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MCQs

Total Questions : 1634 | Page 16 of 164 pages
Question 151. The __________ of a vapor pressure thermometer is a primary element.
  1.    Pointer
  2.    Bourdon tube
  3.    Bulb
  4.    None of these
 Discuss Question
Answer: Option C. -> Bulb
Question 152. A constant volume gas thermometer employing __________ is used to measure sub-zero (i.e., < 0° C) temperature.
  1.    Helium
  2.    Hydrogen
  3.    Nitrogen
  4.    None of these
 Discuss Question
Answer: Option A. -> Helium
Question 153. Which of the following thermocouples is incapable of measuring sub-zero (i.e., < 0°C) temperature?
  1.    Chromel-alumel
  2.    Iron-constantan
  3.    Platinum-platinum + rhodium
  4.    Copper-constantan
 Discuss Question
Answer: Option C. -> Platinum-platinum + rhodium
Question 154. Routh test
  1.    Criterion provides information about the actual location of roots
  2.    Cannot be used to test the stability of a control system containing transportation lag
  3.    Criterion is not applicable to systems with polynomial characteristic equation
  4.    Can not determine as to how many roots of the characteristics equation have positive real roots
 Discuss Question
Answer: Option B. -> Cannot be used to test the stability of a control system containing transportation lag
Question 155. What is the dynamic error in a critically damped second order instrument for a ramp input (AT)?
  1.    0.5 AT
  2.    2 AT
  3.    √AT
  4.    1.5 AT
 Discuss Question
Answer: Option B. -> 2 AT
Question 156. Liquid levels in autocalves are measued by
  1.    Simple float
  2.    Differential float type manometer
  3.    Glass gauge
  4.    None of these
 Discuss Question
Answer: Option B. -> Differential float type manometer
Question 157. Radiation pyrometers as compared to thermocouples
  1.    Has a slower speed of response
  2.    Can measure higher temperature
  3.    Can't measure the temperature of moving objects
  4.    Is more affected by corrosive atmosphere
 Discuss Question
Answer: Option B. -> Can measure higher temperature
Question 158. __________ stability method uses open loop transfer function.
  1.    Nyquist
  2.    Mikhalov
  3.    Ruth
  4.    None of these
 Discuss Question
Answer: Option A. -> Nyquist
Question 159. Alphatron measures pressure __________ microns.
  1.    < 1
  2.    < 3
  3.    > 3
  4.    < 0.1
 Discuss Question
Answer: Option C. -> > 3
Question 160. A system with transfer function (2S/4S) + 1 is of __________ order.
  1.    Zero
  2.    1st
  3.    2nd
  4.    3rd
 Discuss Question
Answer: Option B. -> 1st

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