Govt Exams Mock Test FREE | Online Quiz Competition

Q1. The Nyquist plot of loop transfer function \(G(s) H(s)\) of a close loop passing through the point \((-1 + j0)\) in \(G(S) H(S)\) plane. The phase margin of the system is

\(0^o\)

\(45^o\)

\(90^o\)

\(180^o\)

Q2. The phase shift of \(G(s) = \frac{1}{s^2}\) is

\(90^o\)

\(-90^o\)

\(180^o\)

\(-180^o\)

Q3. The lead compensator used for a close loop controller has following transfer function \(K\frac{(1 + \frac{s}{a})}{(1+ \frac{s}{b})}\) for such a lead compensator

\(a < b\)

\( a > b\)

\( a > Kb \)

\(a < Kb \)

Q4. In a stable control system backlash can cause which of the following?

Overdamping

Low-level oscillations

Underdamping

Poor stability at reduced values of open loop gain

Q5. If the magnitude of \(G(j\omega )H(j\omega)\) at phase crossover frequency is \(0.5\). Find the gain margin of the given system?

0.5

2

1

4

Q6. On which of the following factors does the sensitivity of a closed loop system to gain changes and load disturbances depend ?

Frequency

Loop gain

Forward gain

All of the above

Q7. The type of a transfer function denotes the number of

Poles at origin

Zeros at origin

Finite poles

Poles at infinity

Q8. Output of the feedback control system should be a function of

Input

Reference and output

Feedback signal

None of these

Q9. The peak overshoot of the step response of an under damped second order system is an explicit indication of

Damping ratio

Natural frequency

Settling time

Steady state time

Q10. The steady-state error of a control system is affected by the type of:

Input signal

Controller used

System's time constant

Damping ratio

Quiz

Year 2024

September
Week # 1 Quiz 4

Q1. The Nyquist plot of loop transfer function \(G(s) H(s)\) of a close loop passing through the point \((-1 + j0)\) in \(G(S) H(S)\) plane. The phase margin of the system is

Q2. The phase shift of \(G(s) = \frac{1}{s^2}\) is

Q3. The lead compensator used for a close loop controller has following transfer function \(K\frac{(1 + \frac{s}{a})}{(1+ \frac{s}{b})}\) for such a lead compensator

Q4. In a stable control system backlash can cause which of the following?

Q5. If the magnitude of \(G(j\omega )H(j\omega)\) at phase crossover frequency is \(0.5\). Find the gain margin of the given system?

Q6. On which of the following factors does the sensitivity of a closed loop system to gain changes and load disturbances depend ?

Q7. The type of a transfer function denotes the number of

Q8. Output of the feedback control system should be a function of

Q9. The peak overshoot of the step response of an under damped second order system is an explicit indication of

Q10. The steady-state error of a control system is affected by the type of:

Quiz

Year 2024

December Week # 1 Expire on 31 Dec 2024

December Week # 2 Expire on 07 Jan 2025

December Week # 3 Expire on 14 Jan 2025

December Week # 4 Expire on 21 Jan 2025

September Week # 1 Quiz 4

Q1. The Nyquist plot of loop transfer function \(G(s) H(s)\) of a close loop passing through the point \((-1 + j0)\) in \(G(S) H(S)\) plane. The phase margin of the system is

Q2. The phase shift of \(G(s) = \frac{1}{s^2}\) is

Q3. The lead compensator used for a close loop controller has following transfer function \(K\frac{(1 + \frac{s}{a})}{(1+ \frac{s}{b})}\) for such a lead compensator

Q4. In a stable control system backlash can cause which of the following?

Q5. If the magnitude of \(G(j\omega )H(j\omega)\) at phase crossover frequency is \(0.5\). Find the gain margin of the given system?

Q6. On which of the following factors does the sensitivity of a closed loop system to gain changes and load disturbances depend ?

Q7. The type of a transfer function denotes the number of

Q8. Output of the feedback control system should be a function of

Q9. The peak overshoot of the step response of an under damped second order system is an explicit indication of

Q10. The steady-state error of a control system is affected by the type of:

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September
Week # 1 Quiz 4