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MCQs

Total Questions : 177 | Page 17 of 18 pages
Question 161. Piezoelectric crystals produce _________
  1.    no voltage
  2.    low voltage
  3.    high voltage
  4.    very high voltage
 Discuss Question
Answer: Option C. -> high voltage
Answer: (c).high voltage
Question 162. For accurate temperature measurement in a thermocouple the __________
  1.    cold compensation is needed
  2.    hot compensation is needed
  3.    no compensation is needed
  4.    hot and cold compensations are needed
 Discuss Question
Answer: Option A. -> cold compensation is needed
Answer: (a).cold compensation is needed
Question 163. Microphone converts light into heat.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 164. A quartz crystal is _________
  1.    a chemical transducer
  2.    a photoelectric transducer
  3.    not a self-generating transducer
  4.    a self-generating transducer
 Discuss Question
Answer: Option D. -> a self-generating transducer
Answer: (d).a self-generating transducer
Question 165. Optical radiations involve _________
  1.    optoelectric devices
  2.    biological devices
  3.    mechanical devices
  4.    chemical devices
 Discuss Question
Answer: Option A. -> optoelectric devices
Answer: (a).optoelectric devices
Question 166. Photoconductive transducers produce output ________
  1.    due to change in inductance
  2.    due to change in light
  3.    due to change in resistance
  4.    due to change in temperature
 Discuss Question
Answer: Option C. -> due to change in resistance
Answer: (c).due to change in resistance
Question 167. Photoelectric transducers consist of _______
  1.    1 transducer
  2.    3 transducers
  3.    5 transducers
  4.    10 transducers
 Discuss Question
Answer: Option B. -> 3 transducers
Answer: (b).3 transducers
Question 168. Capacitive transduction involves ___________
  1.    change in resistance
  2.    change in inductance
  3.    change in resistance
  4.    change in capacitance
 Discuss Question
Answer: Option D. -> change in capacitance
Answer: (d).change in capacitance
Question 169. In electromagnetic based transduction measurand is ___________
  1.    converted into mechanical force
  2.    converted into electromotive force
  3.    converted into chemical force
  4.    converted into physical force
 Discuss Question
Answer: Option B. -> converted into electromotive force
Answer: (b).converted into electromotive force
Question 170. How do passive transducers develop electrical signals?
  1.    using a transformer
  2.    using internal source
  3.    using external source
  4.    using a diode
 Discuss Question
Answer: Option C. -> using external source
Answer: (c).using external source

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