Question 1

is the reference input minus the primary feedback.
A)manipulated variable
B)zero sequence
C)actuating signal
D)primary feedback

Accepted Answer

The actuating signal is the difference between the reference input and the primary feedback. This signal is what drives the system to correct any error by adjusting the process through the manipulated variable.

Question 2

With feedback _____ increases.
A)system stability
B)sensitivity
C)gain
D)effects of disturbing signals

Accepted Answer

Feedback generally increases system stability by reducing the effects of disturbances and improving the system's ability to maintain desired performance.

Question 3

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

Accepted Answer

A unit impulse signal contains all frequencies, allowing for a comprehensive analysis of the system's frequency response, making it better for testing the system response across a wide range of frequencies.

Question 4

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

Accepted Answer

Reduced velocity lag error occurs when the system has low friction, as friction opposes motion and causes a delay in the system's response.

Question 5

Spring constant in force-voltage analogy is analogous to
A)capacitance
B)reciprocal of capacitance
C)current
D)resistance

Accepted Answer

In the force-voltage analogy, the spring constant (stiffness) is analogous to the reciprocal of capacitance, as both relate to the storage of potential energy.

Question 6

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)

Accepted Answer

The answer of The frequency and time domain are related...

Question 7

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

Accepted Answer

An increase in gain typically results in a smaller damping ratio because it amplifies the system's response to inputs, making it more prone to oscillations and less damped.

Question 8

specified ________ input signal.
A)acceleration
B)velocity
C)position
D)all of the above

Accepted Answer

All of the above (acceleration, velocity, and position) can be specified as input signals in various systems and applications, such as control systems, motion control, and signal processing.

Question 9

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

Accepted Answer

A conditionally stable system exhibits poor stability at reduced values of open loop gain.

Question 10

The type 0 system has ______ at the origin.
A)no pole
B)net pole
C)simple pole
D)two poles

Accepted Answer

The type 0 system has no pole at the origin because the net charge inside a Gaussian surface surrounding the origin is zero.

Question 11

The type 1 system has ______ at the origin.
A)no pole
B)net pole
C)simple pole
D)two poles

Accepted Answer

Type 1 systems have a single (simple) pole at the origin, which is characteristic of systems that can track a step input with zero steady-state error.

Question 12

The type 2 system has ______ at the origin.
A)no net pole
B)net pole
C)simple pole
D)two poles

Accepted Answer

A type 2 system has two poles at the origin, which means it has an integrator of order 2 in its transfer function.

Question 13

The position and velocity errors of a type-2 system are
A)constant, constant
B)constant, infinity
C)zero, constant
D)zero, zero

Accepted Answer

A type-2 system has two integrators in its forward path, which means it has a steady-state position error of zero for a step input and a steady-state velocity error of zero for a ramp input. However, for the velocity error with a step input, it remains constant, not zero.

Question 14

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

Accepted Answer

The velocity error constant of a system is measured when the input to the system is a unit ramp function. This constant evaluates the system's ability to follow a ramp input without steady-state error.

Question 15

In case of type-1 system steady state acceleration is
A)unity
B)infinity
C)zero
D)10

Accepted Answer

The answer of In case of type-1 system steady state...

Question 16

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

Accepted Answer

A system is not necessarily stable if the output remains below a certain level for all time, as stability also requires that the output eventually settles to a steady state or equilibrium.

Question 17

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

Accepted Answer

Root locus is a graphical method used to determine the stability and transient response of a control system by showing how the poles of a system change with variation of a certain parameter, typically gain.

Question 18

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

Accepted Answer

Phase margin is a measure of the system's relative stability in the frequency domain. It indicates how far the system is from becoming unstable in terms of phase. A higher phase margin means the system is more stable.

Question 19

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

Accepted Answer

The answer of Addition of zeros in transfer function causes...

Question 20

technique is not applicable to nonlinear system ?
A)nyquist criterion
B)quasi linearization
C)functional analysis
D)phase-plane representation

Accepted Answer

The Nyquist criterion is primarily applicable to linear systems for assessing stability. It is not directly applicable to nonlinear systems because it relies on the concept of linear system frequency response, which does not exist in the same form for nonlinear systems.

Quiz 3: Control Systems

is the reference input minus the primary feedback.

With feedback _____ increases.

By which of the following the system response can be tested better ?

In a system low friction co-efficient facilitates

Spring constant in force-voltage analogy is analogous to

The frequency and time domain are related through which of the following?

An increase in gain, in most systems, leads to

specified ________ input signal.

A conditionally stable system exhibits poor stability at

The type 0 system has ______ at the origin.

The type 1 system has ______ at the origin.

The type 2 system has ______ at the origin.

The position and velocity errors of a type-2 system are

Velocity error constant of a system is measured when the input to the system is unit _______ function.

In case of type-1 system steady state acceleration is

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

Which of the following is the best method for determining the stability and transient response ?

Phase margin of a system is used to specify which of the following ?

Addition of zeros in transfer function causes which of the following ?

technique is not applicable to nonlinear system ?