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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