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 Total number of questions : 20.
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1.  For the system in the given figure. The transfer function C(s)/R(s) is 

Your Answer: Option (Not Answered) Correct Answer: Option C Explanation: Transfer function = (G_{1} + 1) G_{2} + 1 = G_{1} G_{2} + G_{2} + 1. Learn more problems on : Automatic Control Systems Discuss about this problem : Discuss in Forum 
2.  First column elements of Routh's tabulation are 3, 5, , 2. It means that there 

Your Answer: Option (Not Answered) Correct Answer: Option C Explanation: Since there are two sign changes in the first column, hence two roots in right half plane. Learn more problems on : Automatic Control Systems Discuss about this problem : Discuss in Forum 
3.  In the given figure the input is x(t) = A sin ωt. The steady state output y(t) = 

Your Answer: Option (Not Answered) Correct Answer: Option B Explanation: The magnitudes A and G(jω) are multiplied and phase angles are added. Learn more problems on : Automatic Control Systems Discuss about this problem : Discuss in Forum 
4.  For the given figure, 

Your Answer: Option (Not Answered) Correct Answer: Option B Explanation: For the inner loop, transfer function = Then . Learn more problems on : Automatic Control Systems Discuss about this problem : Discuss in Forum 
5.  The maximum shift which can be provided by a lead compensator with transfer function is 

Your Answer: Option (Not Answered) Correct Answer: Option B Explanation: The maximum phase lead is given by In this case a = 1/3. Hence sin Φ_{m} = = 0.5 or Φ_{m} = 30°. Learn more problems on : Automatic Control Systems Discuss about this problem : Discuss in Forum 
6.  The polar plot of 

Your Answer: Option (Not Answered) Correct Answer: Option A Explanation: It does not become real at any frequency. Learn more problems on : Automatic Control Systems Discuss about this problem : Discuss in Forum 
7.  A lead compensator is basically a 

Your Answer: Option (Not Answered) Correct Answer: Option A Explanation: See transfer function in the equation . Learn more problems on : Automatic Control Systems Discuss about this problem : Discuss in Forum 
8.  For the system of the given figure, the break away and break in points are determined from the conditions . Then K = 

Your Answer: Option (Not Answered) Correct Answer: Option B Learn more problems on : Automatic Control Systems Discuss about this problem : Discuss in Forum 
9.  Assertion (A): For a given system only one of the static error constants is finite and significant. Reason (R): If finite static error constant is large, the loop gain becomes smaller as ω approaches zero. 

Your Answer: Option (Not Answered) Correct Answer: Option C Learn more problems on : Automatic Control Systems Discuss about this problem : Discuss in Forum 
10.  If ΔP is pressure difference, A is area of each flat surface, K is stiffness and Δx is displacement of movable surface from reference of bellows, then 

Your Answer: Option (Not Answered) Correct Answer: Option C Learn more problems on : Automatic Control Systems Discuss about this problem : Discuss in Forum 
11.  In a mechanical accelerometer, the steady state displacement is a measure of 

Your Answer: Option (Not Answered) Correct Answer: Option A Learn more problems on : Automatic Control Systems Discuss about this problem : Discuss in Forum 
12.  In a synchro transmitter 

Your Answer: Option (Not Answered) Correct Answer: Option A Learn more problems on : Automatic Control Systems Discuss about this problem : Discuss in Forum 
13.  If block diagrams of the given figure (a) and (b) are to be equivalent, then 

Your Answer: Option (Not Answered) Correct Answer: Option A Learn more problems on : Automatic Control Systems Discuss about this problem : Discuss in Forum 
14.  In control systems the word controller includes 

Your Answer: Option (Not Answered) Correct Answer: Option C Learn more problems on : Automatic Control Systems Discuss about this problem : Discuss in Forum 
15.  If damping ratio is 0.5, the lines joining complex poles with origin are inclined to negative real axis at 

Your Answer: Option (Not Answered) Correct Answer: Option B Learn more problems on : Automatic Control Systems Discuss about this problem : Discuss in Forum 
16.  Assertion (A): If points at infinity are included, G(s) has same number of poles and zeros. Reason (R): The function has a zero at s =  2. 

Your Answer: Option (Not Answered) Correct Answer: Option B Learn more problems on : Automatic Control Systems Discuss about this problem : Discuss in Forum 
17.  Integral control action 

Your Answer: Option (Not Answered) Correct Answer: Option C Learn more problems on : Automatic Control Systems Discuss about this problem : Discuss in Forum 
18.  Nyquist stability criterion uses open loop frequency response characteristics. 

Your Answer: Option (Not Answered) Correct Answer: Option A Learn more problems on : Automatic Control Systems Discuss about this problem : Discuss in Forum 
19.  Which of the following can act as error detecting devices


Your Answer: Option (Not Answered) Correct Answer: Option A Learn more problems on : Automatic Control Systems Discuss about this problem : Discuss in Forum 
20.  A conditionally stable system is stable for the value of gain between two critical values. It is unstable if 

Your Answer: Option (Not Answered) Correct Answer: Option C Learn more problems on : Automatic Control Systems Discuss about this problem : Discuss in Forum 