# Multiple choice question for engineering

## Set 1

1. The effect of adding feedback makes the system__________

a) Linear

b) Non-linear

c) Time variant

d) Time invariant

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2. The relation between output response and input signal in closed loop system is :

a) Exponential

b) Parabolic

c) Linear

d) Nonlinear

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3. Assertion (A): Practical systems must be closed loop system.

Reason (R): This is due to the fact that closed loop systems are least affected by parameter variations, stable, higher bandwidth, linear and more speed of response.

a) Both A and R are true and R is the correct explanation of A.

b) Both A and R are true but R is not the correct explanation of A.

c) A is true but R is false.

d) A is false but R is true.

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4. Regenerative feedback is also called as_________________

a) Negative feedback

b) Positive feedback

c) No feedback

d) Negative and Positive Feedback

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5. Which of the following are the characteristics of regenerative feedback:

a) Zero damping

b) Stable

c) Least sensitive to parameter variations

d) None of the mentioned

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6. Which of the following are true:

a) Sensitivity of regenerative feedback is more than negative feedback but less than non-feedback system

b) Sensitivity of regenerative feedback is more non-feedback system but less than negative feedback system

c) Sensitivity of regenerative feedback is less than both

d) Sensitivity of regenerative feedback is more than both

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7. Loop gain provided by the regenerative feedback makes the closed loop transfer function insensitive to G(s).

a) True

b) False

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8. Which of the following statements is correct for any closed loop system?

a) All the co-efficient can have zero value

b) All the co-efficient are always non-zero

c) Only one of the static error co-efficient has a finite non-zero value

d) None of the mentioned

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## Set 2

1. Which of the following devices is used for conversion of co-ordinates?

a) Microsyn

b) Selsyn

c) Synchro-resolver

d) Synchro-transformer

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2. The effect of error damping is to

a) Provide larger settling lime

b) Delay the response

c) Reduce steady state error

d) All of the mentioned

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3. ______________technique gives quick transient and stability response

a) Root locus

b) Bode

c) Nyquist

d) Nichols

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4. A phase lag lead network introduces in the output

a) Lag at all frequencies

b) Lag at high frequencies and lead at low frequencies

c) Lag at low frequencies and lead at high frequencies

d) None of the above mentioned

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5. Which of the following is the non-linearity caused by servomotor?

a) Static friction

b) Backlash

c) Saturation

d) None of the mentioned

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6. ____________can be extended to systems which are time-varying?

a) Bode-Nyquist stability methods

b) Transfer functions

c) Root locus design

d) State model representatives

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7. Laplace transform is used for the systems with:

a) Initial conditions infinite

b) Initial conditions zero

c) Initial conditions finite

d) Initial conditions equal to the initial input

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8. Which of the following is an electromechanical device?

a) Induction relay

b) Thermocouple

c) LVDT

d) All of the mentioned

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9. A differentiator is usually not a part of a control system because it

a) Reduces damping

b) Reduces the gain margin

c) Increases input noise

d) Increases error

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10. If the gain of the critical damped system is increased it will behave as

a) Oscillatory

b) Critically damped

c) Overdamped

d) Underdamped

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## Set 3

1. The techniques of linear system can be used in the non-linear system entirely:

a) True

b) False

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2. The disadvantages of the linear system are:

a) The constraints on the linear operation over wide range demands unnecessarily high quality.

b) The restriction to the linear theory may inhibit the designer’s curiosity to deliberately introduce the non-linear components.

c) Practically systems are non-linear

d) All of the mentioned

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3. System non-linearities are taken account by:

a) Analytical

b) Graphical and numerical techniques

c) Both a and b

d) None of the mentioned

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4. The superposition theorem is :

a) Homogeneity

b) Additivity

c) Combination of homogeneity and additivity

d) Applied to non-linear systems

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5. The standard test signal can be applied to give output to:

a) Linear systems

b) Non-linear systems

c) Time variant systems

d) Time invariant systems

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6. The amplitude of the standard test signal does not matter in linear systems:

a) True

b) False

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7. The non-linear systems:

a) Do not obey superposition theorem

b) May be highly sensitive to the input amplitude

c) Laplace and z transform are not applicable to the non-linear systems

d) All of the mentioned

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8. The stability of the linear system:

a) Determined by the location of the poles

b) Dependent entirely of whether or the system is driven

c) The stability of the undriven linear system is dependent on the magnitude of the final initial state.

d) Stability cannot be determined by the open loop poles

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9. In non-linear system stability is :

a) Dependent on the input

b) Independent on initial state

c) Independent on input

d) Dependent on input and initial state.

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10. Non-linear elements may exhibit___________

a) Linear systems

b) Non-linear systems

c) Limit cycles

d) Time invariant systems

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11. The necessary condition of stability are:

a) Coefficient of characteristic equation must be real and have the same sign

b) Coefficient of characteristic equation must be non-zero

c) Both of the mentioned

d) Coefficient of characteristic equation must be zero

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12. None of the coefficients can be zero or negative unless one of the following occurs:

a) One or more roots have positive real parts

b) A root at origin

c) Presence of root at the imaginary axis

d) All of the mentioned

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13. The __________ of the coefficients of characteristic equation is necessary as well as sufficient condition for the stability of system of first and second order.

a) Negativeness

b) Positiveness

c) Positiveness and Negativeness

d) None of the mentioned

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14. The Positiveness of the coefficients of characteristic equation is necessary as well as sufficient condition for:

a) First order system

b) Second order system

c) Third order system

d) None of the mentioned

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15. Assertion (A): Routh criterion is in terms of array formulation, which is more convenient to handle.

Reason (R): This method is used to investigate the method of stability of higher order systems.

a) Both A and R are true and R is correct explanation of A

b) Both A and R are true and R is not correct explanation of A

c) A is true but R is false

d) A is False but R is true

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## Set 4

1. An essential ingredient for effective multimedia presentations incorporates user participation or __________

a) Links

b) Buttons

c) Interactivity

d) Integration

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2. The term that describes a user’s participation with a multimedia presentation is __________

a) Hyperactivity

b) Interactivity

c) Inactivity

d) Reactivity

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3. Multimedia can contain

a) Graphics, animation, video, music, and voice

b) Only numeric type data

c) Numeric, text, and picture data

d) Databases that turn contain other databases creative massive data collection

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4. Primary uses of business interactive multimedia include all of the following except

a) Product demonstrations

b) Web page development

c) Entertainment

d) High-quality presentations

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5. The connection between a multimedia presentation and a file containing a song to be played is called a(n) _________

a) Link

b) Chain

c) Pointer

d) Tie

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6. Clicking on special areas called __________ activates the various features of a multimedia presentation.

a) Activators

b) Starters

c) Pages

d) Buttons

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7. When determining the overall objective of the project, the resources required and the persons or team who will work on the project, you are in the __________ step of developing a multimedia presentation.

a) Planning

b) Designing

c) Creating

d) Supporting

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8. The creation of a storyboard is essential to the development of the project. This is the __________ step of development.

a) Planning

b) Designing

c) Creating

d) Supporting

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9. Errors are identified and the presentation is evaluated in terms of effectiveness in the __________ step.

a) Planning

b) Designing

c) Creating

d) Supporting

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10. Before building a presentation with a multimedia authoring system, the designer would use a _________

a) Flowchart

b) Hypermedia database

c) Button file

d) Storyboard

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## Set 5

1. Which principle specifies the relationship between enclosure of poles & zeros by s-plane contour and the encirclement of origin by q(s) plane contour?

a) Argument

b) Agreement

c) Assessment

d) Assortment

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2. If a Nyquist plot of G (jω) H (jω) for a closed loop system passes through (-2, j0) point in GH plane, what would be the value of gain margin of the system in dB?

a) 0 dB

b) 2.0201 dB

c) 4 dB

d) 6.0205 dB

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3. For Nyquist contour, the size of radius is _______

a) 25

b) 0

c) 1

d) ∞

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4. Consider a feedback system with gain margin of about 30. At what point does Nyquist plot crosses negative real axis?

a) -3

b) -0.3

c) -30

d) -0.03

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5. According to Nyquist stability criterion, where should be the position of all zeros of q(s) corresponding to s-plane?

a) On left half

b) At the center

c) On right half

d) Random

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6. If the system is represented by G(s) H(s) = k (s+7) / s (s +3) (s + 2), what would be its magnitude at ω = ∞?

a) 0

b) ∞

c) 7/10

d) 21

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7. Consider the system represented by the equation given below. What would be the total phase value at ω = 0?

200/[s3 (s + 3) (s + 6) (s + 10)].

a) -90°

b) -180°

c) -270°

d) -360°

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8. Due to an addition of pole at origin, the polar plot gets shifted by ___ at ω = 0 ?

a) -45°

b) -60°

c) -90°

d) -180°

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9. In polar plots, if a pole is added at the origin, what would be the value of the magnitude at Ω = 0?

a) Zero

b) Infinity

c) Unity

d) Unpredictable

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10. In polar plots, what does each and every point represent w.r.t magnitude and angle?

a) Scalar

b) Vector

c) Phasor

d) Differentiator