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MCQs

Total Questions : 177 | Page 14 of 18 pages
Question 131. Strain gauge works on the principle of _______
  1.    piezo-electric effect
  2.    barkhausen criterion
  3.    piezo- resistive effect
  4.    feedback element effect
 Discuss Question
Answer: Option C. -> piezo- resistive effect
Answer: (c).piezo- resistive effect
Question 132. In metallic gauges resistance changes due to _______
  1.    temperature
  2.    current
  3.    voltage
  4.    dimension
 Discuss Question
Answer: Option D. -> dimension
Answer: (d).dimension
Question 133. Platinum is used for industrial applications because ________
  1.    it is cheap
  2.    it is available readily
  3.    it is a noble metal
  4.    it gives accurate measurements
 Discuss Question
Answer: Option D. -> it gives accurate measurements
Answer: (d).it gives accurate measurements
Question 134. Resistance thermometer provides the change in electrical resistance.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 135. In a temperature sensing element ________
  1.    low value of α is required
  2.    infinite value of α is required
  3.    α must be zero
  4.    high value of α is required
 Discuss Question
Answer: Option D. -> high value of α is required
Answer: (d).high value of α is required
Question 136. If the sensing element is large, then less amount of heat is required.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 137. Most metallic conductors have a ________
  1.    neutral temperature coefficient of resistance
  2.    negative temperature coefficient of resistance
  3.    positive temperature coefficient of resistance
  4.    zero temperature coefficient of resistance
 Discuss Question
Answer: Option C. -> positive temperature coefficient of resistance
Answer: (c).positive temperature coefficient of resistance
Question 138. Nickel and its alloys can be used over a temperature range of ________
  1.    100 to 450 K
  2.    10 to 50 K
  3.    0 to 25 K
  4.    5 to 15 K
 Discuss Question
Answer: Option A. -> 100 to 450 K
Answer: (a).100 to 450 K
Question 139. Thermistors ________
  1.    sense large changes in temperature
  2.    cannot sense any change in temperature
  3.    sense small changes in temperature
  4.    have a positive temperature coefficient of resistance
 Discuss Question
Answer: Option C. -> sense small changes in temperature
Answer: (c).sense small changes in temperature
Question 140. Thermistor is a contraction _________
  1.    thermal resistor
  2.    laser resistor
  3.    electric resistor
  4.    mechanical resistor
 Discuss Question
Answer: Option A. -> thermal resistor
Answer: (a).thermal resistor

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