Transfer function of transportation lag is___________________?

Related Mcqs:

1. Stability of a control system containing a transportation lag can be best analysed by_______________?

   A. Routh test
   B. Root locus methods
   C. Frequency response methods
   D. None of these

2. In a closed loop system, the process to be controlled is an integrating process with transfer function 1/2s. The controller proposed to be used in an integral controller with transfer function 1/T1s. When a step change in set point is applied to such a closed loop system, the controlled variable will exhibit__________________?

   A. Overdamped response
   B. Underdamped response
   C. Undamped response
   D. Unstable response

3. For two non-interacting first order systems connected in series, the overall transfer function is the ______________ of the individual transfer functions?

   A. Product
   B. Ratio
   C. Sum
   D. Difference

4. Phase lag of the sinusoidal response of a first order system is _________________?

   A. 120°
   B. 30°
   C. 180°
   D. 90°

5. Phase lag of the frequency response of a second order system to a sinusoidal forcing function______________?

   A. Is 30°
   B. Is 90° at the most
   C. Approaches 180° asymptotically
   D. Is 120°

6. According to Bode stability criterion, a system is unstable, if the open loop frequency response exhibits an amplitude ratio exceeding unity at frequency for which phase lag is_________________?

   A. 0°
   B. 45°
   C. 90°
   D. 180°

7. The time constant of a unity gain, first order plus time delay process is 5 min. If the phase lag at a frequency of 0.2 rad/min is 60°, then the dead time (in minutes) is________________?

   A. 5π/12
   B. π/6
   C. π/12
   D. π/3

8. Bode stability method uses ____________ loop transfer function?

   A. Open
   B. Closed
   C. Either A. or B.
   D. Neither A. nor B.

9. The open loop transfer function of a control system is KR/(1 + TS). This represents ______________?

   A. A first order system
   B. Dead time system
   C. A first order time lag
   D. A second order system

10. The transfer function for a P-D controller is________________?

    A. Kc(1+ηD s)
    B. Kc(1 +1/ηD s)
    C. Kc ηD s
    D. Kc/ηD s