10+ Ezeiatech Systems Interview Questions and Answers

3 core PT & 1 core PT are types of power transformers used in electrical systems.

• 3 core PT has three separate cores for voltage measurement while 1 core PT has only one core.

• 3 core PT is more accurate and reliable than 1 core PT.

• 3 core PT is used in high voltage applications while 1 core PT is used in low voltage applications.

• Both types of PT are used to step down high voltage to a lower voltage for measurement or protection purposes.

Substation and Transmission Projects can be managed and controlled by effective planning, communication, and monitoring.

• Develop a detailed project plan with clear timelines and milestones

• Establish regular communication channels with all stakeholders

• Monitor progress and identify potential risks or issues

• Implement corrective actions as necessary

• Ensure compliance with all relevant regulations and standards

• Maintain accurate documentation and reporting

• Provide adequate training and...read more

A lightning arrestor protects electrical systems from lightning strikes by diverting excess voltage safely to the ground.

• Diverts lightning strikes away from sensitive equipment.

• Prevents damage to electrical systems and buildings.

• Commonly used in telecommunication towers and power lines.

• Example: A lightning rod on a rooftop directs lightning safely to the ground.

A substation is an electrical system that converts high voltage to low voltage or vice versa. ACSR conductors are used in power transmission.

• Substations are used to control and distribute electrical power

• They can be classified as step-up or step-down substations

• ACSR conductors are made up of aluminum wires wrapped around a steel core

• Types of ACSR conductors include Lynx, Panther, Zebra, etc.

The question is asking for the cost of aluminum per day for a tower pit marking of 132 square feet.

• Calculate the total amount of aluminum needed for the tower pit marking

• Determine the cost of aluminum per square foot

• Multiply the cost per square foot by the total area to get the daily cost

Ohm's law is a fundamental law in electrical engineering that relates the current flowing through a conductor to the voltage applied across it. Power system refers to the network of electrical components and devices that generate, transmit, and distribute electrical power.

• Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points.

• Power system includes generators, transformers, transmission lines, dist...read more

RTD stands for Resistance Temperature Detector, a device used to measure temperature by correlating resistance with temperature changes.

• RTDs are widely used in industrial applications for accurate temperature measurement.

• They operate on the principle that the electrical resistance of a metal changes with temperature.

• Common materials for RTDs include platinum, nickel, and copper, with platinum being the most popular due to its stability.

• RTDs provide high accuracy and repeatabi...read more

CT stands for Current Transformer and PT stands for Potential Transformer.

• CT is used to measure high currents by stepping down the current to a manageable level.

• PT is used to measure high voltages by stepping down the voltage to a safe level.

• CTs and PTs are commonly used in electrical power systems for protection, metering, and control purposes.

• CTs and PTs are typically connected to instruments such as relays, meters, and protective devices.

• For example, a CT may be used to me...read more

HVDC (High Voltage Direct Current) and HVAC (High Voltage Alternating Current) differ in transmission efficiency and application.

• HVDC transmits electricity over long distances with lower losses compared to HVAC.

• HVAC is commonly used for local distribution, while HVDC is preferred for intercontinental connections.

• HVDC systems require fewer conductors than HVAC systems, making them more space-efficient.

• HVDC can connect asynchronous power grids, while HVAC cannot.

• Examples: HVDC ...read more

PLC SCADA refers to Programmable Logic Controllers and Supervisory Control and Data Acquisition systems used in industrial automation.

• PLC (Programmable Logic Controller) is a digital computer used for automation of electromechanical processes.

• SCADA (Supervisory Control and Data Acquisition) is a system for remote monitoring and control of industrial processes.

• PLCs are used in manufacturing lines, while SCADA systems are used in utilities like water treatment and power generat...read more

Single Line Diagram (SLD) of a substation illustrates electrical connections and components for clarity and analysis.

• SLD includes major components like transformers, circuit breakers, and busbars.

• It shows the interconnections between different equipment.

• Example: A transformer connected to a busbar with circuit breakers for protection.

• SLD helps in understanding power flow and system operation.

• It is essential for maintenance and troubleshooting.

Stelmec is a leading provider of electrical solutions for industrial and commercial projects.

• Specializes in electrical engineering and contracting services

• Offers turnkey solutions for power distribution, automation, and control systems

• Has a strong track record of successful project completions

• Works with a wide range of industries including manufacturing, oil & gas, and infrastructure

• Known for delivering high-quality and reliable electrical solutions

A circuit diagram is a visual representation of an electrical circuit showing how components are connected.

• Circuit diagrams use symbols to represent components like resistors, capacitors, and transistors.

• Lines represent wires connecting the components.

• Arrows indicate the direction of current flow.

• Circuit diagrams help engineers understand and troubleshoot circuits.

• Example: A simple circuit diagram for a light bulb connected to a battery.