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3 phase power has three conductors carrying three alternating currents, while 1 phase power has only one conductor carrying one alternating current.
3 phase power is more efficient for high power applications
1 phase power is commonly used in residential buildings
3 phase power provides a more balanced power supply compared to 1 phase power
kW is a unit of real power while kVA is a unit of apparent power in electrical engineering.
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 difference between kW and kVA is due to the presence of reactive power in the system.
In an ideal system with unit...
Transformer works on the principle of electromagnetic induction to transfer electrical energy between two or more circuits.
Transformers consist of two coils of wire, known as the primary and secondary coils.
When an alternating current flows through the primary coil, it creates a changing magnetic field around it.
This changing magnetic field induces a voltage in the secondary coil, transferring electrical energy between...
Types of AC motors include induction motors, synchronous motors, and brushed and brushless DC motors.
Induction motors: most commonly used type, simple design, reliable, low cost
Synchronous motors: maintain constant speed, used in applications requiring precise speed control
Brushed DC motors: use brushes to conduct current, simple design, easy to control speed
Brushless DC motors: more efficient, longer lifespan, no brus
posted on 11 Oct 2020
I applied via Naukri.com and was interviewed in Sep 2020. There was 1 interview round.
I applied via Walk-in and was interviewed in Jul 2021. There was 1 interview round.
Basic appti ques were asked
Transformer types include step-up, step-down, isolation, autotransformer, and instrument transformer.
Step-up transformer increases voltage while decreasing current
Step-down transformer decreases voltage while increasing current
Isolation transformer separates primary and secondary windings
Autotransformer has a single winding with multiple taps for voltage adjustment
Instrument transformer is used for measuring current or
Motors are devices that convert electrical energy into mechanical energy. There are various types of motors.
DC motors: used in appliances, toys, and automobiles
AC motors: used in industrial machinery and household appliances
Stepper motors: used in robotics and automation
Servo motors: used in precision control applications
Brushless motors: used in drones and electric vehicles
posted on 17 Feb 2023
I applied via Other and was interviewed in Apr 2020. There were 4 interview rounds.
I applied via Job Fair
There are three types of heat transfer: conduction, convection, and radiation.
Conduction is the transfer of heat through direct contact between objects or substances.
Convection is the transfer of heat through the movement of fluids or gases.
Radiation is the transfer of heat through electromagnetic waves, such as from the sun.
I applied via Job Fair and was interviewed in Sep 2021. There were 2 interview rounds.
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