Electrical Maintenance Department Interview Questions and Answers for Freshers

DC motors use direct current to generate rotational motion, while AC motors use alternating current.

• DC motors have a commutator and brushes to switch the current direction, while AC motors do not.

• AC motors are more commonly used in household appliances, while DC motors are used in electric vehicles and industrial machinery.

• Examples of DC motors include brushed and brushless motors, while examples of AC motors include induction and synchronous motors.

I studied various subjects related to electrical engineering in my college.

• Electrical Machines

• Power Electronics

• Control Systems

• Electrical Measurements and Instrumentation

• Electromagnetic Theory

• Digital Electronics

• Microprocessors and Microcontrollers

• Power Systems

• Renewable Energy Sources

• Electrical Circuit Analysis

There are two types of current - AC and DC.

• AC stands for Alternating Current and changes direction periodically.

• DC stands for Direct Current and flows in one direction only.

• AC is used for power transmission over long distances while DC is used for electronic devices.

• Examples of AC sources include power grids and generators while batteries are a common source of DC.

• AC voltage can be stepped up or down using transformers while DC voltage cannot be easily transformed.

• AC is more ...read more