Q1. If one of the poles lies in the left half s plane, the system is
(A) stable
(B) unstable
(C) marginary stable
(D) Cannot say

Q2. If one of the poles lies in the right half s plane, the system is
(A) stable
(B) unstable
(C) marginary stable
(D) None of these

Q3. In an open loop control system
(A) Output is independent of control input
(B) Output is dependent on control input
(C) Only system parameters have effect on the control output
(D) none of these

Q4. TF of a system is used to calculate
(B) time constant
(C) order of system
(D) output for given input

Q5. For a stabile system, poles must lie in
(A) right half of s-plane
(B) left half of s- plane
(C) on imaginary axis
(D) None of these

Q6. nyquist plot of all pass filter is
(A) parabola
(B) circle
(C) square
(D) not define

Q7. which system is more accurate
(A) open loop
(B) closed loop
(C) both
(D) None of these

Q8. which one is more stable
(A) open loop system
(B) close loop system
(C) both
(D) None of these

Q9. for stable system
(A) pm and GM both are negative
(B) PM and GM both are positive
(C) PM is positive and GM is negative
(D) PM is negative and GM is positive

Q10. if Gain cross over frequency(Wgc) < phase cross over frequency(Wpc) then system is
(A) stable
(B) unstable
(C) marginary stable
(D) None of these

Q11. if Gain cross over frequency(Wgc) =phase cross over frequency(Wpc) then system is
(A) stable
(B) unstable
(C) marginary stable
(D) None of these

Q12. if Gain cross over frequency(Wgc) > phase cross over frequency(Wpc) then system is
(A) stable
(B) unstable
(C) both a and b
(D) None of these

Q13. if damping ratio is greater then one then system is
(A) underdamped
(B) undamped
(C) overdamped
(D) critically damped

Q14. if damping ratio is one then system is
(A) undamped
(B) underdamped
(C) critically damped
(D) over damped

Q15. damping ratio is between 0 and 1 then system is
(A) undamped
(B) underdamped
(C) critical damped
(D) over damped

Q16. The first order control system has a
(A) small bandwidth
(B) negative time constant
(C) large negative transfer function pole
(D) Double Poles at origing

Q17. Which of the following device converts temperature into voltage?
(A) Thermocouple
(B) Potentiometer
(C) Wheaton’s bridge
(D) LVDT

Q18. Which of the following can be measured using LVDT?
(A) Displacement
(B) Velocity
(C) Acceleration
(D) All of these

Q19. If the gain of the critical damped system is increased it will behave as
(A) oscillatory
(B) critically damped
(C) overdamped
(D) underdamped

Q20. A phase lag lead network introduces in the output
(A) lag at all frequencies
(B) lag at high frequencies and lead at low frequencies
(C) lag at low frequencies and lead at high frequencies
(D) none of these

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