AUTOMATIC CONTROL SYSTEMS QUIZ

3 and 4

1 and 2

All

1, 2 and 3

False

True

Neither (a) nor (b)

The life of controller

Both (a) and (b)

The level of accuracy

Wind screen wiper

System for controlling antirocket missiles

Respiratory system of animal

Aqualing

Either A or B

Slotted armature

Surface wound with stationary rotor

Surface wound armature

Improves steady state behavior and preserves the transient response of the system

Improves steady state behavior of the system

Improves steady state behavior and speeds up the transient response of the system

Speeds up the transient response of the system

Routh criterion cannot be used to determine stability

Routh criterion can be used by substituting a small negative number for zero and complet-ing the array

Routh criterion can be used by substituting a big positive number for zero and completing the array

Routh criterion can be used by substituting a small positive number for zero and completing the array

None of these

Towards right or left depending on the position of new pole

To the left and making the system more stable

To the right

Nyquist plot

Root locus

Nichols chart

Bode plot

It is symmetric about -180°

(0 dB, -180°) point on Nichols chart represent critical Point (-1, 0)

The frequency at intersection of G(j?) locus and M = +3 dB locus gives bandwidth of closed loop system

M loci are centred about (0 dB, -180°) point