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R R GROUP Electrical Maintenance Engineer Interview Questions and Answers

Updated 28 Nov 2020

6 Interview questions

An Electrical Maintenance Engineer was asked
Q. What is an isolator, and what are its types?
Ans. 

An isolator is an electrical switch used to isolate a circuit from the power source. There are different types of isolators.

  • Isolators are used to disconnect a circuit from the power source for maintenance or repair.

  • They are also used for safety purposes to prevent electrical shocks.

  • Types of isolators include load break isolators, pantograph isolators, and center break isolators.

  • Load break isolators are used for lo...

An Electrical Maintenance Engineer was asked
Q. What is the humming effect?
Ans. 

Humming effect is a low-frequency noise produced by electrical equipment or machinery.

  • It is caused by the vibration of the equipment or machinery.

  • It can be a sign of a problem with the equipment or machinery.

  • It can be reduced by proper maintenance and lubrication.

  • Examples include transformers, motors, and generators.

  • It can also be caused by electrical interference from other equipment or sources.

Electrical Maintenance Engineer Interview Questions Asked at Other Companies

Q1. Is that you know Digital Multimeter? Show me how to use for diffe ... read more
Q2. Tell me about proximity sensors and their types, including their ... read more
Q3. If I provide you with two 8-pin relays, an SMPS, a DC motor, and ... read more
Q4. What is power factor & how you will improve PF? Types of PF?
Q5. How many types of companies which produce's PLC? Which one progra ... read more
An Electrical Maintenance Engineer was asked
Q. What is a transformer protection system?
Ans. 

Transformer protection system is a set of devices and techniques used to protect transformers from damage.

  • It includes devices like Buchholz relay, differential relay, and overcurrent relay.

  • The system detects faults and isolates the transformer from the network to prevent further damage.

  • It also includes techniques like oil level monitoring and temperature monitoring.

  • The protection system is essential for ensuring t...

An Electrical Maintenance Engineer was asked
Q. What is a circuit breaker?
Ans. 

A circuit breaker is an electrical switch that automatically interrupts an electrical circuit when it detects a fault.

  • It is used to protect electrical equipment from damage caused by overcurrent or short circuit.

  • It works by detecting the abnormal current flow and interrupting the circuit to prevent further damage.

  • There are different types of circuit breakers such as thermal, magnetic, and hybrid.

  • Examples of circui...

An Electrical Maintenance Engineer was asked
Q. What are relays and circuit breakers?
Ans. 

A relay is an electrically operated switch that uses an electromagnet to mechanically control the switching action. CB stands for Circuit Breaker, which is an automatic electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit.

  • Relay is an electrically operated switch

  • It uses an electromagnet to control the switching action

  • CB is short for Circuit Breaker

  • Circuit Break...

An Electrical Maintenance Engineer was asked
Q. Which starter is used for 1.5 HP to 20 HP motors?
Ans. 

For 1.5 HP to 20 HP motors, Direct-On-Line (DOL) starters are commonly used.

  • Direct-On-Line (DOL) starters are suitable for motors up to 20 HP.

  • DOL starters provide a simple and cost-effective method of starting motors.

  • For motors below 5 HP, a single-phase DOL starter can be used.

  • For motors above 5 HP, a three-phase DOL starter is typically used.

  • DOL starters directly connect the motor to the power supply, providing ...

R R GROUP Electrical Maintenance Engineer Interview Experiences

1 interview found

I applied via Campus Placement and was interviewed in Nov 2019. There were 5 interview rounds.

Interview Questionnaire 

7 Questions

  • Q1. What is circuit breaker?
  • Ans. 

    A circuit breaker is an electrical switch that automatically interrupts an electrical circuit when it detects a fault.

    • It is used to protect electrical equipment from damage caused by overcurrent or short circuit.

    • It works by detecting the abnormal current flow and interrupting the circuit to prevent further damage.

    • There are different types of circuit breakers such as thermal, magnetic, and hybrid.

    • Examples of circuit bre...

  • Answered by AI
  • Q2. What is transformer protection system?
  • Ans. 

    Transformer protection system is a set of devices and techniques used to protect transformers from damage.

    • It includes devices like Buchholz relay, differential relay, and overcurrent relay.

    • The system detects faults and isolates the transformer from the network to prevent further damage.

    • It also includes techniques like oil level monitoring and temperature monitoring.

    • The protection system is essential for ensuring the re...

  • Answered by AI
  • Q3. What is relay and CB ?
  • Ans. 

    A relay is an electrically operated switch that uses an electromagnet to mechanically control the switching action. CB stands for Circuit Breaker, which is an automatic electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit.

    • Relay is an electrically operated switch

    • It uses an electromagnet to control the switching action

    • CB is short for Circuit Breaker

    • Circuit Breaker pr...

  • Answered by AI
  • Q4. What is humming effect?
  • Ans. 

    Humming effect is a low-frequency noise produced by electrical equipment or machinery.

    • It is caused by the vibration of the equipment or machinery.

    • It can be a sign of a problem with the equipment or machinery.

    • It can be reduced by proper maintenance and lubrication.

    • Examples include transformers, motors, and generators.

    • It can also be caused by electrical interference from other equipment or sources.

  • Answered by AI
  • Q5. D.O.L starter figure.
  • Q6. 1.5 HP to 20 HP motors which starter used ?
  • Ans. 

    For 1.5 HP to 20 HP motors, Direct-On-Line (DOL) starters are commonly used.

    • Direct-On-Line (DOL) starters are suitable for motors up to 20 HP.

    • DOL starters provide a simple and cost-effective method of starting motors.

    • For motors below 5 HP, a single-phase DOL starter can be used.

    • For motors above 5 HP, a three-phase DOL starter is typically used.

    • DOL starters directly connect the motor to the power supply, providing full ...

  • Answered by AI
  • Q7. What is isolator and types.
  • Ans. 

    An isolator is an electrical switch used to isolate a circuit from the power source. There are different types of isolators.

    • Isolators are used to disconnect a circuit from the power source for maintenance or repair.

    • They are also used for safety purposes to prevent electrical shocks.

    • Types of isolators include load break isolators, pantograph isolators, and center break isolators.

    • Load break isolators are used for low vol...

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - First interview is attend the first of all discipline and behaviour is good.

Top trending discussions

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Interview Tips & Stories
6d (edited)
a team lead
Why are women still asked such personal questions in interview?
I recently went for an interview… and honestly, m still trying to process what just happened. Instead of being asked about my skills, experience, or how I could add value to the company… the questions took a totally unexpected turn. The interviewer started asking things like When are you getting married? Are you engaged? And m sure, if I had said I was married, the next question would’ve been How long have you been married? What does my personal life have to do with the job m applying for? This is where I felt the gender discrimination hit hard. These types of questions are so casually thrown at women during interviews but are they ever asked to men? No one asks male candidates if they’re planning a wedding or how old their kids are. So why is it okay to ask women? Can we please stop normalising this kind of behaviour in interviews? Our careers shouldn’t be judged by our relationship status. Period.
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Interview questions from similar companies

Interview Questionnaire 

1 Question

  • Q1. Control system

Electrical Maintenance Engineer Interview Questions Asked at Other Companies

Q1. Is that you know Digital Multimeter? Show me how to use for diffe ... read more
Q2. Tell me about proximity sensors and their types, including their ... read more
Q3. If I provide you with two 8-pin relays, an SMPS, a DC motor, and ... read more
Q4. What is power factor & how you will improve PF? Types of PF?
Q5. How many types of companies which produce's PLC? Which one progra ... read more

I applied via Company Website and was interviewed in Feb 2022. There were 3 interview rounds.

Round 1 - Resume Shortlist 
Pro Tip by AmbitionBox:
Don’t add your photo or details such as gender, age, and address in your resume. These details do not add any value.
View all tips
Round 2 - Technical 

(2 Questions)

  • Q1. Basic electrical engineering
  • Q2. Switch gear &protection
Round 3 - Product Management 

(1 Question)

  • Q1. Project automatic door opening using IR sensor
  • Ans. 

    An automatic door opening project using IR sensor.

    • IR sensor detects motion and sends signal to microcontroller

    • Microcontroller activates motor to open door

    • Door closes after a set time or when sensor detects no motion

    • Can be used in public places, hospitals, and homes

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Basic question any topics. I am intrested basic
Electrical engineering

I applied via Naukri.com and was interviewed in Dec 2021. There were 2 interview rounds.

Round 1 - HR 

(4 Questions)

  • Q1. Share details of your previous job.
  • Ans. 

    I am Shri ram singh form allahabad uttar pradesh 

    I am complited Diploma in electrical engineering fresher about quelifection 10+2

    Job tellyi electrical mintenese  

  • Answered by SHRI RAM SINGH
  • Q2. Why should we hire you?
  • Q3. What are your strengths and weaknesses?
  • Q4. Tell me about yourself.
Round 2 - Resume Shortlist 
Pro Tip by AmbitionBox:
Keep your resume crisp and to the point. A recruiter looks at your resume for an average of 6 seconds, make sure to leave the best impression.
View all tips

Interview Preparation Tips

Interview preparation tips for other job seekers - I am Shri ram singh form allahabad
Diploma electrical holder trening

I applied via Recruitment Consulltant and was interviewed in May 2022. There was 1 interview round.

Round 1 - Technical 

(3 Questions)

  • Q1. What is circuit, how work switch
  • Ans. 

    A circuit is a closed loop of conductive material that allows electricity to flow. A switch is a device that controls the flow of electricity in a circuit.

    • A circuit is made up of a power source, conductive material, and a load.

    • Electricity flows from the power source through the conductive material and into the load.

    • A switch is used to open or close the circuit, controlling the flow of electricity.

    • Switches can be manual...

  • Answered by AI
  • Q2. And about electrical safety
  • Q3. What type of source of electrical energy ,what is MCB and why use MCB ,and process of electrical energy generation to consumers
  • Ans. 

    MCB is a type of source of electrical energy used for protection against overload and short circuit.

    • MCB stands for Miniature Circuit Breaker.

    • It is a device that automatically switches off the electrical circuit during abnormal conditions such as overload or short circuit.

    • MCBs are commonly used in residential, commercial, and industrial electrical installations.

    • They provide protection to electrical equipment and prevent...

  • Answered by AI

Interview Preparation Tips

Topics to prepare for Wipro Electrical Maintenance Engineer interview:
  • Electrical Works
  • Basic electrica
Interview preparation tips for other job seekers - I advise all of you we will do work from heart

I applied via Company Website and was interviewed in Mar 2022. There were 2 interview rounds.

Round 1 - HR 

(1 Question)

  • Q1. Tell me about yourself.
Round 2 - Assignment 

I'm Ramesh L working on cognizant technology solutions Pvt Ltd in electrical engineering

Interview Preparation Tips

Interview preparation tips for other job seekers - We Ara a main think work sefty and our team working with communicate we have if any problem solving
Interview experience
4
Good
Difficulty level
-
Process Duration
-
Result
-
  • Q1. How to use DOL & STAR DELTA
  • Ans. 

    DOL and Star Delta starters are methods for controlling the starting current of electric motors to prevent damage and ensure efficiency.

    • DOL (Direct On Line) starters connect the motor directly to the power supply, suitable for small motors.

    • Star Delta starters reduce starting current by initially connecting the motor in a star configuration, then switching to delta.

    • Example: A 15 kW motor may use DOL for direct start, wh...

  • Answered by AI
  • Q2. Explain the Transformer & motor, generator
  • Ans. 

    Transformers, motors, and generators are essential electrical devices for energy conversion and distribution.

    • Transformers transfer electrical energy between circuits through electromagnetic induction.

    • Example: Step-up transformers increase voltage for long-distance transmission.

    • Motors convert electrical energy into mechanical energy to perform work.

    • Example: Induction motors are widely used in industrial applications.

    • Gen...

  • Answered by AI
  • Q3. How to select cables for electrical work
  • Ans. 

    Selecting cables involves considering factors like load, distance, insulation type, and environmental conditions.

    • Determine the load current: Calculate the maximum current the cable will carry based on the connected devices.

    • Consider voltage drop: Ensure the cable length and size minimize voltage drop to acceptable levels, typically below 3-5%.

    • Select appropriate insulation: Choose insulation material based on environment...

  • Answered by AI
Are these interview questions helpful?
Interview experience
5
Excellent
Difficulty level
Easy
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Campus Placement and was interviewed in Apr 2024. There was 1 interview round.

Round 1 - One-on-one 

(5 Questions)

  • Q1. Current (I) =voltage (V)/Resistance (R)
  • Ans. 

    Ohm's Law states that current is equal to voltage divided by resistance.

    • Ohm's Law is a fundamental principle in electrical engineering

    • Current (I) is measured in Amperes (A)

    • Voltage (V) is measured in Volts (V)

    • Resistance (R) is measured in Ohms (Ω)

    • The formula I = V/R can be used to calculate current in a circuit

  • Answered by AI
  • Q2. What it ohm's law
  • Ans. 

    Ohm's law states that the current flowing through a conductor between two points is directly proportional to the voltage across the two points.

    • Ohm's law is represented by the equation V = IR, where V is voltage, I is current, and R is resistance.

    • It is named after German physicist Georg Simon Ohm.

    • Ohm's law is fundamental in the field of electrical engineering and is used to analyze and design electrical circuits.

    • It help...

  • Answered by AI
  • Q3. SI unit of flux
  • Ans. 

    Weber (Wb)

    • The SI unit of flux is Weber (Wb)

    • Flux is a measure of the flow of a physical quantity through a surface

    • It is commonly used in electromagnetism and is defined as the amount of magnetic field passing through a surface

  • Answered by AI
  • Q4. Difference between AC and DC
  • Ans. 

    AC stands for alternating current, which changes direction periodically, while DC stands for direct current, which flows in one direction.

    • AC changes direction periodically, while DC flows in one direction constantly.

    • AC is used in household appliances and power distribution, while DC is used in batteries and electronic devices.

    • AC can be easily converted to different voltage levels using transformers, while DC requires m...

  • Answered by AI
  • Q5. How will you calculate current carrying in a conductor ?
  • Ans. 

    Current carrying in a conductor can be calculated using Ohm's Law, which states that current (I) equals voltage (V) divided by resistance (R).

    • Use Ohm's Law: I = V / R

    • Determine the voltage across the conductor

    • Find the resistance of the conductor

    • Calculate the current flowing through the conductor using the formula

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Contact me those who are in my position
Interview experience
1
Bad
Difficulty level
Moderate
Process Duration
2-4 weeks
Result
Selected Selected
  • Q1. Say something about ourselves
  • Q2. HT < panel details.

Interview Preparation Tips

Interview preparation tips for other job seekers - Don't go in Amazon, bad work culture, never work life balance, toxic people

I applied via Referral and was interviewed in Apr 2021. There were 3 interview rounds.

Interview Questionnaire 

1 Question

  • Q1. How to change the process

Interview Preparation Tips

Interview preparation tips for other job seekers - Interview panel is good but working with manger is not

R R GROUP Interview FAQs

What are the top questions asked in R R GROUP Electrical Maintenance Engineer interview?

Some of the top questions asked at the R R GROUP Electrical Maintenance Engineer interview -

  1. 1.5 HP to 20 HP motors which starter use...read more
  2. What is transformer protection syst...read more
  3. What is relay and C...read more

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