Number of poles in a system with transfer function 1/(s2 + 2s2 + 1) is ________________?

Related Mcqs:

1. 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

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

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

5. 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

6. ____________ stability method uses open loop transfer function?

   A. Nyquist
   B. Mikhailov
   C. Ruth
   D. None of these

7. Suppose that the gain, time constant and dead time of a process with the following transfer function: Gc(s) = 10 exp( – 0.1s)/(0.5s + 1) are known with a possible error of ± 20% of their values. The largest permissible gain Kc of a proportional controller needs to be calculated below taking the values of process gain, time constant and dead time as________________?

   A. 8, 0.6, 0.08
   B. 12, 0.6, 0.12
   C. 8, 0.6, 0.12
   D. 12, 0.4, 0.08

8. Transfer function of transportation lag is___________________?

   A. eTS
   B. e-TS
   C. 1/(Ts + 1)
   D. None of these

9. The unit step response of the transfer function 1/(s2 + 2s + 3) _______________________?

   A. Has a non-zero slope at the origin
   B. Has a damped oscillatory characteristics
   C. Is overdamped
   D. Is unstable

10. The root locus plot of the roots of the characteristics equation of a closed loop system having the open loop transfer function K (s + 1)/[2 (2s + 1) (3s + 1)] will have a definite number of loci for variation of K from 0 to ∞. The number of loci is_______________?

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