Electrical Operations and Maintenance Engineer Interview Questions and Answers

Circuit breakers are electrical switches designed to protect electrical circuits from damage caused by overload or short circuit. There are several types of circuit breakers.

• Circuit breakers automatically interrupt the flow of electricity when a fault is detected in the circuit.

• They are essential for protecting electrical equipment and preventing electrical fires.

• Common types of circuit breakers include thermal-magnetic, magnetic, and hydraulic-magnetic circuit breakers.

• Each ...read more

One advanced technology developed recently is 5G network technology.

• 5G network technology offers faster internet speeds and lower latency compared to previous generations.

• It enables the development of new applications such as autonomous vehicles, smart cities, and virtual reality.

• Companies like Verizon, AT&T, and T-Mobile have been rolling out 5G networks in various cities around the world.

The earthing port of a wire is thicker than live and neutral to ensure safety and provide a low-resistance path for fault currents.

• Earthing is essential to protect against electric shock and to prevent damage to electrical equipment.

• Thicker earthing wire reduces resistance and allows fault currents to flow easily, facilitating the operation of protective devices like circuit breakers.

• The larger cross-sectional area of the earthing wire helps dissipate heat generated during fa...read more

Managing voltage frequency involves regulating and controlling the voltage and frequency levels in an electrical system.

• Use voltage regulators to maintain a stable voltage level

• Use frequency converters to adjust the frequency as needed

• Monitor voltage and frequency using meters and sensors

• Implement load shedding or load balancing techniques to manage fluctuations

• Ensure proper maintenance and inspection of electrical equipment

• Coordinate with power grid operators to maintain syn...read more

A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.

• Transformers consist of two coils of wire, known as the primary and secondary windings.

• They work on the principle of electromagnetic induction, where a changing current in the primary coil induces a voltage in the secondary coil.

• Transformers are used to step up or step down voltage levels in electrical systems.

• Common types of transformers inclu...read more