Cascade control means _______________?

Related Mcqs:

1. 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?

   A. Tank 1
   B. Tank 2
   C. Tank 3
   D. Tank 4

2. Positioning controllers are used for _______________?

   A. Low loads
   B. Temperature changes
   C. High loads
   D. Flow rate changes

3. Process degree of freedom indicates _______________ number of controllers to be used?

   A. The maximum
   B. The minimum
   C. Both maximum and the minimum
   D. Nothing about the

4. _______________ thermometer cannot measure sub-zero (< 0° C) temperature ?

   A. Mercury in glass
   B. Bimetallic
   C. Vapor pressure
   D. Resistance

5. The function of a transducer is to _______________ ?

   A. Modify the input signal
   B. Amplify the input signal
   C. Convert the primary signal into a more useful quantity, usually an electric impulse
   D. Codify/decodify the input signal

6. “A control system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at the crossover frequency.” This is _______________ criterion?

   A. Bode stability
   B. Nyquist
   C. Routh stability
   D. None of these

7. A negative gain margin expressed in decibels means a/an ____________ system?

   A. Stable
   B. Unstable
   C. Critically damped
   D. None of these

8. The Laplace transform of exp(at), where a > 0, is defined only for the Laplace parameter, s > a since______________?

   A. The function is exponential
   B. The Laplace transform of integral of exp(at) has finite values only for s > a
   C. The Laplace transform integral of exp(at) has initial values only for s > a
   D. The function exp(at) is piece-wise continuous only for s > a

9. Relationship between absorption/evolution of heat at the thermocouple junctions and the current flow in the circuit is given by _____________ effect?

   A. Peltier
   B. Thomson
   C. Seebeck
   D. None of these

10. The transfer function of a second order system is _____________________?

    A. 1/(T2s2 + 2ξTs + 1)
    B. 1/(T2s2 + 2Ts + 1)
    C. 1/(T2s2 + 2ξT + 1)
    D. None of these