ALLIGATION OR MIXTURE PROBLEMS QUIZ

True

False

True

False

It is symmetric about -180°

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

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

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

False

True

Increases the stability margin

Speeds up the transient response

Increases the stability margin and speeds up the transient-response.

None of these

To the right

To the left and making the system more stable

None of these

Towards right or left depending on the position of new pole

Rotor

Either (a) or (b)

Partly on stator and partly on rotor

Stator

Charge

Magnetic flux linkage

Voltage

Electrostatic energy

Thermal systems

Hydraulic systems and thermal systems

Thermal, hydraulic and pneumatic systems

Pneumatic systems

Both A and B

None of these

The gain is increased beyond upper critical value

The gain is decreased below lower critical value