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I applied via campus placement at Vishwakarma Government Engineering College, Ahmedabad and was interviewed in Jan 2024. There were 2 interview rounds.
A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction. A motor is a machine that converts electrical energy into mechanical energy. Motor slip is the difference between the synchronous speed and the actual speed of the motor. Synchronous speed (Ns) is the speed at which the rotating magnetic field of the motor is in synchronism with the fre...
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posted on 6 Aug 2022
I was interviewed in Jul 2022.
60 percent core and 40 percent aptitude
Tests done on a transformer include insulation resistance test, turns ratio test, winding resistance test, and load test.
Insulation resistance test checks the insulation resistance between windings and between windings and ground.
Turns ratio test measures the ratio of the number of turns in the primary winding to the number of turns in the secondary winding.
Winding resistance test measures the resistance of each windin...
CT and PT are used in electrical systems for measurement and protection purposes.
CT (Current Transformer) is used to measure high currents and step them down to a manageable level for measurement and protection devices.
PT (Potential Transformer) is used to measure high voltages and step them down to a safe level for measurement and protection devices.
CTs and PTs provide isolation and safety by separating the high volta...
The generation voltage in India varies depending on the location and power plant.
The voltage ranges from 110V to 440V depending on the location.
The power plants generate electricity at different voltages.
The national grid operates at a voltage of 400kV and 765kV.
India has a mix of AC and DC power transmission systems.
High voltage is used for transmission to reduce power loss and increase efficiency.
High voltage reduces the current required for a given amount of power, which reduces power loss due to resistance in the transmission lines.
Lower current also means smaller conductors can be used, reducing material and installation costs.
High voltage transmission is more efficient over long distances, reducing the need for additional pow...
Renewable energy power plants are generally cheaper to install than traditional fossil fuel power plants.
Renewable energy power plants such as solar, wind, and hydroelectric are cheaper to install than traditional fossil fuel power plants.
The cost of installation for renewable energy power plants has decreased significantly in recent years due to advancements in technology and increased demand.
Fossil fuel power plants ...
OC test is done on LV side to avoid high voltage on secondary side. SC test is done on HV side to avoid high current on primary side.
LV side has lower voltage rating, hence safer for OC test
HV side has higher current rating, hence suitable for SC test
OC test checks insulation resistance and winding resistance
SC test checks impedance and voltage regulation
Example: A 100 MVA transformer with 220 kV HV and 33 kV LV rating
posted on 29 Apr 2024
I applied via Campus Placement and was interviewed in Oct 2023. There were 5 interview rounds.
It was general aptitude, all the questions were about the fundamental of engineering.
Group discussion was conducted for the candidates who were not in the top 10 of the 1st round aptitude. prepare for the general topics, more than knowledge about the topics your communication is very much important.
posted on 4 Apr 2023
Basics questions related to their department.
posted on 19 May 2017
Answers to questions related to induction machine and power transmission
Induction machine works on the principle of electromagnetic induction
Flux is induced in the rotor of the induction machine due to the rotating magnetic field produced by the stator
Infinite bus is a hypothetical bus with infinite power capacity and voltage
If load is suddenly changed in infinite bus, the voltage and frequency will change
High voltage ...
posted on 6 Aug 2022
I was interviewed in Jul 2022.
60 percent core and 40 percent aptitude
Tests done on a transformer include insulation resistance test, turns ratio test, winding resistance test, and load test.
Insulation resistance test checks the insulation resistance between windings and between windings and ground.
Turns ratio test measures the ratio of the number of turns in the primary winding to the number of turns in the secondary winding.
Winding resistance test measures the resistance of each windin...
CT and PT are used in electrical systems for measurement and protection purposes.
CT (Current Transformer) is used to measure high currents and step them down to a manageable level for measurement and protection devices.
PT (Potential Transformer) is used to measure high voltages and step them down to a safe level for measurement and protection devices.
CTs and PTs provide isolation and safety by separating the high volta...
The generation voltage in India varies depending on the location and power plant.
The voltage ranges from 110V to 440V depending on the location.
The power plants generate electricity at different voltages.
The national grid operates at a voltage of 400kV and 765kV.
India has a mix of AC and DC power transmission systems.
High voltage is used for transmission to reduce power loss and increase efficiency.
High voltage reduces the current required for a given amount of power, which reduces power loss due to resistance in the transmission lines.
Lower current also means smaller conductors can be used, reducing material and installation costs.
High voltage transmission is more efficient over long distances, reducing the need for additional pow...
Renewable energy power plants are generally cheaper to install than traditional fossil fuel power plants.
Renewable energy power plants such as solar, wind, and hydroelectric are cheaper to install than traditional fossil fuel power plants.
The cost of installation for renewable energy power plants has decreased significantly in recent years due to advancements in technology and increased demand.
Fossil fuel power plants ...
OC test is done on LV side to avoid high voltage on secondary side. SC test is done on HV side to avoid high current on primary side.
LV side has lower voltage rating, hence safer for OC test
HV side has higher current rating, hence suitable for SC test
OC test checks insulation resistance and winding resistance
SC test checks impedance and voltage regulation
Example: A 100 MVA transformer with 220 kV HV and 33 kV LV rating
posted on 22 Mar 2023
I applied via campus placement at KDK College of Engineering, Nagpur and was interviewed in Feb 2023. There were 4 interview rounds.
They had given the topic and asked to speak on it for 1 minute.
posted on 29 Jan 2022
I applied via Naukri.com and was interviewed in Dec 2021. There were 2 interview rounds.
Aptitude test along with core(materials)
posted on 14 Mar 2023
I applied via Campus Placement and was interviewed in Feb 2023. There were 2 interview rounds.
Basic Core Question
Numerical based and logic based question
Topic was Air pollution prevention methods in urban area
posted on 2 Mar 2022
I applied via Campus Placement and was interviewed in Feb 2022. There were 5 interview rounds.
Prepare basics of your engineering Production, Automobile, Thermal, Aptitude, Reasoning.
Depend on the HR
Rankine cycle is a thermodynamic cycle used in power plants to convert heat energy into mechanical work.
Rankine cycle is a vapor power cycle.
It consists of four processes: heating, vaporization, expansion, and condensation.
The cycle uses a working fluid, typically water, to transfer heat from a heat source to a heat sink.
The working fluid is pumped to a boiler where it is heated and vaporized.
The high-pressure vapor is...
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