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Home⇒ Engineering⇒
Automatic control systems
1-Dont try to cram or spend more time here just read it fast and cover syllabus then practice MCQ's cheptor of same topic to check your progress. . |
2-Wrong options are also given but dont concentrate there, Right answer is in bold format. |
Q21 ⇒ An open loop system has a forward path transfer function (42.25)/s(s + 6.5). The unit step response of the system starting from rest will have its maximum value at a time equal to infinity [other wrong options] [Discuss in forum] 0 sec 0.56 sec 5.6 sec |
Q22 ⇒ The pole zero plot of the given figure is minimum phase function [other wrong options] [Discuss in forum] non-minimum phase function all pass function none of the above |
Q23 ⇒ In the given figure the input frequency f = 0.1 (1/2 p 0 dB [other wrong options] [Discuss in forum] 3 dB -3 dB 20 dB |
Q24 ⇒ In the signal flow graph of the given figure, the number of forward path 2 [other wrong options] [Discuss in forum] 1 3 4 |
Q25 ⇒ When time constant T in any factor is varied, the shapes of log magnitude and phase angle curves remain the same. TRUE [other wrong options] [Discuss in forum] FALSE |
Q26 ⇒ In root locus analysis the breakaway and break in points either lie on the real axis or occur in complex conjugate pairs [other wrong options] [Discuss in forum] lie on the real axis always occur in complex conjugate pairs none of the above |
Q27 ⇒ The number of branches of root locus plot is equal to the number of roots of characteristic equation [other wrong options] [Discuss in forum] double the number of roots of characteristic equation the number of roots of characteristic equation minus one the number of roots of characteristic equation plus one |
Q28 ⇒ Temperature is analogous to voltage [other wrong options] [Discuss in forum] flux charge none of the above |
Q29 ⇒ The gain margin of first and second order systems is infinite. TRUE [other wrong options] [Discuss in forum] FALSE |
Q30 ⇒ Polar plot of a lag-lead compensator is a circle. TRUE [other wrong options] [Discuss in forum] FALSE |
Q31 ⇒ The system in the given figur type 3 system [other wrong options] [Discuss in forum] type 0 system type 1 system type 2 system |
Q32 ⇒ Which of the following is used to obtain output position in a position control system? Load cell [other wrong options] [Discuss in forum] Strain gauge Synchro Thermistor |
Q33 ⇒ The correct sequence of events to improve system stability is use negative feedback, reduce gain, insert derivative action [other wrong options] [Discuss in forum] insert derivative action, use negative feedback, reduce gain reduce gain, use negative feedback, insert derivative action reduce gain, insert derivative feedback, use negative feed back |
Q34 ⇒ Assertion (A): Points in the s plane at which function G(s) is not analytic are called singular, points. Reason (R): Singular points at which the function G(s) or its derivative approach infinity are called poles. Both A and R are correct but R is not correct explanation of A [other wrong options] [Discuss in forum] Both A and R are correct and R is correct explanation of A A is correct but R is wrong R is correct but A is wrong |
Q35 ⇒ For a second order system ωn is natural frequency, ωd is frequency of damped oscillations and ζ is damping factor. Then ωd = ωn (1 - ξ2)0.5 [other wrong options] [Discuss in forum] ωd = ωn ξ ωd = ωn (1 - ξ)2 ωd = ωn (1 - ξ)0.5 |
Q36 ⇒ In force current analogy, displacement x is analogous to magnetic flux linkage [other wrong options] [Discuss in forum] charge electrostatic energy voltage |
Q37 ⇒ Assertion (A): If integral control action is included in the controller the offset can be eliminated. Reason (R): Integral control action may lead to oscillatory response. Both A and R are correct but R is not correct explanation of A [other wrong options] [Discuss in forum] Both A and R are correct and R is correct explanation of A A is correct but R is wrong R is correct but A is wrong |
Q38 ⇒ For type 0 system the starting point (i.e. ω = 0) of polar plot is finite and is on positive real axis. TRUE [other wrong options] [Discuss in forum] FALSE |
Q39 ⇒ In case of synchro error detector the electrical zero position of control transformer is obtained when angular displacement between rotors is 90° [other wrong options] [Discuss in forum] zero 45° 180° |
Q40 ⇒ Assertion (A): When performance specifications are given in term of transient response characteristics, root locus method is a suitable method. Reason (R): When performance specifications in terms of state variables are given, modern control methods can be used. Both A and R are correct but R is not correct explanation of A [other wrong options] [Discuss in forum] Both A and R are correct and R is correct explanation of A A is correct but R is wrong R is correct but A is wrong |
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