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Cognizant Senior Electrical Technician Interview Questions and Answers
Cognizant Senior Electrical Technician Interview Experiences
1 interview found
Selected
I applied via Approached by Company and was interviewed in Apr 2023. There were 2 interview rounds.
(2 Questions)
- Q1. 3phase ac line voltage are not equal ?
- Ans.
Unequal 3-phase AC line voltage can cause various issues in electrical systems.
Unequal voltage can cause unbalanced loads, leading to overheating and damage to equipment.
It can also cause voltage drops and affect the performance of motors and other devices.
Proper monitoring and maintenance can help prevent these issues.
Possible causes of unequal voltage include faulty wiring, damaged transformers, and unbalanced loads.
...
- Q2. Stater on but motor not working ?
- Ans.
Possible causes could be faulty motor, broken belt, or tripped overload protection.
Check if the motor is receiving power and if the starter is functioning properly.
Inspect the motor for any signs of damage or wear and tear.
Check the belt for any signs of damage or if it has come off the pulley.
Check the overload protection to see if it has tripped and needs to be reset.
If all else fails, consult a professional for furt
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Selected
I applied via Company Website and was interviewed in Oct 2024. There was 1 interview round.
(6 Questions)
- Q1. What is the transformer?
- Ans.
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 voltage levels in electrical circuits.
They consist of two coils of wire, known as the primary and secondary coils.
The primary coil is connected to the input voltage source, while the secondary coil is connected to the output load.
Transformers...
- Q2. What is the UPS?
- Ans.
UPS stands for Uninterruptible Power Supply, a device that provides emergency power to a load when the input power source fails.
UPS ensures continuous power supply during power outages or fluctuations
It typically consists of a battery, inverter, and charger
Commonly used in data centers, hospitals, and critical infrastructure
Examples include APC, CyberPower, and Eaton UPS systems
- Q3. What is MCB ?
- Ans.
MCB stands for Miniature Circuit Breaker, a device designed to protect electrical circuits from overloads and short circuits.
MCB is a type of circuit breaker that automatically switches off electrical circuits during abnormal conditions like overload or short circuit.
It is commonly used in residential and commercial electrical installations to protect electrical equipment and prevent electrical fires.
MCBs are available...
- Q4. Current and Voltage difference?
- Ans.
Current is the flow of electric charge, measured in Amperes, while voltage is the force that drives the current, measured in Volts.
Current is the rate of flow of electric charge in a circuit.
Voltage is the electrical potential difference that drives the current.
Current is measured in Amperes (A) while Voltage is measured in Volts (V).
Ohm's Law relates current, voltage, and resistance: V = I * R.
- Q5. What is the CT AND PT?
- Ans.
CT and PT are electrical devices used in power systems to measure current and voltage respectively.
CT stands for Current Transformer and is used to measure high currents by stepping down the current to a lower value.
PT stands for Potential Transformer and is used to measure high voltages by stepping down the voltage to a lower value.
CTs and PTs are commonly used in power distribution systems to provide accurate measure
- Q6. What is the last rating MCB hou to the amps
- Ans.
The last rating MCB can go up to 125 amps.
The last rating MCB can typically go up to 125 amps.
MCBs are available in various ratings such as 6A, 10A, 16A, 32A, 63A, and 125A.
The rating of an MCB determines the maximum current it can safely handle before tripping.
For higher current requirements, larger MCBs or other protective devices like MCCBs may be used.
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Selected
Reasoning , mathematics
(2 Questions)
- Q1. What is behaviour ?
- Ans.
Behaviour refers to the way in which a person or animal acts or conducts themselves in response to a particular situation or stimulus.
Behaviour is influenced by genetics, environment, and past experiences.
It can be observed and measured through actions, reactions, and responses.
Behaviour can be categorized as either innate (instinctual) or learned.
Examples of behaviour include aggression, shyness, curiosity, and friend
- Q2. What is the best method in power transfers?
- Ans.
The best method in power transfers is through high voltage transmission lines.
High voltage transmission lines are more efficient in transferring power over long distances.
Using transformers to step up the voltage before transmission and step down the voltage at the receiving end helps minimize power loss.
HVDC (High Voltage Direct Current) transmission is another efficient method for long distance power transfers.
Smart ...
(2 Questions)
- Q1. What is current
- Ans.
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 can be either direct current (DC) or alternating current (AC)
Examples: A light bulb connected to a power source has current flowing through it
In a circuit, current flows from the positive terminal of the voltage source to the negative terminal
- Q2. What are the method to convert in inverter
- Ans.
Methods to convert inverter include pulse width modulation, sine wave modulation, and square wave modulation.
Pulse width modulation (PWM) is a common method used to convert inverter signals by varying the width of the pulses.
Sine wave modulation involves generating a sine wave signal to mimic the output of an inverter.
Square wave modulation produces a square wave output by switching between high and low voltage levels.
...
Selected
I applied via Recruitment Consulltant and was interviewed before Oct 2020. There was 1 interview round.
(2 Questions)
- Q1. Asking for bms system
- Q2. Previous year experience
- Ans.
I have 3 years of experience working as an Electrical Engineer in a power distribution company.
Designed electrical systems for new construction projects
Performed regular maintenance on electrical equipment
Troubleshooted and repaired electrical issues in a timely manner
Diploma Electrical Engineer Interview Questions & Answers
Tata Group
Anonymous
posted on 28 Feb 2024
Selected
I applied via AmbitionBox and was interviewed in Jan 2024. There was 1 interview round.
(5 Questions)
- Q1. My self and my education
- Q2. Salary and work
- Q3. Book knowledge for branch peper
- Q4. My technical skills isverynice.
- Q5. What is Monthly salary
(2 Questions)
- Q1. Why are power transformer trip
- Q2. Test off transformer
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I applied via Company Website and was interviewed in Jun 2022. There was 1 interview round.
(2 Questions)
- Q1. I am Ajay Kumar ghadai, I am form bhatrak, I have complete my ITI industrial technique institute Bhadrak.2011 ,
- Q2. I am continue in Infosys limited company electrical supervisor post in 5 years experience joining date 2018 to continue Sobha development limited 5 years experience joining date 2013 to 2018
Interview Preparation Tips
10 year experience
Interview Questionnaire
3 Questions
- Q1. C++ Pythan Allen Bradley matlab
- Ans. This is a coding language of computer applications mobile application development etc
- Q2. Maintenance engineer
- Q3. Pm work in a machine anyone
Interview Preparation Tips
nitin kumar
(2 Questions)
- Q1. Tell me about yourself.
- Q2. HR
(2 Questions)
- Q1. Tell me about yourself.
- Q2. H
(2 Questions)
- Q1. Tell me about yourself.
- Q2. H
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