200+ 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

The type of transformer used in telecom tower sites is typically a step-down transformer.

• Step-down transformers are used to reduce the high voltage from the power grid to a lower voltage suitable for telecom equipment.

• These transformers are usually single-phase and have a power rating of a few kilovolt-amperes (kVA).

• They are designed to provide a stable and reliable power supply to the telecom equipment at the tower site.

• Examples of step-down transformers used in telecom towe...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

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.

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

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

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

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

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.

Identify AC and DC cables using multimeter, visual inspection, and cable markings.

• Use a multimeter: Set it to measure voltage; AC will show a sine wave, while DC will show a steady value.

• Check for cable markings: AC cables often have 'AC' or '~' symbols, while DC cables may have 'DC' or '-' symbols.

• Look at the connectors: AC connectors are usually round and may have a polarized design, while DC connectors are often barrel-shaped.

• Observe the application: AC is commonly used fo...read more

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

DI stands for Ductile Iron and HDPE stands for High-Density Polyethylene, both used in water supply systems.

• DI pipes are made from ductile iron, known for strength and durability.

• HDPE pipes are made from high-density polyethylene, offering flexibility and resistance to corrosion.

• DI pipes are often used in municipal water supply systems due to their robustness.

• HDPE pipes are commonly used for underground water distribution due to their lightweight and ease of installation.

• Both...read more

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.

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

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