### Control System Objectives Part 07

**121 . ** Which one of the following must have negative real parts for a stable system? **The system eigen values.**

**122 . ** A type 1 system under parabolic input will have **actuating signal which will increase with time.**

**123 . ** The transfer function of a system is10(1+0.2s)1+0.5π The phase shift at w=0 and w=β be(**none of the above)**

**124 .** The Bode plot of a transfer function G(s)=s** is 20 dB/decade and phase shift of Ο/2.**

**125 .** The decade frequency range is specified by** π°πππ=10**

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**126 . ** It is found that the complete response of a system is given by the following equation Y(t)= 5 + 3 sin (κt + πΏ1) +e-3tsin (κt + πΏ20+ e5t) The steady state part of the above expression is given by**5 + 3 sin (κt + πΏ1)**

**127 . ** The servo systems with step acceleration input is a** type 2 system.**

**128 .** Which of the following is the source of non-linearity? **Backlash in gears, Threshold in seasons & Saturation in effects in amplifiers (All of the above).**

**129 .** A differentiator is usually not a part of a control system because** it increases input noise.**

**30 .** Frequency domain analysis is preferred when dealing with systems having input as **sinusoidal with variable frequency and amplitude.**

**131 . ** A system is critically damped. Now if the gain of the system is increased the system will behave as **under damped.**

**132 .** The transfer function for the circuit shown in Fig. 26 when there is no external load, will be**κπ¨κπ’=ππ»ππ»πs2+π»ππ+π**

**133 . ** The response of a control system having damping factor as unity will be **critically damped.Questions 134 to 136 refer to Fig. 27**

**134 .** The unit impulse test signal is represented by **figure C.**

**135 .** The ramp test signal is represented by** Figure B.**

**136 .** Damping is proportional to**πβππππ.**

**137 . ** Integral error compensation in a control system **minimize steady state error.**

**138 . ** For the mechanical system shown in Fig. 28 (a) as the force voltage analogous circuit is represented by (in Fig. 28 (b) ) **Figure C.**

**139 . ** Which of the following is not in frequency domain?** Root Locus Plot.**

**40 . ** The torque speed characteristics of ac servo motor is closer to **Curve C.**