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Control Systems - Interview Questions and Answers

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31. In an automatic control system which of the following elements is not used ?
A. Error detector
B. Final control element
C. Sensor
D. Oscillator
Explanation:
32. The capacitance, in force-current analogy, is analogous to
A. momentum
B. velocity
C. displacement
D. mass
Explanation:
33. In thermal-electrical analogy charge is considered analogous to
A. heat flow
B. reciprocal of heat flow
C. reciprocal of temperature
D. temperature
Explanation:
34. For open control system which of the following statements is incorrect ?
A. Less expensive
B. Recalibration is not required for maintaining the required quality of the output
C. Construction is simple and maintenance easy
D. Errors are caused by disturbances
Explanation:
35. The second derivative input signals modify which of the following ?
A. The time constant of the system
B. Damping of the system
C. The gain of the system
D. The time constant and suppress the oscillations
Explanation:
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