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

  • The response of two tanks of same size and resistance in series is


  • Options
  • A. under damped
  • B. critically damped
  • C. over damped
  • D. none of the above

  • Correct Answer
  • critically damped 

    • Process Control and Instrumentation problems

    Search Results

    • 1. The __________ of the fluid contained in the temperature sensing element (i.e., bulb) of filled system thermometers changes with change in temperature.

    • Options
    • A. pressure
    • B. volume
    • C. viscosity
    • D. all (a), (b) and (c)
      • Discuss
    • 2. Continuous measurement of moisture in paper is done by

    • Options
    • A. sling psychrometer.
    • B. hair-hygrometer.
    • C. weighing.
    • D. high resistance Wheatstone's bridge circuit.
      • Discuss
    • 3. An ideal PID controller has the transfer function . The frequency at which the magnitude ratio of the controller is 1, is

    • Options
    • A. 0.5/0.2
    • B. 0.2/0.5
    • C. 0.2 x 0.5
    • D. 1/0.2 x 0.5
      • Discuss
    • 4. For the block diagram shown below :

      The characteristic equation is

    • Options
    • A. ?l S (?ps + 1) + Kc . Kp (?lS + 1) e-?d s = 0
    • B. (?mS + 1) (?pS + 1) + Km . Kp e-?d S = 0
    • C. ?l S(?m S + 1) (?p S + 1) +Kc . Kp . Km (?l s + 1) e-?dS = 0
    • D. (?ms + 1) (?p s + 1) + Kc . Kp . Km . e-?dS = 0
      • Discuss
    • 5. Pressure of 0.0001 absolute psi can be measured by __________ gauge.

    • Options
    • A. Mcloid
    • B. Pirani
    • C. thermocouple
    • D. none of these
      • Discuss
    • 6. An amplitude ratio of 0.1 corresponds to __________ decibels.

    • Options
    • A. 20
    • B. -20
    • C. 10
    • D. -10
      • Discuss
    • 7. Which of the following is not a speed measuring instrument?

    • Options
    • A. Psychrometer
    • B. Stroboscope
    • C. Tachometer
    • D. All (a), (b) and (c)
      • Discuss
    • 8. The deflection of the free end of the bimetallic strips in a bimetallic thermometer with temperature is nearly

    • Options
    • A. linear
    • B. non-linear
    • C. parabolic
    • D. hyperbolic
      • Discuss
    • 9. The term analogous to the electrical current in a thermal system is the

    • Options
    • A. temperature difference
    • B. heat flow rate
    • C. heat content in the system
    • D. none of these
      • Discuss
    • 10. The unit step response of the transfer functionreaches its final steady state assymptotically after

    • Options
    • A. a monotonic increase.
    • B. a monotonic decrease.
    • C. initially increasing and then decreasing.
    • D. increasing decreasing and then increasing.
      • Discuss

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