Deck 3: Control Systems
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Deck 3: Control Systems
1
A signal other than the reference input that tends to affect the value of controlled variable is known as
A)disturbance
B)command
C)control element
D)reference input
A)disturbance
B)command
C)control element
D)reference input
disturbance
2
The transfer function is applicable to which of the following ?
A)Linear and time-in variant systems
B)Linear and time-variant systems
C)Linear systems
D)Non-linear systems
A)Linear and time-in variant systems
B)Linear and time-variant systems
C)Linear systems
D)Non-linear systems
Linear and time-in variant systems
3
From which of the following transfer function can be obtained ?
A)Signal flow graph
B)Analogous table
C)Output-input ratio
D)Standard block system
A)Signal flow graph
B)Analogous table
C)Output-input ratio
D)Standard block system
Signal flow graph
4
is the reference input minus the primary feedback.
A)Manipulated variable
B)Zero sequence
C)Actuating signal
D)Primary feedback
A)Manipulated variable
B)Zero sequence
C)Actuating signal
D)Primary feedback
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5
With feedback _____ increases.
A)system stability
B)sensitivity
C)gain
D)effects of disturbing signals
A)system stability
B)sensitivity
C)gain
D)effects of disturbing signals
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6
By which of the following the system response can be tested better ?
A)Ramp input signal
B)Sinusoidal input signal
C)Unit impulse input signal
D)Exponentially decaying signal
A)Ramp input signal
B)Sinusoidal input signal
C)Unit impulse input signal
D)Exponentially decaying signal
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7
In a system zero initial condition means that
A)The system is at rest and no energy is stored in any of its components
B)The system is working with zero stored energy
C)The system is working with zero reference signal
A)The system is at rest and no energy is stored in any of its components
B)The system is working with zero stored energy
C)The system is working with zero reference signal
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8
In a system low friction co-efficient facilitates
A)reduced velocity lag error
B)increased velocity lag error
C)increased speed of response
D)reduced time constant of the system
A)reduced velocity lag error
B)increased velocity lag error
C)increased speed of response
D)reduced time constant of the system
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9
Spring constant in force-voltage analogy is analogous to
A)capacitance
B)reciprocal of capacitance
C)current
D)resistance
A)capacitance
B)reciprocal of capacitance
C)current
D)resistance
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10
The frequency and time domain are related through which of the following?
A)Laplace Transform and Fourier Integral
B)Laplace Transform
C)Fourier Integral
D)Either (b) or (c)
A)Laplace Transform and Fourier Integral
B)Laplace Transform
C)Fourier Integral
D)Either (b) or (c)
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11
An increase in gain, in most systems, leads to
A)smaller damping ratio
B)larger damping ratio
C)constant damping ratio
D)none of the above
A)smaller damping ratio
B)larger damping ratio
C)constant damping ratio
D)none of the above
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12
Static error co-efficients are used as a measure of the effectiveness of closed loop systems for specified ________ input signal.
A)acceleration
B)velocity
C)position
D)all of the above
A)acceleration
B)velocity
C)position
D)all of the above
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13
A conditionally stable system exhibits poor stability at
A)low frequencies
B)reduced values of open loop gain
C)increased values of open loop gain
D)none of the above
A)low frequencies
B)reduced values of open loop gain
C)increased values of open loop gain
D)none of the above
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14
The type 0 system has ______ at the origin.
A)no pole
B)net pole
C)simple pole
D)two poles
A)no pole
B)net pole
C)simple pole
D)two poles
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15
The type 1 system has ______ at the origin.
A)no pole
B)net pole
C)simple pole
D)two poles
A)no pole
B)net pole
C)simple pole
D)two poles
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16
The type 2 system has at the origin.
A)no net pole
B)net pole
C)simple pole
D)two poles
A)no net pole
B)net pole
C)simple pole
D)two poles
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17
The position and velocity errors of a type-2 system are
A)constant, constant
B)constant, infinity
C)zero, constant
D)zero, zero
A)constant, constant
B)constant, infinity
C)zero, constant
D)zero, zero
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18
Velocity error constant of a system is measured when the input to the system is unit _______ function.
A)parabolic
B)ramp
C)impulse
D)step
A)parabolic
B)ramp
C)impulse
D)step
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19
In case of type-1 system steady state acceleration is
A)unity
B)infinity
C)zero
D)10
A)unity
B)infinity
C)zero
D)10
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20
If a step function is applied to the input of a system and the output remains below a certain level for all the time, the system is
A)not necessarily stable
B)stable
C)unstable
D)always unstable
A)not necessarily stable
B)stable
C)unstable
D)always unstable
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21
Which of the following is the best method for determining the stability and transient response ?
A)Root locus
B)Bode plot
C)Nyquist plot
D)None of the above
A)Root locus
B)Bode plot
C)Nyquist plot
D)None of the above
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22
Phase margin of a system is used to specify which of the following ?
A)Frequency response
B)Absolute stability
C)Relative stability
D)Time response
A)Frequency response
B)Absolute stability
C)Relative stability
D)Time response
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23
Addition of zeros in transfer function causes which of the following ?
A)Lead-compensation
B)Lag-compensation
C)Lead-lag compensation
D)None of the above
A)Lead-compensation
B)Lag-compensation
C)Lead-lag compensation
D)None of the above
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24
technique is not applicable to nonlinear system ?
A)Nyquist Criterion
B)Quasi linearization
C)Functional analysis
D)Phase-plane representation
A)Nyquist Criterion
B)Quasi linearization
C)Functional analysis
D)Phase-plane representation
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25
In order to increase the damping of a badly underdamped system which of following compensators may be used ?
A)Phase-lead
B)Phase-lag
C)Both (a) and (b)
D)Either (a) and (b)
A)Phase-lead
B)Phase-lag
C)Both (a) and (b)
D)Either (a) and (b)
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