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Control Systems Multiple Choice Questions | MCQs | Quiz

Control Systems Interview Questions and Answers
Practice Control Systems questions and answers for interviews, campus placements, online tests, aptitude tests, quizzes and competitive exams.

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•   Robotic Mechanisms
•   Transfer Functions
•   Algebra Block Diagram
•   Signal Flow Graphs
•   Feedback Systems
•   Disturbance Signal Effect
•   Linearizing Effect
•   Nonlinear Systems
•   Controller Components-1
•   Controller Components-2
•   Stepper Motors
•   Hydraulic Systems
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•   Standard Signals Test
•   First Order Systems
•   Second Order Systems-1
•   Second Order Systems-2
•   Second Order Systems-3
•   Second Order Systems-4
•   Steady-State Errors
•   Zero System Effect - 1
•   Zero System Effect - 2
•   Higher-Order Systems
•   Performance Indices
•   Robotic Control System-1
•   Robotic Control System-2
•   State Variable Analysis-1
•   State Variable Analysis-2
•   Lower Order Systems
•   Stability Concept
•   Stability Conditions
•   Routh-Hurwitz Stability
•   Relative Stability Analysis
•   Root Locus Concepts
•   Root Locus
•   Root Loci Construction
•   Frequency Response
•   Time & Frequency
•   Polar Plots
•   Bode Plots
•   Minimum-Phase Systems
•   Transfer Functions
•   Mathematical Preliminarie
•   Nyquist Stability Criterion
•   Time Domain Analysis
•   Relative Stability
•   Closed-Loop Frequency
•   Design Problem
•   Classical Design
•   Basic Compensators
•   Cascade Compensation
•   Frequency Domain
•   PID Controllers
•   Feedback Compensation
•   Spectrum Analysis
•   Signal Reconstruction
•   Difference Equations
•   Z-Transform
•   Z-Transfer Function
•   Inverse Z-transform
•   Z-transform Analysis
•   Z & S Relationship
•   Stability Analysis
•   Compensation Technique
•   State Variables & Model
•   Linear State Models
•   State Variables
•   Diagonalization
•   State Equations Solution
•   Controlability
•   Pole Placement
•   Observer Systems
•   Liapunov's Stability - 1
•   Liapunov's Stability - 2
•   Linear Systems
•   Servomechanims
•   Optimal Control Problem1
•   Optimal Control Problem2
•   State Regulator Problem
•   Time Regulator Problem
•   Tracking Problem
•   Parameter Optimization
•   Physical Nonlinearities
•   Nonlinear Stability - 1
•   Nonlinear Stability - 2
•   Phase-Trajectories - 1
•   Phase-Trajectories - 2
•   Stability Analysis
•   Adaptive Control
•   Fuzzy Logic Control
•   Neural Networks

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Control Systems Questions and Answers – The Z-transform Analysis of Sampled-Data Control Systems

Posted on May 21, 2017 by Manish

This set of Control Systems Multiple Choice Questions & Answers (MCQs) focuses on “The 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 of x(n)
a) Is increased to infinity
b) Remains N
c) Becomes 2N – 1
d) Becomes N2
View Answer

Answer: a
Explanation: When X (k) is given and x (n) is computed from it, the length of x (n) is increased to infinity.
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2. The system having input x (n) related to output y(n) as y (n) = log |x (n)| is:
a) Nonlinear, causal, stable
b) Linear, noncausal, stable
c) Nonlinear, causal, not stable
d) Linear, noncausal, not stable
View Answer

Answer: a
Explanation: As y (n) is the function of x (n) hence it is nonlinear but it is bounded and also depends upon past and present values therefore it is stable and causal respectively.

3. Zero-order hold used in practical reconstruction of continuous-time signals is mathematically represented as a weighted-sum of rectangular pulses shifted by:
a) Any multiples of the sampling interval
b) Integer multiples of the sampling interval
c) One sampling interval
d) 1 second intervals
View Answer

Answer: b
Explanation: Zero-order hold is used to reconstruct the continuous-time signal which is represented as a weighted sum of rectangular pulses shifted by integer multiples of the sampling interval.

4. When two honest coins are simultaneously tossed, the probability of two heads on any given trial is:
a) 1
b) 3/4
c) 1/2
d) ¼
View Answer

Answer: d
Explanation: Total outcomes =4
Favorable outcomes =1
Hence probability =1/4.
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5. A continuous-time periodic signal x(t), having a period T, is convolved with itself. The resulting signal is
a) Not periodic
b) Periodic having a period T
c) Periodic having a period 2T
d) Periodic having a period T/2
View Answer

Answer: b
Explanation: Periodic having a period T Convolution of a periodic signal (period T) with itself will give the same period T.

6. If the Fourier series coefficients of a signal are periodic then the signal must be
a) Continuous-time, periodic
b) Discrete-time, periodic
c) Continuous-time, non-periodic
d) Discrete-time, non-periodic
View Answer

Answer: b
Explanation: Discrete-time, periodic these are the properties of the discrete-time periodic signal.

7. The region of convergence of a causal finite duration discrete-time signal is
a) The entire z-plane except z = 0
b) The entire z-plane except z = ∞
c) The entire z-plane
d) A strip in z-plane enclosing jω–axis
View Answer

Answer: a
Explanation: For discrete time signal for any causal system the region of convergence is always entire z-plane but except z =0.
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8. The probability cumulative distribution function must be monotone and
a) Increasing
b) Decreasing
c) Non-increasing
d) Non-decreasing
View Answer

Answer: d
Explanation: The cumulative distribution function that is monotone and non-decreasing or can be increasing.

9. Convolution is used to find:
a) The impulse response of an LTI System
b) Frequency response of a System
c) The time response of a LTI system
d) The phase response of a LTI system
View Answer

Answer: c
Explanation: Convolution is the combination of addition and multiplication of the signals and used to find the impulse response of the LTI system.

10. The Fourier Transform of a rectangular pulse is
a) Another rectangular pulse
b) Triangular pulse
c) Sinc function
d) Impulse
View Answer

Answer: c
Explanation: The Fourier Transform of a rectangular pulse that is the sinc function.

Sanfoundry Global Education & Learning Series – Control Systems.
To practice all areas of Control Systems, here is complete set of 1000+ Multiple Choice Questions and Answers.

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