Induction Motors Quiz

3-phase induction motor is a self-starting machine

• True

• False

3-phase induction motor will have_________ starting torque and __________starting current.

• High, Low

• Low, High

• High, High

• Low, Low

3-phase induction motor will have__________power factor during no load condition

• High

• Low

• Moderate

• Negative

Which of the following 3-phase induction motor requires external resistor circuit in rotor during starting of the motor:

• Slip-Ring Induction Motor

• Squirrel Cage Induction Motor

Which of the following induction motor will have better starting torque?

• Squirrel Cage Induction Motor

• Slip Ring Induction Motor

What happens when Induction motor runs at synchronous speed, motor will

• Burn

• Stop

• Delivers Real Power

• Delivers reactive power

An induction motor always runs at a speed less than synchronous speed

• True

• False

• No Idea

What determines the speed control of a synchronous motor?

• frequency

• current

• voltage

• rotor construction material

3. AC motors should not be driven at a speed higher than ____% above the nameplate rated speed.

• 3

• 5

• 10

• 12

6. An AC drive controls AC motor speed by varying ________________

• current

• frequency

• resistance

• inductance