• Electrical Engineering Reference

# Root Locus MCQ Questions And Answers - Control Systems

Root Locus MCQs : This section focuses on the "Root Locus" in Control Systems. These Multiple Choice Questions (MCQs) should be practiced to improve the Control Systems skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.

Question 1

The Root locus is the locus of the roots of the characteristic equation by varying system gain K from zero to ___________.

A. 1
B. -1
C. infinity
D. All of the above

Question 2

In root locus , G(s)H(s) represent?

A. K(N(s)+D(s))
B. K(N(s)-D(s))
C. K(N(s)*D(s))
D. K(N(s)/D(s))

Question 3

In root locus , if K = 0 then?

A. the closed loop poles are greater to open loop poles
B. the closed loop poles are equal to open loop poles
C. the closed loop poles are less to open loop poles
D. the closed loop poles are not equal to open loop poles

Question 4

In root locus , if K = infiinite then?

A. the closed loop poles are greater to open loop poles
B. the closed loop poles are equal to the open loop poles
C. the closed loop poles are less to open loop poles
D. the closed loop poles are not equal to open loop poles

Question 5

The angle condition is the point at which the angle of the open loop transfer function is an odd multiple of ?

A. 45 degree
B. 90 degree
C. 150 degree
D. 180 degree

Question 6

In the root locus diagram, we can observe the path of the closed loop poles.

A. TRUE
B. FALSE
C. Can be true or false
D. Can not say

Question 7

While increasing the value of gain K, the system becomes

A. More stable
B. Unstable
C. Less stable
D. Absolute stable

Question 8

Root locus is used to calculate:

A. Marginal stability
B. Absolute stability
C. Conditional stability
D. Relative stability

Question 9

Which one of the following applications softwareâ€™s is used to obtain an accurate root locus for?

A. LISP
B. MATLAB
C. dBase
D. Oracle