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A transformer is a 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 in power distribution, voltage regulation, and electrical isolation
I applied via Company Website and was interviewed before Jan 2023. There was 1 interview round.
The question is asking about the current of a unit.
The current of a unit refers to the amount of electric current flowing through a specific unit or device.
It is typically measured in amperes (A) or milliamperes (mA).
The current of a unit can vary depending on the specific device or circuit being discussed.
For example, the current of a unit could refer to the current flowing through a resistor, a transistor, or a motor...
Transformers are rated in KVA (kilovolt-amperes) to indicate their power capacity.
KVA stands for kilovolt-amperes, which is a unit of apparent power.
The KVA rating of a transformer indicates the maximum amount of power it can handle.
Transformers are available in various KVA ratings to suit different power requirements.
Higher KVA ratings indicate higher power capacity.
For example, a transformer with a 100 KVA rating can
Loop law, also known as Kirchhoff's voltage law, states that the sum of the voltages in any closed loop in a circuit is zero.
Loop law is a fundamental principle in electrical engineering.
It is also known as Kirchhoff's voltage law (KVL).
According to loop law, the algebraic sum of the potential differences (voltages) around any closed loop in a circuit is always zero.
It is based on the principle of conservation of energ...
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 in an electrical circuit.
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 the secondary ...
A rectifier is an electrical device that converts alternating current (AC) to direct current (DC).
Rectifiers are commonly used in power supplies to convert AC voltage to DC voltage.
They are made up of diodes, which 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 soli
I applied via Walk-in and was interviewed before Apr 2021. There were 2 interview rounds.
Dhoot Transmission interview questions for designations
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I applied via Walk-in and was interviewed before Feb 2023. There was 1 interview round.
I applied via Company Website and was interviewed in Sep 2021. There were 3 interview rounds.
I applied via Naukri.com and was interviewed in Sep 2020. There were 3 interview rounds.
Wind turbines operate by converting the kinetic energy of wind into mechanical power, which is then converted into electricity.
Wind turns the blades of the turbine, causing them to spin
The spinning blades turn a shaft connected to a generator
The generator converts the mechanical energy into electrical energy
The electricity is then sent to the power grid for distribution
Wind speed and direction are monitored to optimize
I applied via Naukri.com and was interviewed in Dec 2020. There were 4 interview rounds.
VCB, SF6, CT, PT, LA are all electrical equipment used in power systems.
VCB stands for Vacuum Circuit Breaker and is used for switching and protection of electrical power systems.
SF6 is a gas used as an insulating medium in high voltage electrical equipment such as circuit breakers, switchgear, and transformers.
CT stands for Current Transformer and is used to measure electrical current in power systems.
PT stands for Po...
Copper and aluminum are commonly used conductors in transmission.
Copper is an excellent conductor due to its high electrical conductivity.
Aluminum is also widely used as it is lightweight and cost-effective.
Other conductors like silver and gold are rarely used due to their high cost.
Copper-clad steel conductors are used in specific applications where strength is required.
Different types of tests related to transformers include routine tests, type tests, and special tests.
Routine tests are performed on every transformer and include measurement of winding resistance, insulation resistance, and voltage ratio.
Type tests are performed on a sample transformer to verify its design and include temperature rise test, impulse test, and short-circuit test.
Special tests are performed on transforme...
Different types of faults refer to the various abnormalities that can occur in an electrical system.
Short circuit fault
Open circuit fault
Ground fault
Overvoltage fault
Undervoltage fault
Overcurrent fault
Undercurrent fault
Relays are switches that open and close circuits electromechanically or electronically. There are various types of relays.
Electromechanical relays
Solid-state relays
Reed relays
Polarized relays
Time-delay relays
Overload protection relays
Mercury-wetted relays
Latching relays
Machine tool relays
Thermal relays
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