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Home ‣ Chemical Engineering ‣ Process Control and Instrumentation Comments
  • Question

  • What is the Laplace transform of impulse input having magnitude 'X'?


  • Options
  • A. X
  • B. X2
  • C. 1/X
  • D. 1

  • Correct Answer
  • 1 

    • Process Control and Instrumentation problems

    Search Results

    • 1. Maximum differential pressure in liquid manometer is __________ psi.

    • Options
    • A. 20
    • B. 30
    • C. 40
    • D. 50
      • Discuss
    • 2. Phase margin is equal to

    • Options
    • A. 180° - phase lag
    • B. phase lag - 180°
    • C. phase lag + 180°
    • D. phase lag + 90°
      • Discuss
    • 3. Meleoid gauge measures the __________ pressure.

    • Options
    • A. positive
    • B. sub-atmospheric
    • C. very high
    • D. atmospheric
      • Discuss
    • 4. Cascade control means

    • Options
    • A. feed forward control.
    • B. more than one feed-back loop.
    • C. on-off control.
    • D. one feed-back loop.
      • Discuss
    • 5. Which of the following shows maximum dip effect (indicating reverse direction of temperature change)?

    • Options
    • A. Mercury thermometer
    • B. Radiation pyrometer
    • C. Bimetallic thermometer
    • D. Thermocouple
      • Discuss
    • 6. Which of the following is not classified as a thermo electric pyrometer?

    • Options
    • A. Resistance thermometer.
    • B. Thermocouple.
    • C. Optical pyrometer (disappearing filament type)
    • D. Radiation pyrometer
      • Discuss
    • 7. Liquid flow rate in an open channel can not be measured by a/an

    • Options
    • A. orifice meter
    • B. cipolletti weir
    • C. rectangular weir
    • D. V-notch
      • Discuss
    • 8. Water is flowing through a series of four tanks and getting heated as shown in figure. It is desired to design a cascade control scheme for controlling the temperature of water leaving the tank 4 as there is a disturbance in the temperature of a second stream entering the tank 2. Select the best place to take the secondary measurement for the second loop.

    • Options
    • A. Tank 1
    • B. Tank 2
    • C. Tank 3
    • D. Tank 4
      • Discuss
    • 9. Which of the following filled system expansion thermometers has the lowest positive temperature measurement capability?

    • Options
    • A. Mercury in glass thermometer.
    • B. Alcohol in glass thermometer.
    • C. Fused metal (Na or K) in steel thermometer.
    • D. Nitrogen in steel thermometer.
      • Discuss
    • 10. Non-metallic diaphragm used as pressure sensor in instruments is generally made of

    • Options
    • A. teflon
    • B. synthetic rubber
    • C. bakelite
    • D. thick paper
      • Discuss

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