Electrical control systems

31. In an automatic control system which of the following elements is not used ?

Error detector
Final control element
Sensor
Oscillator

Detailed SolutionIn an automatic control system which of the following elements is not used ?

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32. A differentiator is usually not a part of a control system because it

reduces damping
reduces the gain margin
increases input noise
increases error

Detailed SolutionA differentiator is usually not a part of a control system because it

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33. A conditionally stable system exhibits poor stability at

low frequencies
reduced values of open loop gain
increased values of open loop gain
none of the above

Detailed SolutionA conditionally stable system exhibits poor stability at

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34. The frequency and time domain are related through which of the following?

Laplace Transform and Fourier Integral
Laplace Transform
Fourier Integral
Either (B) or (C)

Detailed SolutionThe frequency and time domain are related through which of the following?

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35. Is a part of the human temperature control system.

Digestive system
Perspiration system
Ear
Leg movement

Detailed SolutionIs a part of the human temperature control system.

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36. A controller, essentially, is a

sensor
clipper
comparator
amplifier

Detailed SolutionA controller, essentially, is a

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37. Spring constant in force-voltage analogy is analogous to

capacitance
reciprocal of capacitance
current
resistance

Detailed SolutionSpring constant in force-voltage analogy is analogous to

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38. technique is not applicable to nonlinear system ?

Nyquist Criterion
Quasi linearization
Functional analysis
Phase-plane representation

Detailed Solutiontechnique is not applicable to nonlinear system ?

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39. The second derivative input signals modify which of the following ?

The time constant of the system
Damping of the system
The gain of the system
The time constant and suppress the oscillations E. None of the above

Detailed SolutionThe second derivative input signals modify which of the following ?

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40. Which of the following is the input to a controller ?

Servo signal
Desired variable value
Error signal
Sensed signal

Detailed SolutionWhich of the following is the input to a controller ?

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