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I applied via Referral and was interviewed before Sep 2022. There were 2 interview rounds.
System studies involve analyzing and evaluating the performance of electrical systems to ensure efficiency and reliability.
System studies involve analyzing the behavior of electrical systems under different operating conditions.
They help identify potential issues and optimize the performance of the system.
Examples of system studies include load flow analysis, short circuit analysis, and protection coordination studies.
Load flow study is a method used in electrical engineering to analyze and calculate the flow of power in an electrical network.
Load flow study helps in determining the steady-state operating conditions of a power system.
It involves calculating the voltage magnitude and phase angle at each bus in the network.
The study considers factors like power generation, transmission line losses, and load demand.
It helps in identify...
MCB is a miniature circuit breaker used for low voltage applications, while MCCB is a molded case circuit breaker used for higher currents and voltages.
MCB is designed for low voltage applications, typically up to 1000V, while MCCB is designed for higher currents and voltages, typically up to 2500V.
MCB is usually thermal-magnetic in operation, while MCCB can be thermal-magnetic or electronic trip units.
MCB is compact i...
Different types of breakers include circuit breakers, fuse breakers, and ground fault circuit interrupters.
Circuit breakers: Automatically switch off electrical circuits during abnormal conditions.
Fuse breakers: Use a fuse to interrupt the circuit when overloaded.
Ground fault circuit interrupters (GFCI): Detect imbalances in current flow to prevent electrical shocks.
Miniature circuit breakers (MCB): Provide protection ...
posted on 30 Apr 2021
Lighting levels for indoor and outdoor areas are determined based on the purpose of the space and the activities that take place.
Indoor lighting levels are typically measured in foot-candles or lux
Outdoor lighting levels are typically measured in lumens per square meter
Calculation procedures involve determining the required illuminance level for the space and selecting appropriate light fixtures and bulbs
Factors such a...
Cable glands are used to secure and seal cables in various applications based on the area of installation.
Cable glands are used in hazardous areas to prevent the entry of flammable gases and liquids.
In outdoor applications, cable glands are used to protect cables from moisture and dust.
In industrial settings, cable glands are used to secure cables and prevent them from being pulled out.
Different types of cable glands a...
posted on 24 Oct 2024
Basic electronics and electrical questions
Topic is About GenC and GenX
I applied via Company Website and was interviewed before Dec 2022. There were 4 interview rounds.
I am an experienced Electrical Engineer with a passion for designing and implementing innovative solutions.
I have a strong background in electrical engineering, with a focus on power systems and control systems.
I have successfully designed and implemented electrical systems for various projects, including commercial buildings and industrial plants.
I am skilled in using CAD software for electrical design and have experi...
I can provide the required documents and discuss salary and joining details.
I can provide all necessary documents such as resume, certifications, and transcripts.
My current base salary is $X per year.
I expect a base salary in the range of $Y to $Z per year.
I am available to join within X weeks/months.
I can discuss further details during the interview.
posted on 16 Dec 2023
Load density refers to the amount of power consumed per unit area or volume.
Load density is typically measured in watts per square meter or watts per cubic meter.
It is used in electrical design to determine the distribution of power consumption in a given space.
Higher load density may require more robust electrical systems to handle the increased power demand.
For example, data centers have high load density due to the ...
Short circuit current from 1000kVA TF (5% Z) on a panel and determine its CB Fault current rating using IEC Standard.
Calculate the short circuit current using the formula: Short circuit current = 1000kVA / (1.732 * 5%)
Determine the CB Fault current rating based on the calculated short circuit current
Refer to IEC Standard for guidelines on short circuit current calculations and CB ratings
The cable size and circuit breaker rating for a 50KW motor at 30m distance from the panel depend on factors like voltage, current, and installation conditions.
Calculate the full load current (FLC) of the motor using the formula: FLC = (Power (kW) * 1000) / (sqrt(3) * Voltage)
Select a cable size based on the FLC, voltage drop considerations, and installation conditions
Choose a circuit breaker rating based on the FLC and...
CRI stands for Color Rendering Index, a measure of how accurately a light source illuminates colors compared to natural light.
CRI is a scale from 0 to 100, with higher values indicating better color rendering.
It is important in lighting design to ensure colors appear true and vibrant.
LED lights typically have high CRI values, making them popular for applications where color accuracy is crucial.
UGR stands for Unified Glare Rating, a measure of the discomfort glare perceived by an observer.
UGR is used in lighting design to evaluate the visual comfort of lighting installations.
It takes into account factors such as the luminance of the light source, the position of the observer, and the reflectance of the surrounding surfaces.
Lower UGR values indicate less glare and better visual comfort for the occupants.
For ex...
Uniformity factor is a measure of how evenly distributed light is in a given space.
Uniformity factor is calculated by dividing the minimum illuminance level by the average illuminance level in a space.
A higher uniformity factor indicates more even lighting distribution.
Uniformity factor is important in lighting design to ensure consistent lighting levels throughout a space.
For example, in an office setting, a uniformit
Maintenance factor is a multiplier used in lighting design to account for the decrease in light output over time due to dirt, aging, and other factors.
Maintenance factor is typically a value between 0 and 1, with 1 indicating no decrease in light output over time.
It is used to adjust the initial illuminance level calculated for a space to account for the decrease in light output over the life of the lighting system.
Fac...
Reflection index in rooms refers to the amount of sound reflected off surfaces within a room.
Reflection index is important in determining the acoustics of a room.
High reflection index can lead to echoes and reverberation.
Materials like concrete and glass have high reflection index, while soft materials like carpets and curtains have low reflection index.
Exit sign lighting in corridors or pathways is designed to provide clear and visible guidance to occupants in case of emergency.
Ensure exit signs are placed at all exits and change in direction
Use photoluminescent materials for backup in case of power failure
Provide adequate lighting levels to ensure visibility in all conditions
Consider using LED lights for energy efficiency and long lifespan
Earthing design involves creating a low-resistance path for fault currents to safely dissipate into the ground.
Determine the type of earthing system needed based on the specific requirements of the electrical installation.
Calculate the required size of the earthing conductors based on the fault current levels and soil resistivity.
Ensure proper bonding of all metallic structures and equipment to the earthing system to p...
Earth loop impedance is the total impedance of the earth fault current path in an electrical circuit.
Earth loop impedance is important for ensuring the safety of electrical installations.
It is measured in ohms and is used to calculate the maximum fault current that could flow in the event of a fault.
Low earth loop impedance is desirable as it helps to quickly trip circuit breakers in case of a fault.
It is influenced by...
Designing a transformer room involves considering safety, space requirements, ventilation, and electrical codes.
Ensure proper ventilation to prevent overheating of transformers
Follow electrical codes and regulations for clearances and access
Provide adequate space for maintenance and operation of transformers
Consider safety measures such as fire protection and emergency shutdown systems
Cable tray sizing involves considering the current carrying capacity, voltage drop, and environmental factors.
Calculate the total current carrying capacity required for the cables in the tray.
Consider the voltage drop limitations based on the distance and load.
Take into account the environmental factors such as temperature, humidity, and corrosive elements.
Select the appropriate size and material of the cable tray base...
Spacing between smoke detectors depends on the type of detector and the manufacturer's recommendations.
Spacing between smoke detectors is typically around 30 feet in residential areas.
For high ceilings, detectors may need to be spaced closer together.
Consult the manufacturer's guidelines for specific spacing requirements.
Clearance between cable tray and wet service pipe is maintained by using appropriate support systems and ensuring proper spacing.
Use support systems such as clamps, hangers, and brackets to secure the cable tray and wet service pipe at appropriate distances.
Ensure proper spacing between the cable tray and wet service pipe to prevent any contact or interference.
Follow industry standards and regulations for minimum clear...
Designing a CCTV system involves selecting appropriate cameras, DVR/NVR, and cables based on requirements.
Determine the coverage area and required resolution for each camera
Select suitable cameras (e.g. dome, bullet, PTZ) based on the environment
Choose a DVR/NVR with enough storage capacity and network connectivity
Use high-quality coaxial cables (e.g. RG59) for analog cameras or Ethernet cables for IP cameras
Consider u...
Harmonics in transformers are non-linear currents or voltages that can cause overheating, increased losses, and interference in electrical systems.
Harmonics are multiples of the fundamental frequency in the power system, typically caused by non-linear loads like variable frequency drives or rectifiers.
Impacts of harmonics include increased heating in transformers, higher losses, reduced power quality, and interference ...
posted on 13 Apr 2024
I applied via Walk-in and was interviewed before Apr 2023. There was 1 interview round.
I applied via Company Website and was interviewed in Apr 2023. There were 2 interview rounds.
Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points.
Ohm's law is represented by the equation I = V/R, where I is the current, V is the voltage, and R is the resistance.
It is named after Georg Simon Ohm, a German physicist who first formulated this law.
This law is applicable to all types of circuits, including DC and AC circuits.
It is use...
posted on 12 Oct 2024
I applied via Campus Placement and was interviewed in Sep 2024. There were 3 interview rounds.
General knowlegde, Basic Aptitude, Domain Technical MCQ
Genx vs Genz, Altitude and comparsion
Components of a transformer include core, windings, and insulation.
Core: Provides a path for magnetic flux
Windings: Primary and secondary coils for inducing voltage
Insulation: Prevents short circuits and ensures safety
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Electrical Engineer
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