Electrical Engineer Intern Interview Questions and Answers

Single phase motors are self-starting while 3 phase motors require external starting devices.

• Single phase motors have a starting winding that creates a rotating magnetic field to start the motor

• 3 phase motors require external starting devices like a motor starter or VFD to create the rotating magnetic field

• Single phase motors are commonly used in household appliances while 3 phase motors are used in industrial applications

Design an interruptible power supply for a booster

• Determine power requirements of the booster

• Select appropriate battery capacity and type

• Design circuit with automatic switch-over to battery power during power outage

• Include surge protection and voltage regulation

• Test the system for reliability and efficiency