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I appeared for an interview in Feb 2025, where I was asked the following questions.
Star and Delta are two configurations for connecting three-phase electrical systems, affecting voltage and current characteristics.
Star (Y) connection has one end of each phase connected to a common point, reducing voltage across each phase.
Delta (Δ) connection connects the end of each phase to the start of the next, allowing for higher voltage across each phase.
In Star connection, line voltage is √3 times the phase vo...
I applied via Campus Placement and was interviewed in Sep 2023. There were 2 interview rounds.
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I applied via Naukri.com and was interviewed before Mar 2021. There were 3 interview rounds.
The question is asking for knowledge about all types of electrical systems.
Knowledge of different types of electrical systems such as AC, DC, single-phase, three-phase, etc.
Understanding of electrical components and their functions, such as resistors, capacitors, transformers, etc.
Familiarity with electrical codes and regulations.
Ability to read and interpret electrical schematics and diagrams.
Troubleshooting skills to...
posted on 19 Nov 2020
I applied via Recruitment Consultant
posted on 24 May 2024
I applied via Walk-in and was interviewed in Apr 2024. There was 1 interview round.
I applied via Approached by Company and was interviewed in Mar 2024. There was 1 interview round.
A conductor is a material that allows the flow of electric current.
Conductors have low resistance to the flow of electricity.
Metals like copper and aluminum are commonly used as conductors.
Conductors are used in electrical wiring, circuits, and transmission lines.
A semiconductor is a material that has electrical conductivity between that of a conductor and an insulator.
Semiconductors have a band gap that allows them to conduct electricity under certain conditions.
Common semiconductor materials include silicon, germanium, and gallium arsenide.
Semiconductors are used in electronic devices such as transistors, diodes, and integrated circuits.
The electrical resistance is a measure of how much an object opposes the flow of electric current.
Electrical resistance is measured in ohms (Ω).
It is determined by the material and dimensions of an object.
Higher resistance means less current flow.
Example: A light bulb has a high resistance, which causes it to glow when current passes through.
I applied via Company Website and was interviewed in Nov 2022. There were 2 interview rounds.
Maintenance of a captive power plant involves regular checks and upkeep to ensure efficient and safe operation.
Regular inspection of equipment and machinery
Scheduled maintenance of generators, transformers, and switchgear
Testing and calibration of control systems
Cleaning and lubrication of moving parts
Replacement of worn or damaged components
Ensuring compliance with safety regulations
Training of personnel on proper ope
Maintenance of transformer involves regular inspection, testing, and servicing to ensure its proper functioning.
Regular inspection of transformer components such as bushings, tap changers, and cooling system
Testing of transformer oil for dielectric strength and moisture content
Servicing of transformer by cleaning, tightening connections, and replacing faulty components
Ensuring proper ventilation and cooling of transfor...
posted on 12 Apr 2023
I applied via AmbitionBox and was interviewed in Aug 2023. There were 3 interview rounds.
A 3 phase transformer is a type of transformer that is designed to handle three-phase power distribution systems.
Consists of three sets of primary and secondary windings
Used in power distribution systems to step up or step down voltage in three-phase circuits
Commonly used in industrial and commercial applications
Examples include distribution transformers, power transformers, and autotransformers
A 3 phase transformer is a type of transformer that is designed to handle three-phase power distribution systems.
Consists of three sets of primary and secondary windings
Used in power distribution systems to step up or step down voltage in three-phase circuits
Commonly used in industrial and commercial applications
Examples include distribution transformers, power transformers, and autotransformers
A 2 phase transformer is a type of transformer that has two primary and two secondary windings.
Consists of two primary windings and two secondary windings
Used in certain industrial applications where a 3 phase transformer is not feasible
Less common compared to single phase and 3 phase transformers
Kirchhoff's current law states that the total current entering a junction is equal to the total current leaving the junction.
Total current entering a junction = Total current leaving the junction
It is based on the principle of conservation of charge
Used to analyze and solve electrical circuits
A semiconductor is a material that has electrical conductivity between a conductor and an insulator.
Semiconductors have a conductivity between that of a conductor and an insulator
They are used in electronic devices such as transistors, diodes, and integrated circuits
Common semiconductor materials include silicon, germanium, and gallium arsenide
Ohm's Law states that the current flowing through a conductor is directly proportional to the voltage applied across it, and inversely proportional to the resistance of the conductor.
Current (I) = Voltage (V) / Resistance (R)
It helps in calculating the current flowing through a circuit based on the voltage and resistance values.
It is represented by the formula I = V/R.
Ohm's Law is fundamental in understanding and analy
Interest in electrical equipment skill skill development engineer
Diploma in electrical engineering in Gumla polytechnic Gumla Jharkhand
Mechanical energy to electrical energy convert in electrical machine and power system is a generation transmission and distribution of electrical energy
Transformers work on the principle of electromagnetic induction to transfer electrical energy between two or more circuits.
Transformers consist of two or more coils of wire called windings.
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 the primary winding, it creates a changing magnetic field.
This changing...
Motor working principle
A motor converts electrical energy into mechanical energy
It operates on the principle of electromagnetic induction
When current flows through a coil in a magnetic field, a force is generated, causing the coil to rotate
This rotation is transferred to the motor shaft, resulting in mechanical motion
Different types of motors include DC motors, AC motors, and stepper motors
The type of motor can be AC or DC, while the type of transformer can be step-up or step-down.
AC motors are commonly used in household appliances and industrial machinery.
DC motors are often used in electric vehicles and robotics.
Step-up transformers increase voltage while step-down transformers decrease voltage.
Transformers are used in power distribution systems to transfer electrical energy between different voltage l
A circuit breaker is an electrical switch designed to protect an electrical circuit from damage caused by excess current.
It automatically interrupts the flow of electricity when a fault is detected.
It prevents damage to electrical equipment and reduces the risk of fire.
Circuit breakers can be reset after tripping, unlike fuses which need to be replaced.
They are commonly used in residential, commercial, and industrial a...
There are three types of circuits: series, parallel, and combination.
Series circuit: components are connected in a single path, current is the same throughout, voltage divides across components.
Parallel circuit: components are connected in multiple paths, voltage is the same across components, current divides across paths.
Combination circuit: a mix of series and parallel circuits, components are connected in both serie
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.
CT and PT are commonly used in power systems for protection, metering, and control purposes.
CTs and PTs are typically connected to instruments, relays, or meters to provide accurat...
A register is a small amount of fast memory located within a computer's CPU.
Registers store data that the CPU needs to access quickly.
They are used to hold instructions, data, and addresses during the execution of a program.
Registers are faster to access than main memory, allowing for faster processing.
Examples of registers include the program counter, instruction register, and general-purpose registers.
A turbine is a device that converts the energy from a fluid flow into useful work.
Turbines are commonly used in power generation to convert the energy of steam, water, or gas into mechanical energy.
They consist of a rotor with blades that are driven by the fluid flow, causing the rotor to rotate.
The rotation of the rotor can be used to generate electricity or perform other types of work.
Different types of turbines incl...
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