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Oil in transformers is used for cooling and insulation purposes.
Oil helps in dissipating heat generated in the transformer
It also provides insulation to prevent electrical breakdown
Mineral oil is commonly used in transformers for its dielectric properties
Water has poor dielectric properties and can cause electrical failures in transformers.
Water has poor dielectric properties, which can lead to electrical failures in transformers.
Water can cause corrosion and rusting of transformer components.
Water can also lead to insulation breakdown and reduced efficiency of the transformer.
Mineral oil or synthetic esters are commonly used for transformer cooling due to their better
Generator terminal voltage in a 210 MW unit is typically around 20-24 kV.
Generator terminal voltage is usually maintained within a specific range to ensure proper functioning of the unit
The voltage can vary based on the specific design and configuration of the generator
In a 210 MW unit, the terminal voltage is typically around 20-24 kV
Induction motors are commonly used in thermal power plants.
Induction motors are preferred due to their simplicity, reliability, and low cost.
They are used for driving pumps, fans, compressors, and other auxiliary equipment in thermal power plants.
Synchronous motors are also used for applications requiring precise speed control.
DC motors may be used in some specific cases where variable speed control is needed.
Major motors in a thermal power plant include boiler feed pump motor, forced draft fan motor, induced draft fan motor, and condensate extraction pump motor.
Boiler feed pump motor: used to pump feedwater into a boiler
Forced draft fan motor: used to supply air to the furnace for combustion
Induced draft fan motor: used to remove flue gases from the furnace
Condensate extraction pump motor: used to extract condensate from t
I applied via Recruitment Consultant and was interviewed in Dec 2021. There was 1 interview round.
NF and 2NF are normal forms in database design. Cookies are small text files stored on a user's device. Digital signature and SSL are security measures for online communication.
NF stands for Normal Form and is used in database design to ensure data is organized and free of redundancy.
2NF is a higher level of normalization that ensures each non-key attribute is dependent on the entire primary key.
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I applied via Walk-in and was interviewed in Jan 2022. There were 2 interview rounds.
Generators convert mechanical energy into electrical energy, while motors convert electrical energy into mechanical energy. Transformers transfer electrical energy from one circuit to another.
Generators use Faraday's law of electromagnetic induction to produce electrical energy
AC motors work on the principle of rotating magnetic fields
DC motors use commutators to convert AC to DC and produce a constant magnetic field
Tr...
IGBT, SCR, BJT are electronic devices used in power electronics for various applications.
IGBT (Insulated Gate Bipolar Transistor) is used as a switch in power electronics applications such as motor drives, inverters, and power supplies.
SCR (Silicon Controlled Rectifier) is used for controlling high power AC circuits, such as in lighting control, motor control, and heating control.
BJT (Bipolar Junction Transistor) is us...
I applied via Referral and was interviewed before Oct 2022. There were 4 interview rounds.
Basic electrical, technical relqted questions
I applied via Campus Placement
IGBT is a power semiconductor device used for switching applications in power electronics.
IGBT combines the advantages of MOSFET and BJT transistors
It has high input impedance like a MOSFET and low on-state voltage drop like a BJT
Used in applications like motor drives, inverters, and power supplies
Power electronics devices are electronic components used to control and convert electrical power.
Power diodes: used for rectification in power supplies
Thyristors: used for switching and control in high power applications
Power transistors: used for amplification and switching in power circuits
IGBTs (Insulated Gate Bipolar Transistors): used in high power applications like motor drives
MOSFETs (Metal-Oxide-Semiconductor F...
I am a recent graduate with a degree in engineering and a passion for problem-solving and innovation.
Recent graduate with a degree in engineering
Passionate about problem-solving and innovation
Strong communication and teamwork skills
Experience with technical projects and internships
In two years, I see myself taking on more responsibilities and contributing significantly to the team's projects.
Continuing to learn and grow in my role as an Assistant Engineer
Taking on more complex projects and tasks
Building strong relationships with colleagues and stakeholders
Possibly pursuing further education or certifications to enhance my skills
Seeking opportunities for advancement within the company
I appeared for an interview in Feb 2021.
posted on 19 Mar 2024
I applied via Recruitment Consulltant and was interviewed in Sep 2023. There was 1 interview round.
kW measures real power while kVA measures apparent power in an electrical system.
kW stands for kilowatts and represents the actual power consumed by a device or system.
kVA stands for kilovolt-amperes and represents the total power in an electrical system, including both real and reactive power.
The power factor (PF) is the ratio of real power (kW) to apparent power (kVA) in a system.
kW is used to determine the actual en...
Transformers are electrical devices that transfer electrical energy between two or more circuits through electromagnetic induction.
Transformers consist of two coils of wire, known as the primary and secondary coils.
They work on the principle of electromagnetic induction, where a changing current in the primary coil induces a voltage in the secondary coil.
Transformers are used to step up or step down voltage levels in e...
The standard of maintaining refers to the level of quality and consistency in upkeep and repair of equipment or systems.
Regular inspections and preventative maintenance are essential
Documentation of maintenance activities should be kept
Adherence to manufacturer's guidelines and industry standards is important
Proper training and certification of maintenance personnel is necessary
The minimum requirements for employees standard vary depending on the industry and job position.
Minimum age requirement
Education and certification
Experience and skills
Physical and mental fitness
Background check and drug test
Language proficiency
Work authorization
Compliance with company policies and regulations
I applied via Referral and was interviewed before Mar 2021. There were 2 interview rounds.
I appeared for an interview in Sep 2020.
based on 1 interview
Interview experience
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