety of gases.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 26. Which of the following is denotes the absolute quantitative analysis of SIMS?
  1.    30%
  2.    70%
  3.    50%
  4.    Not possible
 Discuss Question
Answer: Option D. -> Not possible
Answer: (d).Not possible
Question 27. Which of the following is the amount of matrix effect that occurs in SIMS?
  1.    Very low
  2.    Low
  3.    Some
  4.    Severe
 Discuss Question
Answer: Option D. -> Severe
Answer: (d).Severe
Question 28. Both ISS and SIMS have depth profiling capability.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 29. Which of the following is the energy range of ISS?
  1.    1 keV
  2.    2 keV
  3.    4 keV
  4.    8 keV
 Discuss Question
Answer: Option A. -> 1 keV
Answer: (a).1 keV
Question 30. Which of the following is the spectral range of SIMS?
  1.    0-10 amu
  2.    0-100 amu
  3.    0-500 amu
  4.    0-1000 amu
 Discuss Question
Answer: Option C. -> 0-500 amu
Answer: (c).0-500 amu

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