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I applied via Recruitment Consulltant and was interviewed in Apr 2022. There were 3 interview rounds.
VFD stands for Variable Frequency Drive and is used to control the speed of an electric motor. PLC stands for Programmable Logic Controller and is used to automate industrial processes.
VFD is used to vary the frequency and voltage supplied to an electric motor, allowing for precise control of its speed.
PLC is a digital computer used to automate industrial processes, such as controlling machinery on a factory assembly l...
I applied via Company Website and was interviewed before Feb 2021. There was 1 interview round.
Qcon interview questions for designations
posted on 11 Mar 2022
I applied via Approached by Company and was interviewed before Mar 2021. There were 2 interview rounds.
CB operation and use refers to the operation and use of circuit breakers in electrical systems.
CBs are used to protect electrical systems from overloads and short circuits.
They work by interrupting the flow of current when a fault is detected.
CBs can be manually or automatically operated.
They come in different types, such as air, oil, vacuum, and SF6 CBs.
CBs are commonly used in residential, commercial, and industrial
Single phase and three phase are two types of electrical power distribution systems.
Single phase has one live conductor and one neutral conductor, while three phase has three live conductors and one neutral conductor.
Single phase is commonly used in residential and small commercial applications, while three phase is used in industrial and large commercial applications.
Single phase power supply is suitable for low power...
R, Y, B phases are the three phases of AC power supply. They differ in their phase angle and voltage level.
R phase has a phase angle of 0 degrees and is usually connected to the red wire.
Y phase has a phase angle of 120 degrees and is usually connected to the yellow wire.
B phase has a phase angle of 240 degrees and is usually connected to the blue wire.
The voltage level of each phase is the same, but they are out of ph...
In series, voltage adds up while current remains the same. In parallel, voltage remains the same while current adds up.
In series, batteries are connected end-to-end, positive to negative. In parallel, batteries are connected positive to positive and negative to negative.
Series connection increases voltage but does not increase current. Parallel connection increases current but does not increase voltage.
Series connectio...
Periodic maintenance of batteries is crucial for their longevity and optimal performance.
Check the battery terminals for corrosion and clean them if necessary
Inspect the battery case for any cracks or damage
Ensure that the battery is securely fastened in place
Check the electrolyte level and top up with distilled water if required
Test the battery voltage and recharge if necessary
A faulty battery can be identified by checking its voltage, capacity, and physical appearance.
Check the voltage of the battery using a multimeter
Test the capacity of the battery using a battery tester
Inspect the physical appearance of the battery for any signs of damage or leakage
Check the battery terminals for corrosion or loose connections
Compare the battery's performance to its specifications
FUSE, MCB, ELCB, and RCCB are all electrical protection devices, but they differ in their functions and applications.
FUSE is a simple device that protects electrical circuits from overloading or short-circuiting by melting and breaking the circuit.
MCB (Miniature Circuit Breaker) is an automatic switch that trips and cuts off the power supply when there is an overload or short-circuit.
ELCB (Earth Leakage Circuit Breaker...
A DOL starter is a direct online motor starter that provides full voltage to the motor.
Consists of a contactor, overload relay, and start/stop buttons
The contactor connects the motor to the power supply
The overload relay protects the motor from overloading
The start/stop buttons control the on/off function of the motor
Used for small motors with low starting current
Not suitable for large motors or motors with high starti
posted on 26 Oct 2023
I appeared for an interview before Oct 2022.
AC and DC both have their own challenges, but AC is generally considered more difficult due to its changing voltage and frequency.
AC involves constantly changing voltage and frequency, which can be more challenging to work with compared to the steady flow of DC.
AC circuits require additional components like capacitors and inductors to manage voltage and current fluctuations.
DC circuits are simpler to understand and tro...
I applied via Referral and was interviewed before Jan 2021. There were 4 interview rounds.
posted on 18 Oct 2021
I appeared for an interview before Oct 2020.
I applied via Naukri.com and was interviewed in Jan 2021. There was 1 interview round.
based on 2 interviews
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