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…
Cascade Compensation in Frequency Domain
Cascade Compensation in Frequency Domain 1. A phase lead compensation leads to: a) Increase in overshoot b) Reduction in bandwidth of closed loop system c) Reduction in rise time of…
Cascade Compensation in Time Domain
Cascade Compensation in Time Domain 1. A proportional controller leads to: a) Zero steady state error for step input for type 1 system b) Zero steady state error for step…
Realization of Basic Compensators
Realization of Basic Compensators 1. Which of the following is not the correct reason to select feedback compensation over cascaded one? a) No amplification is required as the energy transfer…
