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MCQs

Total Questions : 151 | Page 3 of 16 pages
Question 21. During which of the following conditions is the blank correction necessary?
  1.    If sample concentration rises in linear response region
  2.    If sample concentration falls in linear response region
  3.    If sample concentration rises in non-linear response region
  4.    If sample concentration falls in non-linear response region
 Discuss Question
Answer: Option D. -> If sample concentration falls in non-linear response region
Answer: (d).If sample concentration falls in non-linear response region
Question 22. Ion analysers need calibration once in which of the following durations?
  1.    Every two or three hours
  2.    Every nine or ten hours
  3.    Every 24 hours
  4.    Every 48 hours
 Discuss Question
Answer: Option A. -> Every two or three hours
Answer: (a).Every two or three hours
Question 23. In ion analysers, which of the following serve the dual purpose of controlling the operating current of FET and providing current gain?
  1.    FET itself does it
  2.    SCR
  3.    Op-amp
  4.    Diode
 Discuss Question
Answer: Option C. -> Op-amp
Answer: (c).Op-amp
Question 24. Which of the following is not a type of ground in ion analyser?
  1.    Chassis and electrostatic ground
  2.    Digital ground
  3.    Analog ground
  4.    Reference ground
 Discuss Question
Answer: Option D. -> Reference ground
Answer: (d).Reference ground
Question 25. The presence of dirt or moisture degrades which of the following?
  1.    Circuit components
  2.    High input impedance of buffer amplifier
  3.    Low input impedance of buffer amplifier
  4.    Low output impedance of buffer amplifier
 Discuss Question
Answer: Option B. -> High input impedance of buffer amplifier
Answer: (b).High input impedance of buffer amplifier
Question 26. Which of the following biosensors use the movement of electrons produced during redox reactions?
  1.    Amperometric biosensor
  2.    Potentiometric biosensors
  3.    Piezo-electric biosensors
  4.    Optical biosensors
 Discuss Question
Answer: Option A. -> Amperometric biosensor
Answer: (a).Amperometric biosensor
Question 27. Which of the following transducers must be used for dissolved oxygen analyser?
  1.    Potentiometric
  2.    Polarographic
  3.    Ion-selective electrode
  4.    Optical transducer
 Discuss Question
Answer: Option B. -> Polarographic
Answer: (b).Polarographic
Question 28. For constructing the glucose sensor, which of the following is used as a gel?
  1.    Urea
  2.    Urease
  3.    Acrylamide
  4.    Polyacrylamide
 Discuss Question
Answer: Option D. -> Polyacrylamide
Answer: (d).Polyacrylamide
Question 29. Nanoscopic optical biosensors have fast response time but the sensitivity is reduced.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 30. In glucose sensor, a measure of change in oxygen value is a measure of the glucose value.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True

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