Process Control and Instrumentation MCQs with answers Page - 2

Here, you will find a collection of MCQ questions on Process Control and Instrumentation. Go through these questions to enhance your preparation for upcoming examinations and interviews.

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Q. Dead zone is the

  • (A) Same as time constant
  • (B) Same as transportation lag
  • (C) Maximum change in the variable that does not change the reading of the instrument
  • (D) None of these

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Q. A typical example of a physical system with under damped characteristic is a

  • (A) U-tube manometer
  • (B) Spring loaded diaphragm valve
  • (C) CSTR with first order reaction
  • (D) Thermocouple kept immersed in a liquid filled thermowell

A

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Q. Dilatometer is used to measure

  • (A) Stress
  • (B) Strain
  • (C) Deflection
  • (D) Contraction/expansion due to changes in temperature

A

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Q. Which of the following relates the absorption & evolution of heat at the junctions of a thermocouple to the current flow in the circuit?

  • (A) Seebeck effect
  • (B) Peltier effect
  • (C) Joule heating effect
  • (D) Thomson effect

A

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Q. Turbine flow meters are suitable for

  • (A) Very limited flow ranges
  • (B) Cryogenic flow measurements
  • (C) Aerospace and in air borne applications
  • (D) Both B and C

A

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Q. Pick out the most suitable instrument for measuring temperature in the range of-40 to 425°C.

  • (A) Mercury thermometer
  • (B) Bimetallic thermometer
  • (C) Radiation pyrometer
  • (D) None of these

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Q. Compositional analysis of __________ is done using mass spectrometer.

  • (A) An isotope
  • (B) Natural gas
  • (C) A solid
  • (D) An alloy

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Q. Very low pressure is expressed in microns(μ), which is equal to __________ mm of Hg coloumn (absolute) at 0°C.

  • (A) 0.0001
  • (B) 0.001
  • (C) 0.01
  • (D) 0.1

A

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Q. Measurement of pressure in ammonia reactor is done by

  • (A) Bourdon gauge
  • (B) U-tube manometer
  • (C) Inclined tube manometer
  • (D) Pirani guage

A

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Q. With increase in temperature, the electrical conductivity of the platinum used in the resistance thermometer

  • (A) Increases
  • (B) Decreases
  • (C) Remains constant
  • (D) Increases exponentially

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