### Control System Objectives Part 09

**161 .** If the phase angle at the gain cross over point is κ then phase margin is **180+κ.**

**162 . ** Which of the following potentiometer has infinite resolution?** Deposited field potentiometer.**

**163 . ** Identify the electromechanical device **LVDT.**

**164 .** For a linear transfer function of the variable, the transfer function of the system **does not change.**

**165 . ** (π +2)(π +1)π 2(π +3)(π +4) is a **type 2 system**.

**166 . ** An ideal potentiometer should have **an infinite resolution.**

**167 . ** As compared to a potentiometer, which of the following is high for a LDT? **None of the above.**

**168 . ** The effect of adding poles and zeros can be determined quickly by **Bode Plot.**

**169 .** In steady state the velocity error of a type 1 system will** inversely proportional to gain constant of the system.**

**70 . ** A term not associated with potentiometer is **backlash.**

**171 .** Which of the following is incorrect? **Nyquist criterion is in time domain.**

**172 . ** In case the initial conditions of a system are specified to be zero, it implies that **the system is at rest without any stored energy.****Question 173 to 176 refer to data given below:**

The open loop transfer function of a system isH(s)G(s) =10s(π +2)(π +5)

**173 . ** The system is of type** N=1.**

**174 .** The value of ramp constant is** 1.5.**

**175 . ** The value of steady state error when the input signal is a step of magnitude** 2**, will be** 2.**

**176 .** According to Routh criterion, the system is** stable.****Question 177 to 181 refer to data given below:****Suppose an RLC electrical network with supply voltage u(t) and output voltage y(t) is described by**

d2yππ‘2 + 6 πyππ‘+ 25 y(t)= 50 u(t)

**177 . ** The transient behavior of this network would best be described as a **damped oscillation.**

**178 .** If a step voltage of 10 volts is the input what is the output steady state voltage? **20.**

**179 . ** The impulse response of this network would tend to** 0 value** as t approaches β.

**180.** The damping coefficient ΞΆ for the impulse response belongs to which category?** 0<ΞΆ<1.**