Question 1 : Which of the following is not the correct reason to select feedback compensation over cascaded one?
1. No amplification is required as the energy transfer is from higher to lower level.
2. Suitable devices are not available for compensation(series)
3. It is economical
4. Provides greater stiffness against load disturbances
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Question 2 : Feedback control system is basically
1. High pass filter
2. Low pass filter
3. Band pass filter
4. Band stop filter
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Question 3 : Primary purpose of using Feedback is :
1. To reduce the sensitivity of the system to parameter variations.
2. To increase the bandwidth of the system
3. To reduce the noise and distortion of the system
4. To increase stability of the system
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Question 4 : Operations performed by pneumatic controllers:
1. Flexible operations
2. High torque high speed operations
3. Fire and explosion proof operation
4. All of the mentioned
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Question 5 : Which among the following is not an advantage of an open loop system?
1. Simplicity in construction & design
2. Easy maintenance
3. Rare problems of stability
4. Requirements of system re-calibration from time to time
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Question 6 : Negative exponential term in the equation of the transfer function causes the transportation lag.
1. True
2. False
3.
4.
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Question 7 : Lead compensator increases bandwidth
1. True
2. False
3.
4.
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Question 8 : Open loop system is ___________ stable than closed loop system
1. More
2. Less
3. Inclined
4. Exponential
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Question 9 : Consider the following statements:
1. Integral controller improves steady state response
2. By use of proportional controller, maximum peak overshoot decreases
3. Type and order of system reduces by one for derivative controller
4. Integral controller makes the system less stable in transient state due to oscillations
Select the correct answer using the codes given below:
1. 1,3 and 4
2. 1,2 and 3
3. 2.3 and 4
4. 1,2 and 4
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Question 10 : Phase lag controller:
1. Improvement in transient response
2. Reduction in steady state error
3. Reduction is settling time
4. Increase in damping constant
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