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Engineering > Chemical Engineering

PROCESS CONTROL AND INSTRUMENTATION MCQs

Total Questions : 1314

Page 1 of 132 pages
Question 1. An aneroid barometer measures the __________ pressure.
  1.    Atmospheric
  2.    Absolute
  3.    Vacuum
  4.    Gage
 Discuss Question
Answer is Option B. -> Absolute
Question 2. Meleoid gauge measures the __________ pressure.
  1.    Positive
  2.    Sub-atmospheric
  3.    Very high
  4.    Atmospheric
 Discuss Question
Answer is Option B. -> Sub-atmospheric
Question 3. A manometer measures the __________ pressure.
  1.    Atmospheric
  2.    Absolute
  3.    Gauge
  4.    None of these
 Discuss Question
Answer is Option C. -> Gauge
Question 4. Which of the following thermocouples is capable of measuring a temperature of -50°C?
  1.    Platinum - platinum + rhodium
  2.    Chromel - alumel
  3.    Iron-constantan
  4.    Copper - constantan
 Discuss Question
Answer is Option A. -> Platinum - platinum + rhodium
Question 5. Which of the following is not a variable area flow meter?
  1.    Piston type meter
  2.    Rotameter
  3.    Magnetic flow meter
  4.    Orifice and tapered plug meter
 Discuss Question
Answer is Option C. -> Magnetic flow meter
Question 6. Platinum resistance thermometer can be used upto antimony point which is __________ °C, and is the temperature of equilibrium between solid antimony & liquid antimony at normal atmospheric pressure.
  1.    961.93
  2.    630.74
  3.    1064.43
  4.    1261.93
 Discuss Question
Answer is Option B. -> 630.74
Question 7. Thermal conductivity cell is the primary element of a/an __________ analyser.
  1.    Oxygen
  2.    Carbon dioxide
  3.    Carbon monoxide
  4.    Sulphur dioxide
 Discuss Question
Answer is Option B. -> Carbon dioxide
Question 8. The transfer function of a process is 1/(16s² + 8s + 4). If a step change is introduced into the system, then the response will be
  1.    Under damped
  2.    Critically damped
  3.    Over damped
  4.    None of these
 Discuss Question
Answer is Option A. -> Under damped
Question 9. Magnetic flowmeters are generally not used for the velocity/flow measurement of hydrocarbons due to their
  1.    Low thermal conductivity
  2.    Low electrical conductivity
  3.    High viscosity index
  4.    Low flash point
 Discuss Question
Answer is Option B. -> Low electrical conductivity
Question 10. Which of the following thermocouples has the least temperature measurement range?
  1.    Copper-constantan
  2.    Chromel-alumel
  3.    Platinum-platinum/rhodium
  4.    Iron-constantan
 Discuss Question
Answer is Option A. -> Copper-constantan
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