Electrical Control System MCQ with Answers - ObjectiveBooks

Electrical Control System MCQ with Answers

Practice Test: Question Set - 10


1. Which of the following devices are commonly used as error detectors in instruments?
    (A) Vernistats
    (B) Microsyns
    (C) Resolvers
    (D) Any of the above

2. A control system with excessive noise, is likely to suffer from
    (A) Saturation in amplifying stages
    (B) Loss of gain
    (C) Vibrations
    (D) Oscillations

3. On which of the following factors does the sensitivity of a closed loop system to gain changes and load disturbances depend?
    (A) Frequency
    (B) Loop gain
    (C) Forward gain
    (D) All of the above

4. In an automatic control system which of the following elements is not used?
    (A) Error detector
    (B) Final control element
    (C) Sensor
    (D) Oscillator

5. The viscous friction coefficient, in force-voltage analogy, is analogous to
    (A) Charge
    (B) Resistance
    (C) Reciprocal of inductance
    (D) Reciprocal of conductance

6. From which of the following transfer function can be obtained?
    (A) Signal flow graph
    (B) Analogous table
    (C) Output-input ratio
    (D) Standard block system

7. 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

8. In order to increase the damping of a badly under-damped system which of following compensators may be used?
    (A) Phase-lead
    (B) Phase-lag
    (C) Both (A) and (B)
    (D) Either (A) and (B)

9. ________ can be extended to systems which are time-varying?
    (A) Bode-Nyquist stability methods
    (B) Transfer functions
    (C) Root locus design
    (D) State model representatives

10. Which of the following is the output of a thermocouple?
    (A) Alternating current
    (B) Direct current
    (C) A.C. voltage
    (D) D.C. voltage

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