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I applied via Campus Placement and was interviewed before Oct 2023. There were 3 interview rounds.
Basic high school level aptitude questions
I applied via Campus Placement and was interviewed before Feb 2021. There were 2 interview rounds.
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posted on 8 Jan 2015
Discussion on soil mechanics starting from modulus of elasticity to liquifaction
Modulus of elasticity is a measure of soil stiffness
Soil strength is important in determining its ability to withstand loads
Liquifaction occurs when soil loses strength and behaves like a liquid
Factors affecting soil strength include soil type, moisture content, and stress history
Liquifaction can lead to soil failure and damage to structure
posted on 20 Jul 2020
I applied via Referral and was interviewed before Jul 2019. There was 1 interview round.
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 si...
SMPS stands for Switched Mode Power Supply, which is an electronic power supply that uses a switching regulator to convert electrical power efficiently.
SMPS is commonly used in electronic devices such as computers, televisions, and mobile phones.
It uses a switching regulator to convert AC power to DC power.
SMPS is more efficient than traditional linear power supplies.
It can be designed to provide different output volta...
A rectifier is an electrical device that converts alternating current (AC) to direct current (DC).
Rectifiers are commonly used in power supplies and electronic devices.
They typically consist of diodes that allow current to flow in only one direction.
Rectifiers can be half-wave or full-wave, depending on the number of diodes used.
Examples of rectifiers include bridge rectifiers, vacuum tube rectifiers, and solid-state r
PAC stands for Programmable Automation Controller, a type of industrial control system used for automation and monitoring.
PACs are similar to PLCs but have more advanced capabilities such as data processing and communication.
They are used in various industries including manufacturing, energy, and transportation.
PACs can be programmed using various languages such as ladder logic, structured text, and C++.
Examples of PAC...
OTDR stands for Optical Time Domain Reflectometer. It is a device used to measure the characteristics of an optical fiber.
OTDR is commonly used in the telecommunications industry to troubleshoot and maintain fiber optic networks.
It sends a series of light pulses into the fiber and measures the time and intensity of the reflections to determine the length, loss, and quality of the fiber.
OTDR can locate faults, such as b...
LSPM stands for Local Service Provider Management.
LSPM is a system or process used to manage and coordinate local service providers.
It involves selecting, contracting, and overseeing the performance of local service providers.
LSPM ensures that local service providers meet the required standards and deliver quality services.
Examples of local service providers include contractors, vendors, and suppliers.
LSPM helps in opt...
Soil types can vary greatly and are classified based on their composition, texture, and fertility.
Soil types include clay, silt, sand, loam, and peat.
Clay soil is heavy and retains water, while sandy soil is loose and drains quickly.
Loam soil is a balanced mixture of clay, silt, and sand, ideal for plant growth.
Soil fertility is determined by its nutrient content and organic matter.
Different soil types require differen...
I applied via Calling and was interviewed in Sep 2021. There was 1 interview round.
I applied via Recruitment Consultant and was interviewed in Dec 2021. There was 1 interview round.
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 tr...
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 g...
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.
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 ...
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 ...
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...
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 primar...
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 p...
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 conducto...
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...
posted on 3 Mar 2024
I applied via Approached by Company
Transformer works on the principle of electromagnetic induction to transfer electrical energy between two or more circuits.
Transformers have two coils of wire, known as primary and secondary coils.
When an alternating current flows through the primary coil, it creates a changing magnetic field.
This changing magnetic field induces a voltage in the secondary coil, transferring electrical energy.
Transformers are used to st...
posted on 14 May 2024
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