Control System Engineering MCQs | Page - 6

Dear candidates you will find MCQ questions of Control System Engineering here. Learn these questions and prepare yourself for coming examinations and interviews. You can check the right answer of any question by clicking on any option or by clicking view answer button.

📊 Control System Engineering
Q. The constant M-circle represented by the equation x^2+2.25x+y^2=-1.25 has the value of M equal to:
  • (A) 1
  • (B) 2
  • (C) 3
  • (D) 4
💬 Discuss
✅ Correct Answer: (C) 3

Explanation: comparing with the m circle equation we have the value of m =3.

📊 Control System Engineering
Q. What is the value of M for the constant M circle represented by the equation 8x2+18x+8y2+9=0?
  • (A) 0.5
  • (B) 2
  • (C) 3
  • (D) 8
💬 Discuss
✅ Correct Answer: (C) 3

Explanation: comparing with the m circle equation we have the value of m =3.

📊 Control System Engineering
Q. The constant N loci represented by the equation x^2+x+y^2=0 is for the value of phase angle equal to:
  • (A) -45°
  • (B) 0°
  • (C) 45°
  • (D) 90°
💬 Discuss
✅ Correct Answer: (D) 90°

Explanation: centre = (-0.5, 0) centre of n circle is (-1/2, 1/2n)

📊 Control System Engineering
Q. 4 DESIGN OF COMPENSATORS USING BODE PLOT
  • (A) -1 and origin
  • (B) origin and +1
  • (C) -0.5 and 0.5
  • (D) -1 and +1
💬 Discuss
✅ Correct Answer: (A) -1 and origin

Explanation: centre of n circle is (-1/2, 1/2n)

📊 Control System Engineering
Q. Which one of the following statements is correct? Nichol’s chart is useful for the detailed study analysis of:
  • (A) closed loop frequency response
  • (B) open loop frequency response
  • (C) close loop and open loop frequency responses
  • (D) none of the above
💬 Discuss
✅ Correct Answer: (A) closed loop frequency response

Explanation: nichol’s chart is useful for the detailed study analysis of closed loop frequency response.

📊 Control System Engineering
Q. Frequency range of bode magnitude and phases are decided by :
  • (A) the lowest and higher important frequencies of dominant factors of the oltf
  • (B) the lowest and highest important frequencies of all the factors of the open loop transfer function
  • (C) resonant frequencies of the second factors
  • (D) none of the above
💬 Discuss
✅ Correct Answer: (D) none of the above

Explanation: t. f. = kp (1+tds)

📊 Control System Engineering
Q. OLTF contains one zero in right half of s- plane then
  • (A) open loop system is unstable
  • (B) close loop system is unstable
  • (C) close loop system is unstable for higher gain
  • (D) close loop system is stable
💬 Discuss
✅ Correct Answer: (C) close loop system is unstable for higher gain

Explanation: oltf contains one zero in right half of s-plane then close loop system is unstable for higher gain.

📊 Control System Engineering
Q. The critical value of gain for a system is 40 and gain margin is 6dB. The system is operating at a gain of:
  • (A) 20
  • (B) 40
  • (C) 80
  • (D) 120
💬 Discuss
✅ Correct Answer: (A) 20

Explanation: gm (db) = 20loggm gm =2

📊 Control System Engineering
Q. Nichol’s chart is useful for the detailed study and analysis of:
  • (A) closed loop frequency response
  • (B) open loop frequency response
  • (C) close loop and open loop frequency responses
  • (D) open loop and close loop frequency responses
💬 Discuss
✅ Correct Answer: (A) closed loop frequency response

Explanation: nichol’s chart is useful for the detailed study and analysis of closed loop frequency response.

📊 Control System Engineering
Q. The roots of the characteristic equation of the second order system in which real and imaginary part represents the :
  • (A) damped frequency and damping
  • (B) damping and damped frequency
  • (C) natural frequency and damping ratio
  • (D) damping ratio and natural frequency
💬 Discuss
✅ Correct Answer: (B) damping and damped frequency

Explanation: real part represents the damping and imaginary part damped frequency.

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