Control System II Set 1
On This Page
This set of Control System 2 Multiple Choice Questions & Answers (MCQs) focuses on Control System II Set 1
Q1 | A control system working under unknown random action is called
- computer control system
- digital data system
- stochastic control system
- adaptive control system
Q2 | The first order control system, which is is well designed, has a
- small bandwidth
- negative time constant
- large negative transfer function pole
- none of the above
Q3 | Zero-order hold used in practical reconstruction of continuous-time signals is mathematically represented as a weighted-sum of rectangular pulsesshifted by:
- any multiples of the sampling interval
- integer multiples of the sampling interval
- one sampling interval
- 1 second intervals
Q4 | Sampling can be done by:
- impulse train sampling
- natural sampling
- flat-top sampling
- all of the mentioned
Q5 | The first step required to convert analog signal to digital is :
- sampling
- holding
- reconstruction
- quantization
Q6 | Sampling is necessary :
- in complex control systems
- where high accuracy is required
- non automated control systems
- automated control system
Q7 | _______________ is a sampling pattern which is repeated periodically
- single order sampling
- multi order sampling
- zero order sampling
- unordered sampling
Q8 | Aliasing is caused when:
- sampling frequency must be equal to the message signal
- sampling frequency must be greater to the message signal
- sampling frequency must be less to the message signal
- sampling frequency must be greater than or equal to the message signal
Q9 | The signal is reconstructed back with the help of
- zero order hold circuits
- extrapolations
- signal is reconstructed with zero order holds and extrapolations
- signal is not reconstructed
Q10 | A control system working under unknown random actions is called ---
- computer control system
- digital data system
- stochastic control system
- adaptive control system
Q11 | Zero initial condition for a system means
- input reference signal is zero
- zero stored energy
- no initial movement of moving parts
- system is at rest and no energy is stored in any of its components
Q12 | The first order control system ,which is well designed has a
- small bandwidth
- negative time constant
- large negative transfer function pole
- none of the above
Q13 | A zero order hold is used with sampled data system to
- make it critically damped
- reconstruct the sampled signal
- improve the stability of the system
- convert it to a continuous system
Q14 | A controller is basically a ---
- sensor
- comparator
- amplifier
- clipper
Q15 | Z and Laplace transform are related by:
- s = ln z
- s =ln z/t
- s =z
- s= t/ln z
Q16 | What is the z-transform of the signal x[n] = anu(n)?
- x(z) =1/z-1
- x(z) = 1/1-z
- x(z) = z/z-a
- x(z) = 1/z-a
Q17 | Which one of the following rules determine the mapping of s-plane to z-plane?
- right side of the s-plane maps into outside of the unit circle in z-plane
- left half of s-plane maps into inside of the unit circle
- imaginary axis in s-plane maps into the circumference of the unit circle
- all of the mentioned
Q18 | 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.
- both a and r are true and r is correct explanation of a
- both a and r are true but r is not correct explanation of a
- a is true but r is false
- a is false but r is true
Q19 | Inverse z-transform of the system can be calculated using:
- partial fraction method
- long division method
- basic formula of the z-transform
- all of the mentioned
Q20 | If the z transform of x(n) is X(z) =z(8z-7)/4z2-7z+3, then the final value theorem is :
- 1
- 2
- ∞
Q21 | Difference equation model results in:
- sampled-data systems
- numerical analysis of continuous time systems
- continuous time feedback systems
- both a & b
Q22 | Which of the following is an advantage of Laplace transform method
- it gives solution in frequency domain only
- it gives total solution more systematically
- initial conditions are incorporated in the very first step
- both b & c
Q23 | Analysis of control system by Laplace transform technique is not possible for
- discrete time systems
- linear systems
- time invarient systems
- unstable continuous time systems
Q24 | Z-transform is used in:
- continuous optimal control problem
- discrete optimal problem
- control systems
- none of the mentione
Q25 | Unit step response of the system described by the equation y(n) +y(n-1) =x(n) is:
- z2/(z+1)(z-1)
- z/(z+1)(z-1)
- z+1/z-1
- z(z-1)/z+1