Unit 2 Pre Test

3-Phase Induction Motor has the advantage of Low Cost, Less Maintenance and Rugged Construction

• True

• False

3-Phase Induction Motor is a self starting machine

• True

• False

When Induction Motor is at standstill Slip of the machine will be

• Infinite

• 0

• -1

• 1

3-Phase Induction Motor will have ____ Starting Torque and _____ Starting Current

• High, Low

• Low, High

• High, High

• Low, Low

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

• Squirrel Cage Induction Motor

• Slip-Ring Induction Motor

• Both the Motors

• None of the above

Which of the following method cannot be used for starting of 3-Phase Squirrel Induction Motor

• Line resistor startling

• Auto-transformer Starter

• Rotor Resistance Starting

• DOL Starter

Starting Currents of 3-Phase Induction Motor is about ____ times of the full load current

• 10 to 20

• 5 to 7

• 2 to 3

• 1/2

Which of the following supply is given to the rotor winding of 3-Phase Induction Motor

• No Supply

• AC Supply

• DC Supply

• Pulsating supply

Which type of protection is provided for electrical motor against over heating

• No Load protection

• Short Circuit protection

• Over voltage Protection

• Over load Protection

DOL Starter protects the motor against Over Loading and Single Phasing

• True

• False