Cotmac Electronics Electrical Design Engineer Interview Questions and Answers

DOL starter directly connects the motor to the power supply, while Star-Delta starter initially connects the motor in star configuration before switching to delta configuration.

• DOL starter provides full voltage to the motor from the start, causing high starting current and torque.

• Star-Delta starter reduces the starting current and torque by initially connecting the motor in star configuration, then switching to delta c...read more

VFD stands for Variable Frequency Drive. It is a type of motor controller that drives an electric motor by varying the frequency and voltage supplied to the motor.

• VFDs are used to control the speed and torque of AC motors in various applications.

• They work by converting fixed frequency and voltage AC power to variable frequency and voltage output.

• VFDs can improve energy efficiency, reduce wear and tear on motors, and pr...read more

Electricity is the flow of electrons through a conductor.

• Electricity is a form of energy that powers most of our modern devices.

• It is created by the movement of electrons from one atom to another.

• Electricity can be generated from various sources such as coal, wind, solar, and hydro power.

• It can be dangerous if not handled properly and can cause electric shock or fire.

• Electricity is measured in units of volts, amps, and