100+ Field Engineer Interview Questions and Answers

Insulators, conductors, and semiconductors are materials that have different abilities to conduct electricity.

• Insulators are materials that do not conduct electricity well, such as rubber or glass.

• Conductors are materials that conduct electricity well, such as copper or aluminum.

• Semiconductors are materials that have properties of both insulators and conductors, such as silicon or germanium.

• The ability of a material to conduct electricity is determined by its atomic structure...read more

The tan Delta value of electrical equipment should be as low as possible.

• Tan Delta is a measure of the dielectric losses in electrical equipment.

• A low tan Delta value indicates that the equipment has good insulation properties.

• The tan Delta value can be affected by factors such as temperature, moisture, and aging of the equipment.

• For transformers, a typical tan Delta value is around 0.001 or lower.

The ground clearance of a 400KV transmission line varies depending on various factors.

• The ground clearance of a transmission line is the vertical distance between the lowest point of the conductor and the ground.

• The ground clearance is determined based on safety regulations and requirements.

• Factors that influence the ground clearance include terrain, vegetation, and proximity to buildings or roads.

• In hilly areas, the ground clearance may be higher to account for uneven terrai...read more

Transformers are rated in KVA because it represents the apparent power they can handle.

• KVA stands for kilovolt-ampere, which is a unit of apparent power.

• Transformers are designed to handle a certain amount of power, and the KVA rating indicates their capacity.

• The KVA rating takes into account both the voltage and current that the transformer can handle.

• It helps in determining the appropriate size and capacity of the transformer for a given application.

• For example, a transform...read more

The SF6 gas used for Ckt breaker chamber should be maintained at a pressure of around 5-7 bar.

• The SF6 gas in the circuit breaker chamber should be maintained at a specific pressure to ensure proper functioning.

• The recommended pressure for SF6 gas in the circuit breaker chamber is typically between 5 and 7 bar.

• Maintaining the correct pressure helps in extinguishing the arc during circuit interruption.

• Too low or too high pressure can affect the performance and reliability of th...read more

Answering questions related to engines, petroleum products, and liquid handling

• An ice engine works by using the expansion of frozen gas to generate power

• Efficiency of IC engine can be calculated using the formula: Efficiency = (Work output / Heat input) x 100%

• Stress analysis involves determining the stresses and strains in a material or structure under load

• Petroleum products are refined through a process called fractional distillation

• Petroleum products are categorized into th...read more

The Basis setting of REF protection for a transformer should be determined based on the transformer's characteristics and the system requirements.

• The basis setting of REF (Restricted Earth Fault) protection for a transformer is typically determined by considering the transformer's winding configuration, impedance, and the system's fault level.

• The setting should be chosen to ensure that the protection operates reliably for internal faults while avoiding unnecessary tripping fo...read more

AIS and GIS substations differ in their construction and insulation methods.

• AIS (Air Insulated Substation) uses air as the insulation medium, while GIS (Gas Insulated Substation) uses SF6 gas.

• AIS substations require larger land areas compared to GIS substations.

• GIS substations are more compact and can be installed in urban areas where space is limited.

• AIS substations are more susceptible to environmental factors like pollution and weather conditions.

• GIS substations offer high...read more

ACSRinvar conductors are widely used in metro principal cities due to their high strength and low thermal expansion.

• ACSRinvar conductors have a high tensile strength, making them suitable for long-distance transmission lines in metro cities.

• They have a low coefficient of thermal expansion, which helps in reducing sagging of the conductors and maintaining power transmission efficiency.

• The use of ACSRinvar conductors in metro principal cities ensures reliable and uninterrupted ...read more

Star-star zero phase shift transformer windings are used to provide a balanced three-phase output with zero phase shift between primary and secondary voltages.

• Star-star zero phase shift transformer windings are commonly used in power distribution systems.

• They are used to supply power to three-phase loads such as motors, generators, and transformers.

• The windings are designed in such a way that the voltages in the primary and secondary sides are in phase with each other.

• This co...read more

Oil exploration and production refers to the process of searching for and extracting crude oil from the earth.

• Oil exploration involves identifying potential oil reserves through geological surveys and drilling exploratory wells

• Oil production involves drilling production wells and extracting crude oil from the reservoirs

• The extracted oil is then transported to refineries for processing into various petroleum products

• Oil exploration and production is a complex and expensive pro...read more

A transistor is a semiconductor device used to amplify or switch electronic signals and power.

• Transistors are made of semiconductor materials like silicon or germanium.

• They have three layers - emitter, base, and collector.

• Transistors can be used as amplifiers or switches in electronic circuits.

• They work by controlling the flow of electrons through the base layer.

• Examples of transistor applications include radios, computers, and televisions.

Vibration dampers are used with conductors to reduce the risk of fatigue failure and damage caused by wind-induced vibrations.

• Vibration dampers absorb and dissipate the energy generated by wind-induced vibrations in conductors.

• They help to reduce the risk of fatigue failure and damage to the conductor and associated hardware.

• Vibration dampers are typically installed at regular intervals along the length of the conductor.

• They can be in the form of spiral-shaped devices, weight...read more

Explanation of 2phase and 3phase separator operation, compressor operation, pump operation, P&ID, commissioning, and start-up.

• 2phase separator separates gas and liquid phases, while 3phase separator separates gas, oil, and water phases.

• Compressor increases the pressure of a gas to move it through a pipeline or process.

• Pump transfers fluids by increasing their pressure.

• P&ID (Piping and Instrumentation Diagram) is a schematic representation of a process system.

• Commissioning is ...read more

To communicate technical information about electrical systems to non-technical stakeholders, use simple language, visual aids, analogies, and real-life examples.

• Use simple and non-technical language to explain complex concepts

• Utilize visual aids such as diagrams, charts, or presentations to enhance understanding

• Draw analogies or comparisons to familiar objects or situations

• Provide real-life examples or case studies to illustrate the practical applications

• Encourage questions a...read more

To control costs while maintaining quality in electrical engineering projects, one can focus on efficient project planning, effective resource allocation, and continuous monitoring and optimization.

• Develop a detailed project plan that outlines the scope, timeline, and budget constraints.

• Identify potential cost-saving opportunities such as using energy-efficient components or optimizing design to reduce material usage.

• Allocate resources effectively by matching the skills and e...read more

Integrated circuit is a miniaturized electronic circuit consisting of active and passive components on a single semiconductor chip.

• ICs are used in almost all electronic devices, from smartphones to computers to cars.

• They are used to perform a variety of functions, such as amplification, switching, and signal processing.

• ICs have revolutionized the electronics industry by making devices smaller, faster, and more efficient.

• There are different types of ICs, such as microprocessor...read more

LED stands for Light Emitting Diode. It is a semiconductor device that emits light when an electric current is passed through it.

• LEDs are energy-efficient and have a longer lifespan compared to traditional incandescent bulbs.

• They are commonly used in electronic devices, traffic lights, and automotive lighting.

• LEDs work by converting electrical energy into light energy through a process called electroluminescence.

• They come in different colors and can be used for decorative pur...read more

A photo diode is a semiconductor device that converts light into electrical current. Photo emissivity is the ability of a material to emit electrons when exposed to light.

• Photo diodes are commonly used in optical communication systems and light sensors.

• Photo emissivity is important in the design of photoelectric devices such as solar cells and photomultiplier tubes.

• The efficiency of a photoelectric device depends on the photo emissivity of the material used.

• Photo emissivity i...read more

Phase angle decreases as frequency increases in a series RC circuit.

• As frequency increases, the capacitive reactance decreases, leading to a decrease in phase angle.

• At low frequencies, the capacitive reactance is high, causing a larger phase angle.

• At high frequencies, the capacitive reactance is low, resulting in a smaller phase angle.

To connect 12 batteries for required output, connect them in series or parallel depending on the battery output.

• Check the voltage and current output of each battery

• If the batteries have the same voltage output, connect them in parallel to increase the current output

• If the batteries have different voltage output, connect them in series to increase the voltage output

• Use a battery management system to ensure proper charging and discharging of the batteries

The main function of LA in a substation is to protect electrical equipment from lightning strikes.

• LA stands for Lightning Arrester.

• It is installed in substations to divert lightning strikes away from sensitive equipment.

• LA provides a low-impedance path for lightning current to flow to the ground.

• It helps in preventing damage to transformers, circuit breakers, and other electrical devices.

• LA operates by ionizing the air around it, creating a conductive path for lightning curre...read more

The Schlumberger website URL is www.slb.com.

• www.slb.com is the URL for Schlumberger website

• The website provides information about the company's products and services

• It also has a careers section for job seekers

Yes, as the frequency of the voltage applied to a series RC circuit is increased, the phase angle decreases.

• Increasing frequency means the reactance of the capacitor decreases, leading to a decrease in the phase angle.

• At very high frequencies, the capacitor acts like a short circuit, causing the phase angle to approach zero.

• This phenomenon is important in AC circuits and signal processing applications.

Master instruments are used to measure and calibrate the equipment.

• Master instruments are highly accurate and precise instruments used as a reference to calibrate other instruments.

• The equipment is compared to the master instrument to ensure it is measuring accurately.

• Calibration is done by adjusting the equipment to match the readings of the master instrument.

• Regular calibration ensures the equipment is functioning properly and producing accurate results.

• Examples of master i...read more

Quality assessments and inspections are conducted during various project phases to ensure adherence to standards and identify any issues.

• Develop a quality assurance plan that outlines the objectives, criteria, and methods for assessments and inspections.

• Conduct regular inspections and audits to verify compliance with specifications, codes, and regulations.

• Use checklists and standardized procedures to ensure consistency and thoroughness in assessments.

• Perform inspections at ke...read more

A router is a networking device that forwards data packets between computer networks. A switch is a device that connects devices together on a computer network. WAN and LAN are types of networks. WAN monitoring is the process of monitoring the performance and availability of a wide area network. Troubleshooting is the process of identifying, diagnosing, and resolving problems in a system.

• A router connects multiple networks and forwards data packets between them

• A switch connec...read more

SINR stands for Signal-to-Interference-plus-Noise Ratio. It measures the quality of a wireless communication signal.

• SINR is calculated by measuring the strength of the desired signal, interference, and noise in a communication channel.

• A higher SINR value indicates better signal quality and less interference.

• A good SINR value is typically above 20 dB, while a bad value is below 10 dB.

• SINR is important in determining the data rate and reliability of a wireless connection.

I have extensive field experience in water supply works including construction of OHTs, MS DI HDPE Pipe laying, HSCs Intake head works Jackwel.

• Experience in constructing Overhead Tanks (OHTs) for water storage

• Expertise in laying MS DI HDPE pipes for water supply

• Proficient in constructing Head Works Jackwel for water intake

• Skilled in constructing High Service Reservoirs (HSCs) for water storage

There are various types of air compressor houses and gas cleaning plants depending on their size, capacity, and application.

• Types of air compressor houses: reciprocating, rotary screw, centrifugal, and axial flow

• Types of gas cleaning plants: electrostatic precipitators, fabric filters, scrubbers, and cyclones

• The selection of the type of compressor house and gas cleaning plant depends on the specific requirements of the industry or application

• The size and capacity of the compr...read more

HDPE pipes are joined using various methods including butt fusion, electrofusion, and mechanical joining.

• Butt fusion involves heating the ends of two pipes and then pressing them together to form a permanent joint.

• Electrofusion uses a special fitting with embedded heating elements to melt the pipe ends together.

• Mechanical joining methods include compression fittings, flange connections, and push-fit fittings.

• The time it takes to joint HDPE pipes depends on the method used and...read more

The rating of a transformer is in kVA and the current can be found using the formula: Current (A) = kVA / (1.732 x Voltage)

• Transformer rating is in kVA (kilo-volt-ampere)

• To find the current in a transformer, use the formula: Current (A) = kVA / (1.732 x Voltage)

• For example, if a transformer has a rating of 100 kVA and operates at 480V, the current would be 100 / (1.732 x 480) = 120.7A

A thermocouple is a temperature sensor that works on the principle of the Seebeck effect. It consists of two dissimilar metals.

• Thermocouples generate a voltage when there is a temperature difference between the two junctions.

• The voltage generated is proportional to the temperature difference.

• Common types of thermocouples include Type K, Type J, and Type T.

• Type K thermocouples are made of chromel and alumel and can measure temperatures up to 1,372°C.

• Type J thermocouples are ma...read more

Transformer is an electrical device that transfers electrical energy from one circuit to another through electromagnetic induction.

• Transformers consist of two coils of wire, known as primary and secondary, wound around a magnetic core.

• The primary coil is connected to an AC voltage source, which creates a magnetic field that induces a voltage in the secondary coil.

• Transformers are used to step up or step down voltage levels in power transmission and distribution systems.

• KCL (K...read more

Yes, I am familiar with instrument calibration.

• I have experience calibrating various instruments such as pressure gauges, thermometers, and flow meters.

• I understand the importance of calibration in ensuring accurate measurements and maintaining quality control.

• I am familiar with calibration procedures and documentation.

• For example, I have calibrated a pressure gauge using a deadweight tester and recorded the results in a calibration certificate.

A pyrometer is a device used to measure high temperatures without making physical contact with the object being measured.

• Pyrometers use the principle of thermal radiation to measure temperature.

• They are commonly used in industrial settings to monitor and control temperature in processes such as metalworking, glass manufacturing, and furnace operation.

• Pyrometers can measure temperatures ranging from a few hundred degrees Celsius to several thousand degrees Celsius.

• They are non...read more

Single mode fiber has a smaller core diameter and allows for higher bandwidth and longer distances than multimode fiber.

• Single mode fiber has a core diameter of 9 microns, while multimode fiber has a core diameter of 50 or 62.5 microns.

• Single mode fiber allows for higher bandwidth and longer distances than multimode fiber.

• Multimode fiber is less expensive than single mode fiber.

• Single mode fiber is commonly used in long-distance telecommunications and data transmission, while...read more

Various types of conductors include copper, aluminum, and steel.

• Copper: highly conductive, commonly used in electrical wiring

• Aluminum: lighter and cheaper than copper, used in power lines

• Steel: used in overhead transmission lines for strength and durability

LAN stands for Local Area Network. It is a network that connects computers and devices within a limited area, such as a home, office, or building.

• LAN is a network that allows computers and devices to communicate with each other within a small geographic area.

• It is typically used in homes, offices, schools, and other small-scale environments.

• LANs can be wired or wireless, using technologies like Ethernet or Wi-Fi.

• LANs provide high-speed data transfer and resource sharing among...read more

The test procedure for floating head heat exchangers involves several steps to ensure proper functioning and performance.

• Inspect the heat exchanger for any visible damage or leaks.

• Check the condition of the gaskets and replace if necessary.

• Verify that the floating head is properly aligned and secured.

• Connect the necessary instruments to measure temperature, pressure, and flow rate.

• Start the test by circulating the fluid through the heat exchanger.

• Monitor the temperature and p...read more

The minimum thickness of a slab depends on various factors such as load, span, and material used.

• The minimum thickness of a slab is determined by the load it needs to support. Heavier loads require thicker slabs.

• The span or distance between supports also affects the minimum thickness. Longer spans may require thicker slabs.

• The material used for the slab also plays a role. Different materials have different strength properties, influencing the minimum thickness.

• For example, a ...read more

The number of fibers and tubes in a 48f fiber cable and its color code.

• A 48f fiber cable typically has 6 tubes with 8 fibers in each tube.

• The color code for fiber cables is standardized as per TIA-598-C.

• The color code for the fibers in a tube is typically blue, orange, green, brown, slate, white, red, and black.

Resolution is the smallest distinguishable change in a measurement, while accuracy is how close a measurement is to the true value.

• Resolution refers to the smallest increment of measurement that can be detected by an instrument.

• Accuracy refers to how close a measurement is to the true value or accepted standard.

• Resolution and accuracy are both important factors in determining the quality of a measurement.

• For example, a ruler with a resolution of 1 millimeter can only measure ...read more

Transformers, CTs, PTs, and surge arrestors are electrical components used in power systems to regulate voltage and protect equipment.

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

• CTs (Current Transformers) are used to measure current in power systems.

• PTs (Potential Transformers) are used to measure voltage in power systems.

• Surge arrestors are used to protect equipment from voltage spikes and surges.

An intrinsic semiconductor is a pure semiconductor with no impurities added.

• Intrinsic semiconductors have equal numbers of electrons and holes.

• They have a low conductivity at room temperature.

• Examples include silicon and germanium.

• They are used in electronic devices such as diodes and transistors.

To determine the location of a broken fiber, I would use an OTDR and then fix it by splicing or replacing the damaged section.

• Use an Optical Time Domain Reflectometer (OTDR) to analyze the fiber and locate the break.

• Once the break is identified, the damaged section can be spliced back together or replaced.

• Splicing involves fusing the two ends of the fiber together using a fusion splicer.

• If the break is severe or in an inaccessible location, the entire fiber may need to be rep...read more

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