Control Systems Assessment Relative Stability Nyquist Criterion Online Exam Quiz
Control Systems Assessment Relative Stability Nyquist Criterion GK Quiz. Question and Answers related to Control Systems Assessment Relative Stability Nyquist Criterion. MCQ (Multiple Choice Questions with answers about Control Systems Assessment Relative Stability Nyquist Criterion
The phase angle of the system, G(s) =s+5/s2+4s+9, varies between :
Options
A : 0° and 90°
B : 0° and -90°
C : 0° and -180°
D : -90° and -180°
The phase margin (in degrees) of a system having the loop transfer function G(s) H(s)=2?3/s(s+1) is:
Options
A : 45°
B : -30°
C : 60°
D : 30°
The polar plot of the transfer function G(s) = 10(s+1)/s+10 will be in the :
Options
A : First quadrant
B : Second quadrant
C : Third quadrant
D : Fourth quadrant
Gain margin is:
Options
A : It is a factor by which the system gain can be increased to drive it to the verge of instability
B : It is calculated at gain cross over frequency
C : It is calculated at phase cross over frequency
D : Both a and c
Phase margin is:
Options
A : It is amount of additional phase lag at the gain cross over frequency required to bring the system to the verge of instability
B : It is always positive for stable feedback systems
C : It is calculated at gain cross over frequency
D : All of the mentioned
The concepts used to measure relative stability are:
Options
A : Phase margin
B : Gain margin
C : Phase and Gain margin
D : Stable
As the polar plot moves toward the point (-1, 0) then the system becomes :
Options
A : Stable
B : Marginally stable
C : Conditionally stable
D : Unstable
Polar plots moving toward the imaginary axis makes the system:
Options
A : Stable
B : Marginally stable
C : Conditionally stable
D : Unstable
Phase and gain margin are applicable to open and closed loop systems both.
Options
A : True
B : False
C :
D :
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