Question 41 : PI 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 42 : 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
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Question 43 : 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
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Question 44 : The compensator transfer function can be placed in:
1. Cascade or series compensation
2. Feedback or parallel compensation
3. Positive
4. Negative
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Question 45 : A proportional controller leads to:
1. Zero steady state error for step input for type 1 system
2. Zero steady state error for step input for type 0 system
3. Infinite steady state error for step input for a type 1 system
4. Finite steady state error for step input for type 1 system
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Question 46 : PD controller is used to compensate a system, Compared to the uncompensated system, the compensated system has:
1. A higher type number
2. Reduced damping
3. Higher noise amplification
4. Large transient overshoot
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Question 47 : 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
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Question 48 : A phase lead compensation leads to:
1. Increase in overshoot
2. Reduction in bandwidth of closed loop system
3. Reduction in rise time of closed loop system
4. Reduction in gain margin
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Question 49 : A composite R-C network yielded the following transfer function when calculated from its components:
T(s) = 1+21s+20s²/1+11s+10s². This network can be used as which one of the following?
1. Phase lead compensator
2. Phase lag compensator
3. Lag lead compensator
4. None of the mentioned
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Question 50 : Which among the following controls the speed of D.C. motor?
1. Galvanometer
2. Gauss meter
3. Potentiometer
4. Tachometer
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