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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. |
Q41 ⇒ A proportional controller is basically an amplifier with adjustable gain [other wrong options] [Discuss in forum] an integrating amplifier an amplifier with infinite gain an amplifier with almost zero gain |
Q42 ⇒ The M circle for M = 1 is the straight line at x = - 0.5 [other wrong options] [Discuss in forum] critical point (-l, jo) circle with r = 0.33 circle with r = 0.67 |
Q43 ⇒ Consider the following statements regarding negative feedback
1 only [other wrong options] [Discuss in forum] all 1, 2 1, 3 |
Q44 ⇒ Assertion (A): In an automobile the amount of fuel admitted to the engine is adjusted as per the difference between desired and actual speed. Reason (R): The control signal is the amount of fuel to be admitted to the engine. 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 |
Q45 ⇒ Assertion (A): Derivative control action is also called rate control and has an anticipatory character. Reason (R): Derivative control amplifies noise signals. 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 |
Q46 ⇒ A reactance function has a pole or zero at origin and a pole or zero at infinity [other wrong options] [Discuss in forum] has a pole at origin has a zero at origin may have a pole or zero at origin |
Q47 ⇒ A compensator has its pole and zero as shown in the given fi lead compensator [other wrong options] [Discuss in forum] lag compensator lead-lag compensator series compensator |
Q48 ⇒ For the system of the given figure, the damping ratio of closed loop pole 0.5 [other wrong options] [Discuss in forum] 1.5 1 0.25 |
Q49 ⇒ A lag compensator provides attenuation in high frequency range [other wrong options] [Discuss in forum] very low frequency range low frequency range none of the above |
Q50 ⇒ When a unit step voltage drives a lag network the output increases exponentially from zero to final value [other wrong options] [Discuss in forum] remains constant at unit step value decreases exponentially from 1 to 0 either (b) of (c) depending on values of R and C |
Q51 ⇒ Frequency response approach is a simple approach to control system design. TRUE [other wrong options] [Discuss in forum] FALSE |
Q52 ⇒ The compensator of the given figure lead compensator [other wrong options] [Discuss in forum] lag compensator lag-lead compensator none of the above |
Q53 ⇒ For an unstable system the gain margin is indicative of how much the gain should be decreased to make the system stable. TRUE [other wrong options] [Discuss in forum] FALSE |
Q54 ⇒ In the given figure, if R = XC, voltage gai -3 dB [other wrong options] [Discuss in forum] 0 dB 3 dB 20 dB |
Q55 ⇒ Consider the following statements:
1, 2 and 3 [other wrong options] [Discuss in forum] 1 and 2 only 1 and 3 only 2 and 3 only |
Q56 ⇒ The polar plot of a transfer function passes through (-1, 0) point. The gain margin is zero [other wrong options] [Discuss in forum] - 1 dB 1 dB infinity |
Q57 ⇒ The phase angle curve of G(jω) H(jω) is drawn by adding the phase angles of individual factors. TRUE [other wrong options] [Discuss in forum] FALSE |
Q58 ⇒ The network of the given figure lead network [other wrong options] [Discuss in forum] lag network lag-lead network any of the above |
Q59 ⇒ The addition of a pole to the open loop transfer function pulls the root locus to the right [other wrong options] [Discuss in forum] to the left and making the system more stable towards right or left depending on the position of new pole none of the above |
Q60 ⇒ Given figure shows a unity feedback system. The ratio of time constants for open loop and closed loop response 0.0854166666666667 [other wrong options] [Discuss in forum] 0.0423611111111111 0.0840277777777778 0.126388888888889 |
Or |