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MCQs

Total Questions : 1634 | Page 163 of 164 pages
Question 1621. Dead zone is the__________________?
  1.    Same as time constant
  2.    Same as transportation lag
  3.    Maximum change in the variable that does not change the reading of the instrument
  4.    None of these
 Discuss Question
Answer: Option C. -> Maximum change in the variable that does not change the reading of the instrument
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1622. A non-linear chemical system is exemplified by a/an_________________?
  1.    Isothermal CSTR
  2.    Mixer
  3.    Non-isothermal CSTR
  4.    None of these
 Discuss Question
Answer: Option C. -> Non-isothermal CSTR
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1623. The time constant of a unity gain, first order plus time delay process is 5 min. If the phase lag at a frequency of 0.2 rad/min is 60°, then the dead time (in minutes) is________________?
  1.    5π/12
  2.    π/6
  3.    π/12
  4.    π/3
 Discuss Question
Answer: Option A. -> 5π/12
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1624. Continuous flue gas analyser makes use of paramagnetic properties of some of its constituents, which move towards the strongest part of the magnetic field thus displacing diamagnetic gases. Which of the following gases is diamagnetic ?
  1.    CO2
  2.    O2
  3.    NO
  4.    NO2
 Discuss Question
Answer: Option A. -> CO2
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1625. Phase margin is equal to_______________?
  1.    180° – phase lag
  2.    Phase lag – 180°
  3.    Phase lag + 180°
  4.    Phase lag + 90°
 Discuss Question
Answer: Option A. -> 180° – phase lag
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1626. For the time domain function f(t) = t, the Laplace transform of ∫0 t f(t) dt is given by___________________?
  1.    1/2 S3
  2.    2/S3
  3.    1/S3
  4.    2/S2
 Discuss Question
Answer: Option C. -> 1/S3
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1627. Thermocouple is suitable for measuring_________________?
  1.    Liquid temperatures only
  2.    Very high temperatures only
  3.    Very low temperatures only
  4.    Both high and low temperatures
 Discuss Question
Answer: Option D. -> Both high and low temperatures
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1628. The time taken for a radioactive element to reduce to 50% of its original weight is _____________ years, if its half life period is 12 years?
  1.    24
  2.    18
  3.    6
  4.    36
 Discuss Question
Answer: Option B. -> 18
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1629. Pick out the wrong statement?
  1.    There is no transfer lag for a single first order system
  2.    Stirred tank with a water jacket exemplifies an interacting system
  3.    Transfer lag is a characteristic of all higher order systems (other than first order systems)
  4.    Transfer lag decreases as the number of stages decreases
 Discuss Question
Answer: Option D. -> Transfer lag decreases as the number of stages decreases
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 1630. The frequency at which maximum amplitude ratio is attained is called the ______________ frequency?
  1.    Corner
  2.    Resonant
  3.    Cross-over
  4.    Natural
 Discuss Question
Answer: Option B. -> Resonant
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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