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MCQs

Total Questions : 1634 | Page 157 of 164 pages
Question 1561. A first order system with a time constant of 1 min is subjected to frequency response analysis. At an input frequency of 1 radian/min, the phase shift is______________?
  1.    45°
  2.    -90°
  3.    -180°
  4.    -45°
 Discuss Question
Answer: Option D. -> -45°
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1562. Liquid flow rate in a small channel is best measured by a/an____________________?
  1.    Weir
  2.    Pitot tube
  3.    Vane meter
  4.    Venturimeter
 Discuss Question
Answer: Option B. -> Pitot tube
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1563. What is the normal percentage of rhodium in platinum + rhodium element used in the thermocouple ?
  1.    0.1
  2.    3
  3.    13
  4.    29
 Discuss Question
Answer: Option C. -> 13
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1564. Pick out the most suitable instrument for measuring temperature in the range of-40 to 425°C ?
  1.    Mercury thermometer
  2.    Bimetallic thermometer
  3.    Radiation pyrometer
  4.    None of these
 Discuss Question
Answer: Option B. -> Bimetallic thermometer
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1565. Thermal wells are used in the temperature measurement to____________________?
  1.    Guard against corrosive and oxidising action on thermocouple materials
  2.    Reduce measuring lag
  3.    Increase the fidelity
  4.    Increase the sensitivity
 Discuss Question
Answer: Option A. -> Guard against corrosive and oxidising action on thermocouple materials
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1566. The open loop transfer function of a process is K [{(s + 1) (s + 4)}/{(s + 2) (s + 3)}]. In the root locus diagram, the poles will be at ___________________?
  1.    -1, -4
  2.    1, 4
  3.    -2, -3
  4.    2, 3
 Discuss Question
Answer: Option C. -> -2, -3
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1567. Feed forward controller accounts for the ______________ changes?
  1.    Set point
  2.    Load
  3.    Both A. & B.
  4.    Neither A. nor B.
 Discuss Question
Answer: Option B. -> Load
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1568. Stability of a control system containing a transportation lag can be best analysed by_______________?
  1.    Routh test
  2.    Root locus methods
  3.    Frequency response methods
  4.    None of these
 Discuss Question
Answer: Option C. -> Frequency response methods
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1569. Number of poles in a system with transfer function 1/(s2 + 2s2 + 1) is ________________?
  1.    2
  2.    5
  3.    3
  4.    1
 Discuss Question
Answer: Option C. -> 3
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1570. Thermocouple in a thermal well behaves as a true ________________?
  1.    First order system
  2.    Second order system (overdamped)
  3.    Multiple first order system
  4.    Second order system (underdamped)
 Discuss Question
Answer: Option C. -> Multiple first order system
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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