Control Systems MCQs
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Control Systems MCQs
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25 Questions

1. Which time is responsible for introducing an error in the temperature regulation of applications associated with ON-OFF controllers?
2. Due to an addition of pole at origin, the polar plot gets shifted by ___ at ω = 0?
3. In a signal flow graph method, how is an overall transfer function of a system obtained?
4. If an impulse response of a system is e-5t, what would be its transfer function?
5. Which among the following is a unique model of a system?
6. On which factor does the steady state error of the system depend?
7. Which terminology deals with the excitation or stimulus applied to the system from an external source for the generation of an output?
8. Basically, poles of transfer function are the laplace transform variable values which causes the transfer function to become ___________
9. If the system is represented by G(s) H(s) = k (s+7) / s (s +3) (s + 2), what would be its magnitude at ω = ∞?
10. In an octave frequency band, the ratio of f2 / f1 is equivalent to ________
11. Which system exhibits the initiation of corrective action only after the output gets affected?
12. If the system is specified by open loop transfer function G(s)H(s) = k / s(s+3) (s + 2), how many root loci proceed to end at infinity?
13. If an error signal e(t) of an ON-OFF controller is found to be greater than zero, what would be its output?
14. Consider a feedback system with gain margin of about 30. At what point does Nyquist plot crosses negative real axis?
15. Which among the following is/are an/the illustration/s of a sinusoidal input?
16. If a signal is passed through an integrator, it _____the amplitude of noise signal.
17. In signal flow graph, the product of all ______gains while going through a forward path is known as ‘Path gain’.
18. In P-I controller, what does an integral of a function compute?
19. At which condition of ‘ξ’, resonant peak does not exist and its maximum value is considered to be unity along with zero resonant frequency?
20. In a signal flow graph, nodes are represented by small _____
21. Which is the correct sequence of operational steps necessary for proper operation of an elevator (lift) control mechanism? 1. Up switch 2. Stop switch 3. Down switch 4. Start switch
22. In frequency response, the resonance frequency is basically a measure of _______ of response.
23. The value of variables at each node is _________the algebraic sum of all signals arriving at that node.
24. According to the property of state transition method, e0 is equal to _____
25. How many digital inputs are present in PLCs?

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