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Electrical Engineering Objective Questions { Control System }

43.  Lead?lag compensation is needed for
A. transient response improvement
B. steady state response improvement
C. both transient and steady state response improvement
D. none of these

44.  Which of the following can not be treated as an amplifier in control system?
A. DC generator
B. DC motor
C. Amplidyne
D. Metadyne

45.  The selsyn servosystem provides a
A. mechanical gearing between two shafts
B. electrical gearing between two shafts
C. overvoltage protection
D. both A and B above

46.  In pneumatic control system, the electrical rtsistance is analogous to
A. volume of air
B. restriction of flow
C. filled helium tube
D. none of these

47.  In pneumatic control system, compensation is provided by
A. bimetal strip
B. extension tube
C. restriction-volume combination
D. none of these

48.  Which of the following is electromagnetic transducer is used to convert an angular position of a shaft into an electrical signal?
A. Rotary LVDT
B. synclvos
C. AC servomotor
D. none of these

49.  In a PID controller, the offset has increased. In order to reduce it, the integral time constant should be
A. decreased
B. increased
C. made zero
D. made infinity

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