Trainee Electrical Engineer Interview Questions and Answers for Freshers

Wiring of home is always in parallel connection for safety, efficiency, and flexibility.

• Parallel wiring allows each electrical device to operate independently.

• If one device fails, others continue to function.

• Parallel wiring reduces the risk of overloading and overheating.

• It provides flexibility to add or remove devices without affecting others.

• Parallel wiring ensures consistent voltage across devices.

• Examples: outlets, switches, light fixtures in a home are wired in parallel.

ACSR conductor is used in transmission lines due to its high strength, low cost, and good conductivity.

• ACSR (Aluminum Conductor Steel Reinforced) conductor is made up of aluminum strands surrounded by steel wires.

• The steel core provides strength and support, while the aluminum strands offer good conductivity.

• The combination of aluminum and steel makes ACSR conductor lightweight and durable.

• ACSR conductor has a high tensile strength, allowing it to withstand the mechanical str...read more

Silicon is commonly used as a semiconductor material due to its abundance, versatility, and desirable electrical properties.

• Silicon is the second most abundant element on Earth, making it readily available and cost-effective.

• It has a stable crystal structure, allowing for consistent and reliable performance.

• Silicon has a moderate bandgap, which enables it to conduct electricity under certain conditions and act as an insulator under others.

• It can be doped with impurities to al...read more

DC series motors are used for trains due to their high starting torque and ability to handle heavy loads.

• DC series motors have a high starting torque, which is necessary for accelerating heavy trains from rest.

• These motors can handle heavy loads and provide sufficient power to move the train even on steep gradients.

• DC series motors offer good speed control and can be easily reversed for braking.

• They are relatively simple and robust, requiring less maintenance compared to othe...read more