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.Management Sciences
Category: Control Systems
Which of the following devices are commonly used as error detectors in instruments ?
A. Vernistats
B. Microsyns
C. Resolvers
D. Any of the above
_____________is not a final control element?
A. Control valve
B. Potentiometer
C. Electropneumatic converter
D. Servomotor
increases the steady state accuracy?
A. Integrator
B. Differentiator
C. Phase lead compensator
D. Phase lag compensator
Static error coefficients are used as a measure of the effectiveness of closed loop systems for specified ___________ input signal?
A. acceleration
B. velocity
C. position
D. all of the above
The transfer function technique is considered as inadequate under which of the following conditions ?
A. Systems having complexities and non-linearities
B. Systems having stability problems
C. Systems having multiple input disturbances
D. All of the above
Phase margin of a system is used to specify which of the following ?
A. Frequency response
B. Absolute stability
C. Relative stability
D. Time response
A.C. servomotor resembles_____________?
A. two phase induction motor
B. Three phase induction motor
C. direct current series motor
D. universal motor
A conditionally stable system exhibits poor stability at______________?
A. low frequencies
B. reduced values of open loop gain
C. increased values of open loop gain
D. none of the above
A control system with excessive noise, is likely to suffer from_______________?
A. saturation in amplifying stages
B. loss of gain
C. vibrations
D. oscillations
In a control system integral error compensation _________________ steady state error?
A. increases
B. minimizes
C. does not have any effect on
D. any of the above
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