Question 61 : In frequency domain the measure of relative stability is:
1. Resonant peak
2. Phase margin
3. Resonant peak and phase margin
4. Maximum peak overshoot
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Question 62 : The compensator G(s) =5(1+0.3s)/1+0.1s would provide a maximum phase shift of:
1. 20°
2. 30°
3. 45°
4. 60°
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Question 63 : Lag compensator reduces__________
1. Position constant
2. Velocity constant
3. Position variable
4. Acceleration constant
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Question 64 : PD controller:
1. Decreases steady state error and improves stability
2. Rise time decreases
3. Transient response becomes poorer
4. Increases steady state error
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Question 65 : 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
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Question 66 : The open loop transfer function of a plant is given as, G(s) =1/s^2-1. If the plant is operated in unity feedback configuration, then the lead compensator that can stabilize the control system is:
1. 10(s-1)/(s+2)
2. 10(s+4)/(s+2)
3. 10(s+2)/(s+10)
4. 10(s+2)/(s+10)
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Question 67 : Rate compensation :
1. Increases bandwidth
2. Attenuation
3. Increases damping factor
4. Second order
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Question 68 : The transfer function of a lead controller is 1+20s/1+5s. The high frequency magnitude of the lead controller to dB is ___________
1. 1
2. 2
3. 3
4. 4
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Question 69 : With regard to the filtering capacity the lead compensator and lag compensator are respectively:
1. Low pass and high pass filter
2. High pass and low pass filter
3. Both high pass filter
4. Both low pass filters
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Question 70 : An all-pass network imparts only
1. Negative phase to the input
2. Positive phase to the input
3. 90 degree phase shift to the input
4. 180 degree phase shift to the input
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