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Machine Dynamics Practice Test: Automatic Control
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Avg score: 70% • Most missed: “For open control system which of the following statements is incorrect ?”
Automatic Control topics include: Automatic control and its types, open loop and closed loop transfer functions. Automatic control systems maintain process variables, such as temperature, pressure, flow, and composition, at the desired operating value.  Here are some examples of automatic control machines: Programmable logic controller (PLC): An automatic controlling system that can replace hard-wired relay logic systems for machine control. It can be used as a process control system or distribution control system for industrial automation. Industrial robots: Multipurpose manipulator... Show more
Machine Dynamics Practice Test: Automatic Control
Time left 00:00
25 Questions

1. The following has tendency to oscillate.
2. The result of the act of adjustment is called
3. It is a device to change a signal which is in one physical form to a corresponding signal in another physical form.
4. In closed loop control system, with positive value of feedback gain the overall gain of the system will
5. In an open loop control system
6. Which of the following devices are commonly used as error detectors in instruments ?
7. A control system in which the control action is somehow dependent on the output is known as
8. The device used to keep the variables at a constant desired value is called as
9. A car is running at a constant speed of 50 km/h, which of the following is the feedback element for the driver ?
10. In open loop system
11. A closed loop system is distinguished from open loop system by which of the following ?
12. For open control system which of the following statements is incorrect ?
13. _______________ is a closed loop system.
14. An automatic toaster is a __________ loop control system.
15. Any externally introduced signal affecting the controlled output is called a
16. The subsequent result of the system to the command is known as
17. The automatic control of variables is known as
18. A control system working under unknown random actions is called
19. The automatic control of the displacement or velocity or acceleration of a member of a machine is called as
20. The device which controls a process is called a
21. Which of the following statements is not necessarily correct for open control system ?
22. ______________ is a part of the human temperature control system.
23. Increasing the amplitude of the signal without affecting its waveform is known as
24. The initial response when the output is not equal to input is called
25. Which of the following should be done to make an unstable system stable ?

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