### questions

Title
###### For non-linear systems stability cannot be determined due to:

For non-linear systems stability cannot be determined due to:

1. possible existence of multiple equilibrium states
2. no correspondence between bounded input and bounded output stability and asymptotic stability
3. output may be bounded for the particular bounded input but may not be bounded for the bounded inputs
4. all of the mentioned
###### If the impulse response in absolutely integrable then the system is :

If the impulse response in absolutely integrable then the system is :

1. absolutely stable
2. unstable
3. linear
4. stable
###### The roots of the transfer function do not have any effect on the stability of the system

The roots of the transfer function do not have any effect on the stability of the system.

1. true
2. false
###### control systems have unpredictable & non-repeatable

control systems have unpredictable & non-repeatable.

1. static
2. dynamic
3. deterministic
4. stochastic
###### The pressure inside the furnace is measured by

The pressure inside the furnace is measured by

1. gauge
2. thermometer
3. manometer
4. barometer
###### On what difference does the pneumatic system works?

On what difference does the pneumatic system works?

1. speed
2. pressure
3. area
4. length
###### In a thermal system, the temperature of the medium is

In a thermal system, the temperature of the medium is

1. increasing
2. decreasing
3. zero
4. uniform
###### How many parameters does process control refer to?

How many parameters does process control refer to?

1. 1
2. 3
3. 5
4. 7
###### What is the effect of feedback in the overall gain of the system?

What is the effect of feedback in the overall gain of the system?

1. increases
2. decreases
3. zero
4. no change
###### In a temperature control system, what conversion in signal takes place?

In a temperature control system, what conversion in signal takes place?

1. digital to analog
2. analog to digital
3. error to digital
4. error to analog
###### Which of the following are the not characteristics of the closed loop systems?

Which of the following are the not characteristics of the closed loop systems?

1. it does not compensate for disturbance
2. it reduces the sensitivity of plant-parameter variations
3. it does not involve output measurements
4. it does not has the ability to control the system transient response
###### Which one of the following effect in the system is not caused by negative feedback?

Which one of the following effect in the system is not caused by negative feedback?

1. reduction in gain
2. increased in bandwidth
3. increase in distortion
4. reduction in output impedance
###### Which of the statement is correct with regard to the bandwidth of the control loop system:

Which of the statement is correct with regard to the bandwidth of the control loop system:

1. in systems where the low frequency magnitude in 0 db on the bode diagram, the bandwidth is measured at the -3 db frequency
2. the bandwidth is the measurement of the accuracy of the closed loop system
3. the stability is proportional to the bandwidth
4. the system with larger bandwidth provides slower step response and lower fidelity ramp response
###### Which of the statements are the advantages of closed loop systems over the open loop system:

Which of the statements are the advantages of closed loop systems over the open loop system:

1. the overall reliability of the open loop system is more than the closed loop system is more than closed loop system.
2. the transient response in closed loop system decays more quickly than in open loop system.
3. in open loop system closing the loop increases the gain of the system
4. in open loop system the effect of parameter variation is reduced
###### In control system excessive bandwidth is not employed because

In control system excessive bandwidth is not employed because

1. noise is proportional to bandwidth
2. it leads to low relative stability
3. it leads to slower time response
4. noise is proportional to the square of the bandwidth
###### Feedback control system is basically

Feedback control system is basically

1. high pass filter
2. low pass filter
3. band pass filter
4. band stop filter
###### Which of the following will not decrease as a result of introduction of negative feedback?

Which of the following will not decrease as a result of introduction of negative feedback?

1. instability
2. bandwidth
3. overall gain
4. distortion
###### As compared to the closed loop system, an open loop system is

As compared to the closed loop system, an open loop system is

1. more stable but less accurate
2. less stable as well as less accurate
3. more stable as well as more accurate
4. less stable but more accurate
###### Insertion of negative feedback in control system affects:

Insertion of negative feedback in control system affects:

1. the transient response to vanish uniformly
2. the transient response to decay very fast
3. no change in transient response
4. the transient response decays at slow rate
###### Open loop system is stable than closed loop system

Open loop system is                        stable than closed loop system

1. more
2. less
3. inclined
4. exponential

MCQs

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