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MCQs

Total Questions : 120 | Page 5 of 12 pages
Question 41. Which of the following quantities are sensitive to electromechanical flow meters?
  1.    Viscosity
  2.    Density
  3.    Temperature
  4.    None of the mentioned
 Discuss Question
Answer: Option D. -> None of the mentioned
Answer: (d).None of the mentioned
Question 42. Which of the following is correct for the tachometer system?
  1.    First order system
  2.    Second order system
  3.    Third order system
  4.    Unpredictable
 Discuss Question
Answer: Option B. -> Second order system
Answer: (b).Second order system
Question 43. Which of the following represents the expression of output from electromechanical flow meter?
  1.    BDV
  2.    BV
  3.    BD
  4.    BD²V
 Discuss Question
Answer: Option A. -> BDV
Answer: (a).BDV
Question 44. Which of the following is correct for AC and DC tachometers?
  1.    Sensitivity if AC tachometer is very high
  2.    Sensitivity of DC tachometer is very high
  3.    Sensitivity of both are equal
  4.    None of the mentioned
 Discuss Question
Answer: Option B. -> Sensitivity of DC tachometer is very high
Answer: (b).Sensitivity of DC tachometer is very high
Question 45. Electromechanical system can be used for measuring vibration.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 46. Photoelectric devices are sensitive to all wavelength.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 47. Which of the following quantities are insensitive to solid state semiconductor photoelectric transducers?
  1.    X ray
  2.    Gamma ray
  3.    Alpha and beta rays
  4.    None of the mentioned
 Discuss Question
Answer: Option D. -> None of the mentioned
Answer: (d).None of the mentioned
Question 48. In photo emissive transducers, electrons are attracted by ___________
  1.    Cathode
  2.    Anode
  3.    Grid
  4.    Body
 Discuss Question
Answer: Option B. -> Anode
Answer: (b).Anode
Question 49. Why inert gas is used in photo electric transducers?
  1.    To increase efficiency
  2.    To increase sensitivity
  3.    To increase robustness
  4.    None of the mentioned
 Discuss Question
Answer: Option B. -> To increase sensitivity
Answer: (b).To increase sensitivity
Question 50. LDR’s are also called _______________
  1.    Photo voltaic cell
  2.    Photo resistive cell
  3.    Photo emissive cell
  4.    All of the mentioned
 Discuss Question
Answer: Option B. -> Photo resistive cell
Answer: (b).Photo resistive cell

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