Top 80+ Solved Control System 2 MCQ Questions Answer
Q. What is the z-transform of the signal x[n] = anu(n)?
a. x(z) =1/z-1
b. x(z) = 1/1-z
c. x(z) = z/z-a
d. x(z) = 1/z-a
Q. Which one of the following rules determine the mapping of s-plane to z-plane?
a. right side of the s-plane maps into outside of the unit circle in z-plane
b. left half of s-plane maps into inside of the unit circle
c. imaginary axis in s-plane maps into the circumference of the unit circle
d. all of the mentioned
Q. Assertion (A): The z-transform of the output of the sampler is given by the series.Reason (R): The relationship is the result of the application of z = e-sT, where T stands for the time gap between the samples.
a. both a and r are true and r is correct explanation of a
b. both a and r are true but r is not correct explanation of a
c. a is true but r is false
d. a is false but r is true
Q. Inverse z-transform of the system can be calculated using:
a. partial fraction method
b. long division method
c. basic formula of the z-transform
d. all of the mentioned
Q. Difference equation model results in:
a. sampled-data systems
b. numerical analysis of continuous time systems
c. continuous time feedback systems
d. both a and b
Q. For relative stability of the system which of the following is sufficient?
a. gain margin
b. phase margin
c. both a and b
d. magnitude
Q. Stability of a system implies that :
a. small changes in the system input does not result in large change in system output
b. small changes in the system parameters does not result in large change in system output
c. small changes in the initial conditions does not result in large change in system output
d. small changes in the initial conditions result in large change in system output
Q. Linear mathematical model applies to :
a. linear systems
b. stable systems
c. unstable systems
d. all of the mentioned
Q. With feedback _____ reduces.
a. system stability
b. system gain
c. system stability and gain
d. damping
Q. Asymptotic stability is concerned with:
a. a system under influence of input
b. a system not under influence of input
c. a system under influence of output
d. a system not under influence of ou
Q. A linear time invariant system is stable if :
a. system in excited by the bounded input, the output is also bounded
b. in the absence of input output tends zero
c. both a and b
d. system in excited by the bounded input, the output is not bounded
Q. If a system is given unbounded input then the system is:
a. stable
b. unstable
c. not defined
d. linear
Q. If the impulse response in absolutely integrable then the system is :
a. absolutely stable
b. unstable
c. linear
d. stable
Q. If root of the characteristic equation has positive real part the system is :
a. stable
b. unstable
c. marginally stable
d. linear
Q. The use of sampled data control system are:
a. for using analog components as the part of the control loop
b. for time division of control components
c. whenever a transmission channel forms a part of closed loop
d. none of the mentioned