Control System II Set 2
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This set of Control System 2 Multiple Choice Questions & Answers (MCQs) focuses on Control System II Set 2
Q1 | Difference equation model results in:
- sampled-data systems
- numerical analysis of continuous time systems
- continuous time feedback systems
- both a and b
Q2 | For relative stability of the system which of the following is sufficient?
- gain margin
- phase margin
- both a and b
- magnitude
Q3 | Stability of a system implies that :
- small changes in the system input does not result in large change in system output
- small changes in the system parameters does not result in large change in system output
- small changes in the initial conditions does not result in large change in system output
- small changes in the initial conditions result in large change in system output
Q4 | Linear mathematical model applies to :
- linear systems
- stable systems
- unstable systems
- all of the mentioned
Q5 | With feedback _____ reduces.
- system stability
- system gain
- system stability and gain
- damping
Q6 | Asymptotic stability is concerned with:
- a system under influence of input
- a system not under influence of input
- a system under influence of output
- a system not under influence of ou
Q7 | A linear time invariant system is stable if :
- system in excited by the bounded input, the output is also bounded
- in the absence of input output tends zero
- both a and b
- system in excited by the bounded input, the output is not bounded
Q8 | If a system is given unbounded input then the system is:
- stable
- unstable
- not defined
- linear
Q9 | If the impulse response in absolutely integrable then the system is :
- absolutely stable
- unstable
- linear
- stable
Q10 | If root of the characteristic equation has positive real part the system is :
- stable
- unstable
- marginally stable
- linear
Q11 | The use of sampled data control system are:
- for using analog components as the part of the control loop
- for time division of control components
- whenever a transmission channel forms a part of closed loop
- none of the mentioned
Q12 | Jury’s test determines whether the roots of a polynomial lie:
- close to unit circle
- within the unit circle
- outside the unit circle
- on the unit circle
Q13 | The transformation technique in which there is one to one mapping from s-domain to z-domain is
- approximation of derivatives
- impulse invariance method
- bilinear transformation method
- backward difference for the derivative
Q14 | Parallel form of realisation is done in
- high speed filtering applications
- low speed filtering applications
- both a and b
- none of the above
Q15 | In cascade form of realization, how many bits should be used to represent the FIR filter coefficients in order to avoid the quantization effect onfilter coefficients?
- 5 to 10
- 12 to 14
- 20 to 24
- 28 to 40
Q16 | How is the sampling rate conversion achieved by factor I/D?
- by increase in the sampling rate with (i)
- by filtering the sequence to remove unwanted images of spectra of original signal
- by decimation of filtered signal with factor d
- all of above
Q17 | In the cascaded form of realisation, the polynomials are factored into
- product of 1st-order and 2nd-order polynomials
- product of 2nd-order and 3rd-order polynomials
- sum of 1st-order and 2nd-order polynomials
- sum of 2nd-order and 3rd-order polynomials
Q18 | Open loop transfer function of a system having one zero with a positive real value is called.
- zero phase function
- negative phase function
- positive phase function
- non-minimum phase function
Q19 | Consider the function F (s)= 5/s(s2+3s+2), the initial value of f(t) is:
- 5
- 5/2
- 5/3
Q20 | In a closed loop for which the output is the speed of the motor, the output rate control can be used to:
- limit the speed of the motor
- limit the torque output of the motor
- reduce the damping of the system
- limit the acceleration of the motor
Q21 | The transfer function of any stable system which has no zeros or poles in the right half of the s-plane is said to be:
- minimum phase transfer function
- non-minimum phase transfer function
- minimum phase frequency response function
- minimum gain transfer function
Q22 | State model representation is possible using _________
- physical variables
- phase variables
- canonical state variables
- all of the above
Q23 | Conventional control theory is applicable to ______ systems
- siso
- mimo
- time varying
- non-linear
Q24 | The transfer function for the state representation of the continuous time LTI system: dq(t)/dt=Aq(t)+Bx(t)Y(t)=Cq(t)+Dx(t) is given by
- c(si-a)-1b+d
- b(si-a)-1b+d
- c(si-a)-1b+a
- d(si-a)-1b+c
Q25 | The system which works on the initial condition without any input applied to it is called as :
- homogeneous system
- non homogeneous system
- linear system
- non linear system