Electrical Engg (EEE) - MCQ Practice Questions

In a compensated system, if phase margin PM = 30° and gain margin GM = 8 dB, this indicates:

For a unity feedback control system with G(s) = 10/[s(s+5)], the static velocity error constant Kv is:

A system exhibits steady-state error of 0.2 for unit ramp input with loop gain K = 50. The static velocity error constant is:

The Nyquist stability criterion states that for stability, the Nyquist plot should not encircle:

A control system with gain margin of 6 dB means:

The settling time of a second-order underdamped system is approximately given by:

In state-space representation, observability matrix rank should be equal to:

A lead compensator with transfer function Gc(s) = (1 + aTs)/(1 + Ts) where a > 1 provides:

A system with transfer function H(s) = 100/(s² + 10s + 100) has natural frequency ωₙ and damping ratio ζ respectively as:

Peak overshoot of underdamped second-order system depends on:

In compensator design, if both transient and steady-state improvements are needed, which approach is preferred?

For a closed-loop control system with unity feedback, increasing proportional gain K primarily causes:

Which of the following correctly represents the Nyquist stability criterion?

For the state-space system: ẋ = Ax + Bu, y = Cx + Du. The controllability matrix rank must equal n for the system to be completely state controllable. What is n?

In a lag-lead compensator design for a Type 1 system, what is the primary purpose of the lag section?

Which stability criterion is based on Lyapunov's second method?

In root locus, the breakaway point on the real axis occurs where:

A proportional controller with Kp = 10 is applied to a unity feedback system with G(s) = 1/[s(s+2)]. The velocity error constant Kv is:

In phase plane analysis, what does a limit cycle represent?

The Bode magnitude plot of G(s) = 100/(s+10) at ω = 10 rad/s shows: