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MCQs

Total Questions : 177 | Page 15 of 18 pages
Question 141. How can corrosion be prevented in a resistance thermometer?
  1.    by immersing the setup in oil
  2.    by enclosing the elements in a glass tube
  3.    by using guard rings
  4.    by painting the elements
 Discuss Question
Answer: Option B. -> by enclosing the elements in a glass tube
Answer: (b).by enclosing the elements in a glass tube
Question 142. Thermistors have ________
  1.    positive temperature coefficient
  2.    negative temperature coefficient
  3.    zero temperature coefficient
  4.    infinite temperature coefficient
 Discuss Question
Answer: Option B. -> negative temperature coefficient
Answer: (b).negative temperature coefficient
Question 143. At small values of voltage, a thermistor ________
  1.    reaches peak current slowly
  2.    reaches peak current immediately
  3.    does not reaches peak current
  4.    reaches peak current intermediately
 Discuss Question
Answer: Option A. -> reaches peak current slowly
Answer: (a).reaches peak current slowly
Question 144. Thermistor has low resistance.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 145. Pressure is the _________
  1.    force per unit area
  2.    mass per unit area
  3.    force per unit volume
  4.    mass per unit volume
 Discuss Question
Answer: Option A. -> force per unit area
Answer: (a).force per unit area
Question 146. Pressure measurement devices make use of ________
  1.    non-elastic member
  2.    elastic member
  3.    bendable member
  4.    non-bendable member
 Discuss Question
Answer: Option B. -> elastic member
Answer: (b).elastic member
Question 147. Output of electrical transducer is ________
  1.    inversely proportional to displacement
  2.    proportional to square of displacement
  3.    proportional to displacement
  4.    constant
 Discuss Question
Answer: Option C. -> proportional to displacement
Answer: (c).proportional to displacement
Question 148. Reluctance of a coil is given by which of the following relation?
  1.    S = 1⁄A
  2.    S = 1⁄μ
  3.    S = a⁄μA
  4.    S = 1⁄μA
 Discuss Question
Answer: Option D. -> S = 1⁄μA
Answer: (d).S = 1⁄μA
Question 149. What is the relation between the self-inductance and the reluctance of a coil?
  1.    directly proportional
  2.    inversely proportional
  3.    no relation
  4.    constant
 Discuss Question
Answer: Option B. -> inversely proportional
Answer: (b).inversely proportional
Question 150. In an eddy current transducer output depends on the variation in the eddy current.
  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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