Z & S Domain Relationship
Z & S Domain Relationship 1. The auto-correlation function of a rectangular pulse of duration T is a) A rectangular pulse of duration T b) A rectangular pulse of duration…
Z-transform Analysis of Sampled-Data Control Systems
Z-transform Analysis of Sampled-Data Control Systems 1. The DFT of a signal x(n) of length N is X(k). When X(k) is given and x(n) is computed from it, the length…
The inverse z-transform & Response of Linear Discrete Systems
The inverse z-transform & Response of Linear Discrete Systems 1. Unit step response of the system described by the equation y(n) +y(n-1) =x(n) is: a) z2/(z+1)(z-1) b) z/(z+1)(z-1) c) z+1/z-1…
The Z-Transfer Function
The Z-Transfer Function 1. Consider the following statements regarding a linear discrete-time system: H (z) = z2+1/(z+0.5)(z-0.5) 1. The system is stable 2. The initial value of h(0) of the…
The Z-Transform
The Z-Transform 1. The discrete-time signal x (n) = (-1)n is periodic with fundamental period a) 6 b) 4 c) 2 d) 0 Answer: c Explanation: Period of the signal refers…
Difference Equations
Difference Equations 1. 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 Answer: d…
Signal Reconstruction
Signal Reconstruction 1. Sampling can be done by: a) Impulse train sampling b) Natural sampling c) Flat-top sampling d) All of the mentioned Answer: d Explanation: Sampling is the process…
Spectrum Analysis of Sampling Process
Spectrum Analysis of Sampling Process 1. Statement (I): Aliasing occurs when the sampling frequency is less than twice the maximum frequency in the signal. Statement (II): Aliasing is a reversible…
Feedback Compensation
Feedback Compensation 1. Which of the following are the not characteristics of the closed loop systems? a) It does not compensate for disturbance b) It reduces the sensitivity of plant-parameter…
Tuning of PID Controllers
Tuning of PID Controllers 1. The input of a controller is a) Sensed signal b) Error signal c) Desired variable value d) Signal of fixed amplitude not dependent on desired…
