THREE PHASE INDUCTION MOTORS QUIZ

Shaft

None of these

Stator core

Bearings

Its power factor goes on increasing up to full load and then it falls again

Its power factor goes on increasing even after full load

Its power factor remains constant

Its power factor goes on decreasing

Small

Large

Absent

Infinity

2400 rpm

1200 rpm

1600 rpm

400 rpm

Self induction

Hysteresis

Mutual induction

Eddy currents

(S-1) × rotor input

(1+S) × rotor input

S × rotor input

(1-S) × rotor input

None of the listed here

Open circuited

Supplying a variable resistive load

Short-circuited

Rotor emf

Shaft diameter

Rotor current

Rotor power factor

Either more or less than the number of

Always less than the number of

Always eqaul to the number of

Always greater than the number of

Stator slots are equal to rotor slots

None of the listed here

Stator slots are exact multiple of rotor slots

Stator slots are not exact multiple of rotor slots