Question 1 : The output of a feedback control system must be a function of
1. Reference and output
2. Reference and input
3. Input and feedback signal
4. Output and feedback signal
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Question 2 : Consider the following statements with respect to the feedback of the control systems:
1. Feedback can improve stability or be harmful to stability if it is not properly applied.
2. Feedback can always improve stability
3. In many situations the feedback can reduce the effect of noise and disturbance on system performance.
4. In general the sensitivity of the system gain of a feedback system of a parameter variation depends on where the parameter is located.
1. 1,2 and 3 only
2. 1,3 and 4 only
3. 1,2 and 4 only
4. 1,2,3 and 4 only
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Question 3 : Feedback can cause a system that is originally stable to become___________
1. Stable
2. Unstable
3. Conditionally stable
4. Either more stable or unstable
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Question 4 : Effect of feedback on sensitivity is minimum in:
1. Open loop control system
2. Closed loop control system
3. None of the mentioned
4. Both of the mentioned
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Question 5 : Which of the following are the characteristics of regenerative feedback:
1. Zero damping
2. Stable
3. Least sensitive to parameter variations
4. None of the mentioned
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Question 6 : The mechanism of control of body temperature is non feedback system?
1. True
2. False
3.
4.
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Question 7 : On which of the following factors does the sensitivity of a closed loop system to gain changes and load disturbances depend?
1. Frequency
2. Loop gain
3. Forward gain
4. All of the mentioned
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Question 8 : Multiple signals as input can be used in which systems:
1. Feedback systems
2. Non feedback systems
3. Feedforward systems
4. None of the mentioned
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Question 9 : A control system with excessive noise, is likely to suffer from
1. Saturation in amplifying stages
2. Loss of gain
3. Vibrations
4. Oscillations
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Question 10 : Loop gain provided by the regenerative feedback makes the closed loop transfer function insensitive to G(s).
1. True
2. False
3.
4.
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