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MCQs

Total Questions : 100 | Page 9 of 10 pages
Question 81. Why is the use of infrared analyzers limited when it comes to the analysis of inorganic compounds?
  1.    Slow response occurs
  2.    Less accurate results occur
  3.    Strong absorption of IR radiation by water
  4.    Small range
 Discuss Question
Answer: Option C. -> Strong absorption of IR radiation by water
Answer: (c).Strong absorption of IR radiation by water
Question 82. Which of the following is the chopping frequency used for industrial analyzers in the simple infrared analyser for gas analysis?
  1.    2-10 Hz
  2.    2-50 Hz
  3.    2-100 Hz
  4.    2-150 Hz
 Discuss Question
Answer: Option A. -> 2-10 Hz
Answer: (a).2-10 Hz
Question 83. Vibration excitation occurs only if the sample has hetero-atomic molecules.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 84. Which of the following is the chopping frequency used for medical applications in simple infrared analyser for gas analysis?
  1.    2-10 Hz
  2.    2-50 Hz
  3.    2-100 Hz
  4.    2-150 Hz
 Discuss Question
Answer: Option B. -> 2-50 Hz
Answer: (b).2-50 Hz
Question 85. Which of the following is used as a source in the simple infrared analyzer for gas analysis?
  1.    Tungsten filament lamp
  2.    Nernst glower
  3.    Hot-wire spiral
  4.    Mercury arc lamp
 Discuss Question
Answer: Option C. -> Hot-wire spiral
Answer: (c).Hot-wire spiral
Question 86. Luft detector cell which uses gas as detection mechanism is not vibration sensitive.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 87. Which kind of filter is used in improved version of infrared gas analyzer at the output end?
  1.    Low pass filter
  2.    High pass filter
  3.    Narrow bandpass filter
  4.    Wide bandpass filter
 Discuss Question
Answer: Option C. -> Narrow bandpass filter
Answer: (c).Narrow bandpass filter
Question 88. Thermal conductivity analyzers cannot be used in which of the following measurements?
  1.    Hydrogen in blast furnace gases
  2.    Determination of argon in oxygen in the process of air decomposition
  3.    Sulphur dioxide in roasting gases in production of sulphuric acid
  4.    Oxygen from a mixture of oxygen and nitrogen
 Discuss Question
Answer: Option D. -> Oxygen from a mixture of oxygen and nitrogen
Answer: (d).Oxygen from a mixture of oxygen and nitrogen
Question 89. Which among the following elements has the highest thermal conductivity?
  1.    Nitrogen
  2.    Oxygen
  3.    Hydrogen
  4.    Chlorine
 Discuss Question
Answer: Option C. -> Hydrogen
Answer: (c).Hydrogen
Question 90. In which of the following conditions can thermal conductivity analyzer be used for multi-component mixtures?
  1.    When all the components have same thermal conductivities
  2.    When all the components have very different thermal conductivities
  3.    When all but one component have same thermal conductivities
  4.    When all components have very different thermal conductivities except two of them which are the same
 Discuss Question
Answer: Option C. -> When all but one component have same thermal conductivities
Answer: (c).When all but one component have same thermal conductivities

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