100+ Electrical Site Engineer Interview Questions and Answers

Electrical equipment and tools require proper understanding of their working principles and maintenance needs.

• Understanding the specifications and operating instructions of each equipment/tool is crucial

• Regular maintenance and calibration are necessary to ensure optimal performance

• Proper training on safe handling and operation of equipment/tools is essential

• Using appropriate personal protective equipment (PPE) when working with electrical tools is a must

• Being aware of potenti...read more

11 kV distribution line poles are typically made of materials like concrete, steel, or wood.

• Common materials used for 11 kV distribution line poles include concrete, steel, and wood.

• Concrete poles are durable and resistant to corrosion, making them suitable for harsh environments.

• Steel poles are strong and can be easily customized for specific requirements.

• Wood poles are cost-effective and easy to install, but may require more maintenance.

• The choice of material depends on fac...read more

Distance between two poles in LT distribution line varies depending on the voltage and design standards.

• The distance between two poles in LT distribution line is typically around 30-50 meters.

• The distance may vary based on factors such as voltage rating, terrain, and local regulations.

• In urban areas, the distance between poles may be shorter compared to rural areas.

• Design standards such as IS 5613:1985 provide guidelines for spacing between poles in LT distribution lines.

The voltage drop for a cable length of 40m depends on the cable size, current flow, and resistance.

• The cable size and current flow determine the resistance of the cable.

• The resistance of the cable determines the voltage drop.

• The voltage drop can be calculated using Ohm's Law: V = IR.

• For example, a 40m length of 2.5mm² cable carrying a current of 10A would have a voltage drop of approximately 1.6V.

Managing manpower on site involves proper planning, communication, supervision, and coordination.

• Create a detailed schedule outlining tasks and responsibilities for each worker.

• Communicate effectively with the team to ensure everyone is aware of their roles and deadlines.

• Supervise the work progress regularly to identify any issues or delays.

• Coordinate with other teams or departments to avoid conflicts and ensure smooth workflow.

• Provide necessary training and support to improv...read more

CT stands for Current Transformer, PT stands for Potential Transformer, and LA stands for Lightning Arrester.

• CT is used to measure and protect against high currents in electrical systems.

• PT is used to step down high voltage to a safe and measurable level.

• LA is used to protect electrical equipment from lightning strikes by diverting the lightning current to the ground.

• CT and PT are commonly used in power distribution systems, while LA is used in lightning protection systems.

HT cables are used for high voltage transmission while LT cables are used for low voltage transmission.

• HT cables have higher insulation and thicker conductor compared to LT cables.

• HT cables are used for transmission of electricity over long distances while LT cables are used for distribution of electricity within a building or a locality.

• HT cables are more expensive than LT cables.

• HT cables are usually installed underground while LT cables can be installed overhead or undergr...read more

Distribution boards are used to distribute electrical power to various circuits and equipment.

• Main distribution board (MDB) is used to distribute power to sub-distribution boards.

• Sub-distribution boards (SDB) are used to distribute power to final circuits.

• Final distribution boards (FDB) are used to distribute power to equipment.

• Motor control centers (MCC) are used to control and distribute power to motors.

• Lighting distribution boards (LDB) are used to distribute power to ligh...read more

RCCB and MCB are both electrical protection devices, but they differ in their functionality and applications.

• RCCB stands for Residual Current Circuit Breaker, while MCB stands for Miniature Circuit Breaker.

• RCCB is designed to protect against electrical leakage and ground faults, while MCB is primarily used for overcurrent protection.

• RCCB detects the imbalance in current between the live and neutral wires, while MCB detects excessive current flow.

• RCCB trips the circuit when it...read more

Fuse is a safety device that protects electrical circuits from overloading and short circuits.

• Fuse is a thin wire or filament that melts when excessive current flows through it.

• It is connected in series with the circuit and breaks the circuit when it melts.

• Fuse prevents damage to electrical equipment and prevents electrical fires.

• Different types of fuses are available for different applications, such as fast-acting fuses for sensitive equipment and slow-blow fuses for motors....read more

An electric shock is a sudden discharge of electricity through a person's body, causing injury or even death.

• An electric shock occurs when a person comes into contact with a source of electricity.

• The severity of an electric shock depends on the voltage, current, and duration of exposure.

• Symptoms of an electric shock can range from mild tingling to muscle contractions and burns.

• Examples of sources of electric shock include faulty electrical appliances, exposed wires, and light...read more

Transformer types include step-up, step-down, isolation, autotransformer, and distribution transformers.

• Step-up transformer increases voltage output

• Step-down transformer decreases voltage output

• Isolation transformer provides electrical isolation between primary and secondary windings

• Autotransformer has a single winding with multiple taps for different voltage levels

• Distribution transformer is used to supply power to residential and commercial areas

Motors testing involves checking the performance and efficiency of various types of motors used in electrical systems.

• Motors testing includes checking for insulation resistance, winding resistance, and current and voltage levels.

• Types of motors include AC motors (induction, synchronous), DC motors (brushed, brushless), and special types like stepper motors.

• Testing methods may vary depending on the type of motor and its application.

• Examples of motor testing equipment include i...read more

Airtel is a telecommunications company that has experienced significant growth in recent years.

• Airtel has expanded its network coverage to reach more customers.

• The company has introduced new services and products to meet the evolving needs of its customers.

• Airtel has invested in infrastructure development to improve network quality and reliability.

• The company has acquired other telecommunications companies to expand its market presence.

• Airtel has implemented innovative market...read more

HT cables are high tension cables used for transmitting high voltage electricity, while LT cables are low tension cables used for distributing low voltage electricity.

• HT cables are used for transmitting electricity at high voltages, typically above 11kV.

• LT cables are used for distributing electricity at low voltages, typically below 1kV.

• HT cables have thicker insulation and are designed to withstand higher voltages.

• LT cables are more flexible and easier to install compared to...read more

2 way wiring is a type of electrical wiring that allows for a single light or appliance to be controlled from two different locations.

• In 2 way wiring, two switches are used to control a single light or appliance.

• The switches are connected in parallel to each other and to the light or appliance.

• This type of wiring is commonly used in staircases, hallways, and rooms with multiple entry points.

• 2 way wiring provides convenience and flexibility in controlling the lighting or appli...read more

PV cell converts sunlight into electricity through the photovoltaic effect.

• PV cell absorbs sunlight and converts it into DC electricity

• Consists of semiconductor materials like silicon

• When sunlight hits the cell, electrons are knocked loose and create a flow of electricity

• Used in solar panels to generate renewable energy

Different types of cable trays include ladder, perforated, solid bottom, wire mesh, and trough.

• Ladder cable trays have horizontal cross members resembling a ladder.

• Perforated cable trays have small holes for ventilation and drainage.

• Solid bottom cable trays have a solid base for supporting cables.

• Wire mesh cable trays have a grid-like structure for easy cable installation.

• Trough cable trays have a U-shaped design for containing cables.

Feeder bifurcation is the splitting of a main feeder into multiple branches to distribute power to different areas.

• Feeder bifurcation is a common practice in electrical engineering to efficiently distribute power.

• It involves splitting a main feeder into smaller branches to supply power to different sections or loads.

• Each branch may have its own circuit protection and control devices.

• Feeder bifurcation helps in balancing the load and preventing overloading of the main feeder.

• E...read more

Types of motors include AC motors, DC motors, synchronous motors, and induction motors.

• AC motors: Alternating current motors that are commonly used in household appliances and industrial applications.

• DC motors: Direct current motors that are used in applications where speed control is important, such as in electric vehicles.

• Synchronous motors: Motors that operate at a fixed speed and are often used in applications where precise timing is required, such as in clocks.

• Induction ...read more

The process of new meter installation involves site survey, meter selection, installation, testing, and commissioning.

• Site survey to determine the location and requirements for the new meter

• Meter selection based on the specific needs and specifications of the site

• Installation of the new meter by qualified electricians or engineers

• Testing the meter to ensure accurate readings and proper functionality

• Commissioning the meter to make it operational and connected to the electrical...read more

HT and LT panels are electrical distribution panels used to control and distribute power at high and low voltages, respectively.

• HT Panel stands for High Tension Panel and is used to control and distribute power at high voltages, typically above 440V.

• LT Panel stands for Low Tension Panel and is used to control and distribute power at low voltages, typically below 440V.

• HT Panels are used in industries, power plants, substations, etc., while LT Panels are used in commercial and ...read more

ACSR stands for Aluminum Conductor Steel Reinforced, used in overhead power lines for its strength and conductivity.

• ACSR conductors consist of aluminum strands surrounding a steel core.

• The steel core provides tensile strength, making ACSR suitable for long spans.

• Common types include ACSR 'Rabbit', 'Dog', and 'Wolf', each with different specifications.

• ACSR is widely used in transmission and distribution lines due to its lightweight and durability.

General Arrangement drawings show the overall layout of electrical systems in a building or structure.

• GA drawings provide an overview of the entire electrical system layout

• They include details such as equipment locations, cable routing, and connection points

• These drawings are essential for understanding the overall design and installation of electrical systems

• Examples of GA drawings include floor plans with electrical equipment locations marked, cable tray layouts, and panel ...read more

Anticarsia gemmatalis, also known as the velvetbean caterpillar, is a common pest in agriculture.

• Anticarsia gemmatalis is a species of moth in the family Erebidae.

• It is a major pest of soybean crops, feeding on the leaves and causing significant damage.

• Control measures for velvetbean caterpillars include biological control agents, insecticides, and crop rotation.

• Monitoring for early signs of infestation can help prevent widespread damage to crops.

Yes, I am willing to travel all over India for the job.

• I am flexible and adaptable to new environments

• I have experience working in different parts of India

• I understand the importance of being on-site for electrical projects

• I am willing to make the necessary arrangements for travel and accommodation

Emergency fault found for duties requires immediate action to resolve the issue and prevent any further damage or safety hazards.

• Identify the nature and location of the fault

• Assess the severity of the fault and potential impact on operations

• Implement immediate corrective actions to address the fault

• Communicate with relevant stakeholders to coordinate response and mitigation efforts

• Document the fault, actions taken, and outcomes for future reference

The safety equipment per site is the responsibility of the site engineer.

• Ensuring all safety equipment is available and in working condition on site

• Regularly inspecting safety equipment to ensure compliance with regulations

• Training site personnel on proper use of safety equipment

• Maintaining records of safety equipment inspections and maintenance

• Coordinating with safety officers to address any safety equipment concerns

Electrical engineering is a field of engineering that deals with the study and application of electricity, electronics, and electromagnetism.

• Involves designing, developing, testing, and supervising the production of electrical equipment and systems

• Includes working with power generation, transmission, distribution, and utilization

• Incorporates knowledge of electronics, electromagnetism, and computer systems

• Applies principles of physics and mathematics to solve electrical proble...read more

Myvan project process involves planning, designing, implementation, testing, and commissioning of electrical systems.

• Planning phase involves determining project scope, budget, and timeline.

• Design phase includes creating electrical drawings and specifications.

• Implementation phase involves installing electrical components and systems.

• Testing phase ensures that all electrical systems are functioning properly.

• Commissioning phase involves final inspection and handover to the clien...read more

A motor starter circuit diagram is used to start and stop an electric motor.

• Motor starters typically consist of a contactor, overload relay, and start/stop buttons.

• The contactor is used to switch the motor on and off.

• The overload relay protects the motor from overheating.

• The start/stop buttons are used to control the motor.

• The circuit diagram shows the connections between these components.

Yes, I have testing experience in electrical systems.

• I have conducted various tests on electrical systems to ensure their functionality and safety.

• I am familiar with testing equipment such as multimeters, oscilloscopes, and insulation testers.

• I have experience in conducting tests for electrical installations, equipment, and components.

• I am knowledgeable in interpreting test results and identifying potential issues.

• For example, I have conducted insulation resistance tests on e...read more

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

• Transformers are used to increase or decrease voltage levels in electrical systems to suit the requirements of different devices.

• They help in transmitting electricity over long distances with minimal loss.

• Transformers also provide isolation between the input and output circuits for safety purposes.

• They are essential in power distribution systems to match the voltage levels between generators an...read more

A feeder is an electrical circuit that carries power from a substation to a distribution point.

• Feeder is a part of the electrical distribution system.

• It carries power from a substation to a distribution point.

• It can be overhead or underground.

• It is usually protected by fuses or circuit breakers.

• Examples of feeders include power lines, cables, and busbars.

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

• Transformers work on the principle of electromagnetic induction.

• They consist of two or more coils of wire, known as windings, which are wound around a core made of magnetic material.

• The primary winding is connected to the input voltage source, while the secondary winding is connected to the load.

• When an alternating current (AC) flows through th...read more

JMS stands for Java Message Service, a messaging standard that allows applications to communicate asynchronously.

• JMS is a Java-based messaging system used for exchanging messages between two or more clients.

• It provides a reliable and flexible way to send messages between distributed systems.

• JMS supports both point-to-point and publish-subscribe messaging models.

• It uses a message-oriented middleware to handle the communication between clients.

• JMS is commonly used in enterprise...read more

A resistor is an electrical component that resists the flow of electrical current, causing a drop in voltage.

• Resistors are used to control the amount of current flowing in a circuit.

• They are measured in ohms (Ω) and have color-coded bands to indicate their resistance value.

• Resistors can be fixed or variable, with variable resistors allowing for adjustable resistance.

• Examples of resistors include carbon film resistors, metal film resistors, and wirewound resistors.

sLD stands for Short Circuit Lateral Displacement.

• sLD is a phenomenon that occurs in high voltage power systems.

• It is caused by the magnetic forces generated during a short circuit.

• These forces can cause conductors to move laterally, potentially causing damage to equipment.

• sLD can be mitigated through proper design and installation of power systems.

• Examples of equipment that can be affected by sLD include transformers, circuit breakers, and busbars.

LT cable specifications refer to the specifications of low tension cables used in electrical installations.

• LT cables are typically rated for voltages up to 1kV.

• They are commonly used for power distribution in residential and commercial buildings.

• LT cables are insulated with materials such as PVC or XLPE for protection against electrical faults.

• Specifications may include conductor material, insulation type, voltage rating, and current carrying capacity.

• Examples of LT cable spe...read more

Conductor rating refers to the maximum current-carrying capacity of a conductor without exceeding its temperature limits.

• Conductor rating is determined by factors such as conductor material, size, insulation, and ambient temperature.

• It is important to select a conductor with a rating that can safely carry the expected current without overheating.

• Conductor rating is usually expressed in terms of ampacity, which is the maximum current a conductor can carry continuously without ...read more

Transformer ratios refer to the ratio of the number of turns in the primary winding to the number of turns in the secondary winding.

• Transformer ratios determine the voltage transformation from primary to secondary winding.

• For example, a transformer with a turns ratio of 1:2 will double the voltage from primary to secondary winding.

• Transformer ratios are crucial in determining the output voltage of a transformer based on the input voltage.

Transformer works on the principle of electromagnetic induction to transfer electrical energy between two or more circuits.

• Transformers have two coils of wire, known as primary and secondary coils.

• When an alternating current flows through the primary coil, it creates a changing magnetic field.

• This changing magnetic field induces a voltage in the secondary coil, transferring electrical energy.

• Transformers are used to step up or step down voltage levels in power distribution sy...read more

Voc can be checked using a multimeter or a solar simulator.

• Use a multimeter to measure the open-circuit voltage of a solar panel

• Use a solar simulator to simulate sunlight and measure the Voc

• Ensure that the panel is not connected to any load or circuit while measuring Voc

Motor starters are devices used to start and stop motors. There are various types of motor starters.

• Direct On Line (DOL) starters

• Star-Delta starters

• Soft starters

• Variable Frequency Drive (VFD) starters

• Auto transformer starters

The principle of motor involves converting electrical energy into mechanical energy to produce motion.

• Motors operate based on the principle of electromagnetic induction

• Electric current flowing through a wire in a magnetic field creates a force that causes the wire to move

• This movement is harnessed to produce mechanical energy and drive motion

• Examples include DC motors, AC motors, and stepper motors

Transformers are devices that transfer electrical energy between two or more circuits through electromagnetic induction.

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

• Common types of transformers include power transformers, distribution transformers, and instrument transformers.

• Power transformers are used in power generation and transmission systems.

• Distribution transformers are used to supply power to residential and commercial buildings.

• I...read more

A circuit is a closed loop through which an electric current can flow.

• A circuit consists of a power source, conductors, load, and a switch.

• Electric current flows from the power source through the conductors to the load.

• Examples of circuits include simple ones like a flashlight circuit or complex ones like a computer motherboard.