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MCQs

Total Questions : 133 | Page 7 of 14 pages
Question 61. Which of the following is used in places where ion currents are very low?
  1.    Faraday cup collector
  2.    Channeltron
  3.    Micro-channel plate
  4.    Electron multiplier transducer
 Discuss Question
Answer: Option D. -> Electron multiplier transducer
Answer: (d).Electron multiplier transducer
Question 62. Continuous dynode electron multiplier transducer is a trumpet shaped device made with which of the following?
  1.    Glass doped with lead
  2.    Steel doped with bronze
  3.    Phosphor bronze doped with iron
  4.    Iron doped with calcium
 Discuss Question
Answer: Option A. -> Glass doped with lead
Answer: (a).Glass doped with lead
Question 63. The potential maintained across the continuous dynode multiplier transducer is which of the following?
  1.    1 to 5kV
  2.    5 to 10kV
  3.    2.5 to 6.2kV
  4.    1.8 to 2kV
 Discuss Question
Answer: Option D. -> 1.8 to 2kV
Answer: (d).1.8 to 2kV
Question 64. Which of the following is similar to photo multiplier transducer?
  1.    Faraday cup collector
  2.    Channeltron
  3.    Micro-channel plate
  4.    Electron multiplier transducer
 Discuss Question
Answer: Option D. -> Electron multiplier transducer
Answer: (d).Electron multiplier transducer
Question 65. Discrete type electron multiplier transducers can provide current gain upto which of the following?
  1.    10²
  2.    10⁵
  3.    10⁷
  4.    10¹¹
 Discuss Question
Answer: Option C. -> 10⁷
Answer: (c).10⁷
Question 66. No two molecules will be fragmented and ionized in exactly the same manner.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 67. Which of the following statements is not true about mass spectrometry?
  1.    Impurities of masses different from the one being analysed interferes with the result
  2.    It has great sensitivity
  3.    It is suitable for data storage
  4.    It is suitable for library retrieval
 Discuss Question
Answer: Option A. -> Impurities of masses different from the one being analysed interferes with the result
Answer: (a).Impurities of masses different from the one being analysed interferes with the result
Question 68. Which of the following ions pass through the slit and reach the collecting plate?
  1.    Negative ions of all masses
  2.    Positive ions of all masses
  3.    Negative ions of specific mass
  4.    Positive ions of specific mass
 Discuss Question
Answer: Option D. -> Positive ions of specific mass
Answer: (d).Positive ions of specific mass
Question 69. The procedure for mass spectroscopy starts with which of the following processes?
  1.    The sample is bombarded by electron beam
  2.    The ions are separated by passing them into electric and magnetic field
  3.    The sample is converted into gaseous state
  4.    The ions are detected
 Discuss Question
Answer: Option C. -> The sample is converted into gaseous state
Answer: (c).The sample is converted into gaseous state
Question 70. In a mass spectrometer, the ion currents are measured using which of the following?
  1.    Scintillation counter
  2.    Ion counter
  3.    Electrometer tube
  4.    Electric fields
 Discuss Question
Answer: Option C. -> Electrometer tube
Answer: (c).Electrometer tube

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