THREE PHASE INDUCTION MOTORS QUIZ

Stiff

Any of the listed here

Hollow

Flexible

60 Hz

None of the listed here

50 Hz

25 Hz

Smaller

Bigger

Any of the listed here

Same

K × torque with direct switching

k2/torque with direct switching

k/torque with direct switching

K2 × torque with direct switching

Squirrel cage induction motor

None of the listed here

Both squirrel cage and slip ring

Slip ring induction motor

4 %

0.04 %

14%

0.4 %

Bronze

Silicon steel

Aluminium

Cast iron

By auto transformer starting

None of the listed here

Direct on line

Star-delta starting

The number of its poles

The supply frequency

Both supply frequency and number of poles

The maximum flux/poles

Always eqaul to the number of

Always less than the number of

Always greater than the number of

Either more or less than the number of