Practice Test: Question Set - 08
1. A closed loop system is distinguished from open loop system by which of the following?
- (A) Servomechanism
- (B) Feedback
- (C) Output pattern
- (D) Input pattern
2. The band width, in a feedback amplifier.
- (A) Remains unaffected
- (B) Decreases by the same amount as the gain
increase
- (C) Increases by the same amount as the gain
decrease
- (D) Decreases by the same amount as the gain
decrease
3. In liquid level and electrical system analogy, voltage is considered analogous to
- (A) Head
- (B) Liquid flow
- (C) Liquid flow rate
- (D) None of the above
4. _______ is the reference input minus the primary feedback.
- (A) Manipulated variable
- (B) Zero sequence
- (C) Actuating signal
- (D) Primary feedback
5. If a step function is applied to the input of a system and the output remains below a certain level for all the time, the system is
- (A) Not necessarily stable
- (B) Stable
- (C) Unstable
- (D) Always unstable
6. The effect of error damping is to
- (A) Provide larger settling lime
- (B) Delay the response
- (C) Reduce steady state error
- (D) Any of the above
7. Which of the following can be measured by LVDT?
- (A) Displacement
- (B) Velocity
- (C) Acceleration
- (D) Any of the above
8. Any externally introduced signal affecting the controlled output is called a
- (A) Feedback
- (B) Stimulus
- (C) Signal
- (D) Gain control
9. Transfer function of a system is used to calculate which of the following?
- (A) The order of the system
- (B) The time constant
- (C) The output for any given input
- (D) The steady state gain
10. Has tendency to oscillate.
- (A) Open loop system
- (B) Closed loop system
- (C) Both (A) and (B)
- (D) Neither (A) nor (B)
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