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SHYAM METALICS AND ENERGY
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I applied via AmbitionBox and was interviewed in Dec 2024. There were 5 interview rounds.
An overload relay works by monitoring the current flowing through a motor and tripping when the current exceeds a set limit.
Monitors the current flowing through a motor
Trips and interrupts power when current exceeds a set limit
Protects the motor from damage due to overloading
Can be reset manually after tripping
Insulation resistance is measured using a megohmmeter to apply a high voltage and measure the resistance of the insulation material.
Use a megohmmeter to apply a high voltage to the insulation material
Measure the resistance of the insulation material to determine its insulation resistance
Insulation resistance is typically measured in megaohms (MΩ)
Regular insulation resistance testing helps prevent electrical failures an
Electrical safety can be ensured by following proper procedures, using appropriate equipment, and staying vigilant.
Always use insulated tools when working on live circuits
Ensure circuits are de-energized before working on them
Wear appropriate personal protective equipment (PPE) such as gloves and goggles
Regularly inspect and maintain electrical equipment to prevent malfunctions
Follow safety guidelines and procedures ou
Preventive maintenance on a motor involves inspecting, cleaning, lubricating, and testing the motor to ensure optimal performance and prevent breakdowns.
Inspect the motor for any signs of wear or damage
Clean the motor and its components to remove dirt and debris
Lubricate moving parts to reduce friction and wear
Test the motor's performance using appropriate tools and equipment
Replace any worn out parts or components as
To succeed in an interview, it is important to prepare thoroughly, practice common interview questions, research the company, dress professionally, and demonstrate enthusiasm and confidence.
Thoroughly research the company and the position you are applying for
Practice common interview questions and prepare examples of your skills and experiences
Dress professionally and appropriately for the interview
Demonstrate enthusia...
A star-delta starter is used to reduce the starting current of a motor by initially connecting the motor windings in a star configuration and then switching to a delta configuration.
The motor windings are initially connected in a star configuration during starting to reduce the starting current.
After a certain period, the windings are switched to a delta configuration to achieve full speed and torque.
This transition fr...
Undervoltage faults occur when the voltage in a system drops below the normal operating level, leading to potential equipment damage or malfunction.
Undervoltage faults can be caused by issues such as power supply fluctuations, equipment failures, or overloaded circuits.
These faults can lead to equipment damage, reduced efficiency, or complete shutdown of systems.
Examples include a power surge causing a drop in voltage,...
Overvoltage faults are electrical faults that occur when the voltage in a circuit exceeds the normal operating range.
Overvoltage faults can damage electrical components and equipment.
They can be caused by lightning strikes, power surges, or faulty equipment.
Protective devices like surge protectors and voltage regulators can help prevent overvoltage faults.
Examples include a power surge from a lightning strike damaging ...
A thermal relay is used to protect electrical circuits from overloads by monitoring the temperature of the circuit and tripping when it exceeds a certain threshold.
Monitors the temperature of the electrical circuit
Trips and disconnects the circuit when temperature exceeds a set limit
Protects against overloads and overheating
Commonly used in motor protection applications
An RDOL starter is a type of reduced voltage starter used in electrical systems to reduce the starting current and torque of a motor.
RDOL stands for Reduced Direct Online starter.
It is used to start induction motors in a controlled manner.
RDOL starters reduce the voltage supplied to the motor during starting to limit the inrush current.
This helps in reducing mechanical stress on the motor and connected equipment.
Common...
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posted on 28 Aug 2024
I was interviewed in Jul 2024.
Transformer is a static device is change is ac voltage one level and another level but no change in frequency the work in mutual induction method.
Sailent type rotor and cylinder type rotor of uses in syuchronus machine.
I applied via Naukri.com and was interviewed in Mar 2024. There were 3 interview rounds.
Transformers, motors, generators, and electric generation are essential components in electrical systems.
Transformers are devices that transfer electrical energy between two or more circuits through electromagnetic induction.
Motors convert electrical energy into mechanical energy to drive machinery.
Generators convert mechanical energy into electrical energy.
Electric generation involves the process of producing electric...
DC motors are electric motors that operate using direct current (DC) power sources.
DC motors convert electrical energy into mechanical energy through the interaction of magnetic fields.
They are commonly used in appliances, power tools, and electric vehicles.
DC motors have two main types: brushed DC motors and brushless DC motors.
Brushed DC motors use brushes to conduct current, while brushless DC motors use electronic ...
Number System, coding and decoding, Analogies
Nodal analysis is a method used in electrical engineering to determine the voltage at each node in a circuit.
Nodal analysis involves writing Kirchhoff's Current Law equations for each node in a circuit.
It is used to analyze complex circuits with multiple nodes and voltage sources.
The goal of nodal analysis is to determine the voltage at each node relative to a reference point, usually ground.
It is a powerful tool for s...
A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.
Consists of two coils of wire, known as primary and secondary coils
Primary coil receives electrical energy and creates a magnetic field
Magnetic field induces a voltage in the secondary coil, transferring energy
Used to step up or step down voltage levels in power distribution systems
Commo...
I was interviewed in Jan 2024.
Power factor is the ratio of real power to apparent power in an AC circuit. VFD stands for Variable Frequency Drive. AC motors run on alternating current while DC motors run on direct current.
Power factor is a measure of how effectively electrical power is being used in a circuit.
It is calculated by dividing the real power (in watts) by the apparent power (in volt-amperes).
A power factor of 1 indicates that all the pow...
Types of load cells include strain gauge load cells, hydraulic load cells, and capacitive load cells.
Strain gauge load cells measure the strain or deformation of a material.
Hydraulic load cells use hydraulic fluid to measure force.
Capacitive load cells measure changes in capacitance to determine force.
Other types of load cells include piezoelectric load cells and pneumatic load cells.
I applied via campus placement at Sanjay Gandhi Polytechnic, Bellary and was interviewed in Sep 2023. There were 2 interview rounds.
posted on 30 Nov 2023
I applied via Naukri.com and was interviewed in May 2023. There was 1 interview round.
Different types of protection are used in a substation to ensure safety and reliability.
Overcurrent protection: Protects against excessive current flow.
Overvoltage protection: Safeguards against high voltage surges.
Differential protection: Detects faults by comparing currents entering and leaving the substation.
Distance protection: Protects transmission lines based on the distance to the fault.
Ground fault protection: ...
Different types of HT breakers are used in HT lines depending on the specific requirements.
Air Circuit Breaker (ACB) is commonly used in HT lines for its high breaking capacity and quick response time.
Vacuum Circuit Breaker (VCB) is another popular choice due to its compact size and low maintenance requirements.
SF6 Circuit Breaker is used for high voltage applications as it provides excellent arc quenching properties.
O...
posted on 16 Dec 2023
I applied via Walk-in and was interviewed before Dec 2022. There were 3 interview rounds.
posted on 9 Nov 2021
I applied via Walk-in and was interviewed in Oct 2021. There was 1 interview round.
Power transmission line is a system of structures, wires, and insulators that transmit electrical energy from a power plant to a substation.
Power transmission lines are used to transmit high voltage electricity over long distances.
They are made up of towers or poles that support the wires and insulators.
The wires are usually made of aluminum or copper and are insulated to prevent electrical leakage.
Power transmission l...
A power plant is a facility that generates electricity by converting various forms of energy into electrical energy.
Power plants can use various sources of energy such as coal, natural gas, nuclear, hydro, wind, and solar power.
The energy is converted into electrical energy through generators.
Power plants are essential for providing electricity to homes, businesses, and industries.
They can be classified into thermal, h...
Current is the flow of electric charge through a conductor.
Current is measured in amperes (A)
It is the rate of flow of electric charge
Current flows from high potential to low potential
It is the product of voltage and resistance (Ohm's law)
Voltage is the measure of electric potential difference between two points in a circuit.
Voltage is measured in volts (V)
It is the force that drives electric current through a circuit
Higher voltage means more energy is available to move electrons
Voltage can be either AC (alternating current) or DC (direct current)
Examples of voltage sources include batteries, generators, and power supplies
Ampere is the unit of electric current in the International System of Units (SI).
Ampere is named after the French physicist Andre-Marie Ampere.
It is defined as the amount of electric charge that flows through a conductor in one second when there is a constant potential difference of one volt across the conductor.
It is represented by the symbol 'A'.
Ampere is used to measure the flow of electric current in a circuit.
It i...
AC current is a type of electrical current that periodically reverses direction.
AC stands for alternating current
It is commonly used in household electrical systems
AC current changes direction 50-60 times per second
It is generated by power stations and distributed through power lines
AC current is measured in units of hertz (Hz)
DC current is the flow of electric charge in a constant direction.
DC stands for Direct Current
It is produced by sources such as batteries, generators, and solar cells
DC current flows in a single direction
It is used in electronic devices such as computers, televisions, and radios
Alternating current (AC) is an electrical current that periodically reverses direction.
AC is used to transmit power over long distances
It is generated by power stations and used in homes and businesses
AC voltage can be easily changed using transformers
AC is measured in cycles per second, or Hertz (Hz)
11kV current is the electrical current that flows through a circuit with a voltage of 11,000 volts.
11kV current is typically used in high voltage power transmission and distribution systems.
It is important to handle 11kV current with caution as it can be dangerous and potentially lethal.
The amount of current that flows through an 11kV circuit depends on the resistance of the circuit and the voltage applied.
In order to ...
posted on 30 Dec 2021
I applied via Shine and was interviewed in Dec 2021. There was 1 interview round.
A transformer is an electrical device that transfers electrical energy between two or more circuits through electromagnetic induction.
Transformers are used to increase or decrease the voltage of an alternating current (AC) signal.
They consist of two or more coils of wire, known as windings, that are wound around a core made of magnetic material.
The primary winding receives electrical energy from a power source, while t...
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