Q. Consider the following statements about root locus

1. The intersection of root locus branches with the imaginary axis can be determined by the use of Routh criterion
2. Segments of real axis having an odd number of real axis open loop poles plus zeros to their right are not parts of root locus
3. The number of root locus branches terminating on infinity is always zero

Which of the above statements are correct?

View solution

Q. The poles with greater displacement from the real axis correspond to

View solution

Q. Which of the following is open loop system?

View solution

Q. Which of the following is used to obtain output position in a position control system?

View solution

Q. In a synchro transmitter-control transformer, the voltage induced in rotor winding of control transformer is zero when the angular displacement between rotors of transmitter and transformer is

View solution

Q. DC tachogenerator can be used in

View solution

Q. Assertion (A): If points at infinity are included, G(s) has same number of poles and zeros.

Reason (R): The function G(s) = K(s+2) / (s+5)² has a zero at s = - 2.

View solution

Q. If the characteristic equation is (λ + 1) (λ + 2) (λ + 3) = 0, the eigen values are

View solution

Q. Lag compensation permits a high gain at low frequencies.

View solution

Q. If the poles lie in second quadrant, damping ratio is

View solution

Q. 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.

View solution

Q. The effect of adding poles and zeros can be determined quickly by

View solution

Q. In force current analogue, mechanical mobility is analogous to

View solution

Q. If any term in the first column of a Routh array becomes zero, then

View solution

Q. Which of the following features is not associated with Nichols chart?

View solution

Q. Which of the following can be used as a rotating amplifier in a control system?

1. Amplidyne
2. Separately excited dc generator
3. Synchro
4. Self excited dc generator

Select the answer from the following codes:

View solution

Q. A lead compensator

View solution

Q. For type 1 system the velocity lag error is

View solution

Q. For G(jω) = 1 / (1+jωT) as ω approaches infinity, the magnitude approaches zero and phase angle approaches - 90°.

View solution

Q. Nyquist stability criterion uses open loop frequency response characteristics.

View solution