The second order system with the transfer function 4/(s2 + 2s + 4) has a damping ratio of ___________________?

Related Mcqs:

1. 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

2. 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

3. 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

4. The root locus method, a pole of a transfer function G(s) is the value of s for which G(s) approaches ___________________?

   A. -1
   B. 0
   C. 1
   D. ∞

5. The open loop transfer function of a process is K [{(s + 1) (s + 4)}/{(s + 2) (s + 3)}]. In the root locus diagram, the poles will be at ___________________?

   A. -1, -4
   B. 1, 4
   C. -2, -3
   D. 2, 3

6. When the damping co-efficient (ξ) is unity, the system is __________________?

   A. Overdamped
   B. Critically damped
   C. Underdamped
   D. Highly fluctuating

7. The frequency response of a dynamic element shows a constant magnitude ratio at all frequencies. The element exhibits a negative phase shift at all frequencies. The absolute value of the phase shift increases linearly with frequency. The element has the transfer function ?

   A. e-ηS
   B. (T1S + 1)/(T2S + 1)
   C. (T1S/(T2S + 1)
   D. (T1S + 1)/(T2S

8. An ideal PID controller has the transfer function [1 + (1/0.55) + 0.25]. The frequency at which the magnitude ratio of the controller is 1, is________________?

   A. 0.5/0.2
   B. 0.2/0.5
   C. 0.2 × 0.5
   D. 1/√(0.2 × 0.5)

9. The transfer function of a first order system is______________?

   A. 1/(Ts + 1)
   B. 1/Ts
   C. s/(Ts + 1)
   D. None of these

10. A system with transfer function [(2S/4S) + 1] is of _____________ order?

    A. Zero
    B. 1st
    C. 2nd
    D. 3rd