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Instrument Mechanic Practice Test: Control System
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Instrument Mechanic Practice Test: Control System
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25 Questions

1. A conditionally stable system exhibits poor stability at
2. ___________ has tendency to oscillate.
3. _____________ has tendency to oscillate.
4. On which of the following factors does the sensitivity of a closed loop system to gain changes and load disturbances depend?
5. As a result of introduction of negative feedback which of the following will not decrease?
6. With feedback ____________ reduces .
7. Automatic control system in which output is a variable is called
8. Transient response in the system is basically due to
9. Reset control action in often expressed in unit of
10. Which controller has the potential to eliminate/overcome the drawback of offset in proportional controllers?
11. A Controller ,essentially is a
12. A control system in which the control action is somehow dependent on the output is known as
13. Routh stability method uses
14. The output signal is feedback at the input side from the ___________ point.
15. A closed loop system is distinguished from open loop system by which of the following?
16. Process degrees of freedom
17. Which of the following is a three mode control action?
18. P-I controller as compared to P-controller has a
19. _________ is a closed loop system.
20. Transfer function of a system is used to calculate which of the following?
21. Cascade control means
22. Integral control action output equal to output of proportional control action is
23. A control system with excessive noise , is likely to suffer from
24. A good control system has all the following features except
25. A control system working under unknown random action is called

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