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MCQs

Total Questions : 177 | Page 16 of 18 pages
Question 151. Based on self-inductance of a coil, how many types of inductive transducers are available?
  1.    5
  2.    10
  3.    4
  4.    20
 Discuss Question
Answer: Option C. -> 4
Answer: (c).4
Question 152. Self-inductance depends on ________
  1.    permeability
  2.    permittivity
  3.    plank’s constant
  4.    rydberg constant
 Discuss Question
Answer: Option A. -> permeability
Answer: (a).permeability
Question 153. What is a thermopile?
  1.    single thermocouple
  2.    series-parallel connection of thermocouples
  3.    parallel connection of thermocouples
  4.    series of thermocouples
 Discuss Question
Answer: Option D. -> series of thermocouples
Answer: (d).series of thermocouples
Question 154. Thermocouple must provide ________
  1.    small thermo e.m.f
  2.    sufficient thermo e.m.f
  3.    no thermo e.m.f
  4.    infinite thermo e.m.f
 Discuss Question
Answer: Option B. -> sufficient thermo e.m.f
Answer: (b).sufficient thermo e.m.f
Question 155. Most suitable material for a thermocouple is ________
  1.    brass
  2.    gold
  3.    platinum
  4.    silver
 Discuss Question
Answer: Option C. -> platinum
Answer: (c).platinum
Question 156. If two different metals are joined forming a closed circuit an electric current flows.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 157. Chromel-constantan thermopile consists of 25 thermocouples.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 158. Which of the following should satisfy for measuring higher temperatures using a thermocouple?
  1.    no wire is required
  2.    wire must be small
  3.    wire must be thin
  4.    wire must be heavy
 Discuss Question
Answer: Option D. -> wire must be heavy
Answer: (d).wire must be heavy
Question 159. Piezoelectric transducer is used for measuring __________
  1.    non-electrical quantities
  2.    electrical quantities
  3.    chemical quantities
  4.    any quantity
 Discuss Question
Answer: Option A. -> non-electrical quantities
Answer: (a).non-electrical quantities
Question 160. Piezoelectric crystals __________
  1.    float on water
  2.    dissolve in water
  3.    are not soluble in water
  4.    absorb water
 Discuss Question
Answer: Option B. -> dissolve in water
Answer: (b).dissolve in water

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