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Voltamp Transformers Interview Questions and Answers
9 Interview questions
Testing transformers involves various methods to ensure functionality, safety, and efficiency in electrical systems.
Visual Inspection: Check for physical damage, corrosion, or leaks.
Insulation Resistance Testing: Measure insulation resistance using a megohmmeter to ensure safety.
Turns Ratio Test: Verify the turns ratio between primary and secondary windings to ensure proper voltage transformation.
Power Factor Test...
Radiators in transformers dissipate heat, ensuring efficient operation and preventing overheating through oil circulation.
Transformers generate heat during operation due to electrical losses.
Radiators are external heat exchangers that cool the transformer oil.
The oil circulates through the radiator, transferring heat to the air.
Cooling fins increase the surface area for better heat dissipation.
In larger transforme...
Delta and star connections are two methods of connecting three-phase electrical systems, affecting voltage and current distribution.
Delta connection (Δ) connects each phase to two others, forming a closed loop.
Star connection (Y) connects each phase to a common neutral point.
In delta, line voltage equals phase voltage; in star, line voltage is √3 times phase voltage.
Delta is used for high power applications; star ...
OSR detects overcurrent, while Buchholz relay protects transformers from faults by sensing gas and oil flow.
OSR (Overcurrent Relay) is used to detect overcurrent conditions in electrical circuits.
Buchholz relay is specifically designed for oil-filled transformers to detect gas accumulation and oil flow.
OSR operates based on current levels, while Buchholz relay operates based on physical changes in the transformer ...
Controlling devices in transformers are used to regulate voltage, protect against overloads, and ensure efficient operation.
Controlling devices such as tap changers are used to adjust the voltage ratio of the transformer to maintain a constant output voltage.
Protective devices like relays are used to detect and isolate faults such as overloads, short circuits, and overvoltage conditions.
Monitoring devices like tem...
Safety devices in transformers include pressure relief devices, Buchholz relay, and temperature sensors.
Pressure relief devices are used to release excess pressure in the transformer to prevent explosions.
Buchholz relay is a gas and oil operated relay that detects internal faults in the transformer.
Temperature sensors are used to monitor the temperature of the transformer and prevent overheating.
Voltamp Transformers HR Interview Questions
Delta connection and star connection are two types of connections used in electrical circuits. Delta connection is used for three-phase systems, while star connection is used for single-phase systems.
Delta connection is used in three-phase systems where the load is balanced and the power requirement is high.
Star connection is used in single-phase systems where the load is unbalanced and the power requirement is lo...
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 is connected to a source of alternating current
Alternating current in primary coil creates a changing magnetic field
This changing magnetic field induces a voltage in the secondary coil
Voltage in secondary coil can b...
Understanding IS and root cause of failure is crucial for preventing future issues in production.
IS stands for Information Systems, which are used to collect, store, process, and distribute information within an organization.
Root cause analysis is a method used to identify the underlying cause of a problem or failure.
Having a strong understanding of IS can help identify potential failures in the production process...
Voltamp Transformers Interview Experiences
10 interviews found
Lavina K
(2 Questions)
- Q1. Tell me about your self
- Q2. Technical transformation
Anonymous
I appeared for an interview in May 2025, where I was asked the following questions.
- Q1. Why to join this organisation?
- Ans.
I want to join this organization for its commitment to innovation, professional growth, and impactful projects that align with my career goals.
The organization has a strong reputation for fostering innovation, which excites me as I am eager to contribute to cutting-edge projects.
I admire the company's commitment to employee development, offering training programs that will enhance my skills and career trajectory.
The co...
- Q2. What you do for our organization?
- Ans.
I will contribute my technical skills, teamwork, and problem-solving abilities to enhance project efficiency and innovation.
Utilize engineering principles to design and improve systems, such as optimizing a production line for better efficiency.
Collaborate with cross-functional teams to ensure project goals are met, like working with the design team to refine product specifications.
Implement cost-effective solutions by...
- Q3. Tell me about your self?
- Q4. Technical questions and about related?
- Q5. What is your expected salary?
- Ans.
I expect a salary that reflects my skills, experience, and the industry standards for a Junior Engineer position.
Research industry standards: For example, Junior Engineers in my area typically earn between $60,000 and $70,000 annually.
Consider my qualifications: I have a degree in engineering and relevant internships that enhance my value.
Be open to negotiation: I am flexible and willing to discuss a salary that aligns...
I appeared for an interview in May 2025, where I was asked the following questions.
- Q1. What is your typical work profile and daily routine?
- Ans.
As Head of Projects, my routine involves strategic planning, team management, and stakeholder communication to ensure project success.
Morning meetings with project teams to review progress and address challenges.
Daily check-ins with stakeholders to align on project goals and timelines.
Strategic planning sessions to allocate resources effectively, such as assigning team members to critical tasks.
Regular risk assessment ...
- Q2. What challenges have you faced in project management and execution?
- Ans.
Project management challenges include scope creep, resource allocation, and stakeholder communication, impacting timelines and outcomes.
Scope Creep: In a software development project, additional features requested by stakeholders led to delays and budget overruns.
Resource Allocation: During a construction project, unexpected labor shortages forced us to reallocate resources, impacting project timelines.
Stakeholder Comm...
I applied via Referral and was interviewed in Mar 2024. There was 1 interview round.
(4 Questions)
- Q1. Process and understanding, Development of New facility
- Q2. Man power Handling - Contracts
- Q3. Understanding of IS and root cause of failure
- Ans.
Understanding IS and root cause of failure is crucial for preventing future issues in production.
IS stands for Information Systems, which are used to collect, store, process, and distribute information within an organization.
Root cause analysis is a method used to identify the underlying cause of a problem or failure.
Having a strong understanding of IS can help identify potential failures in the production process and ...
- Q4. Inspections handling
Interview Preparation Tips
- Basic Process knowledge
MALAY SHARMA
Selected
I applied via Referral and was interviewed in Feb 2024. There was 1 interview round.
(5 Questions)
- Q1. Basic question related to electrical and related to what they are manufacturing
- Q2. What is transformer and there working principle?
- Ans.
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 is connected to a source of alternating current
Alternating current in primary coil creates a changing magnetic field
This changing magnetic field induces a voltage in the secondary coil
Voltage in secondary coil can be hig...
- Q3. Safety devices in transformer?
- Q4. Controlling devices in the transformer and there working and why we are using?
- Ans.
Controlling devices in transformers are used to regulate voltage, protect against overloads, and ensure efficient operation.
Controlling devices such as tap changers are used to adjust the voltage ratio of the transformer to maintain a constant output voltage.
Protective devices like relays are used to detect and isolate faults such as overloads, short circuits, and overvoltage conditions.
Monitoring devices like temperat...
- Q5. What are delta connection and star connection why we use and when and where we use ?
Selected
I appeared for an interview in May 2023, where I was asked the following questions.
- Q1. What is the process for testing transformers?
- Ans.
Testing transformers involves various methods to ensure functionality, safety, and efficiency in electrical systems.
Visual Inspection: Check for physical damage, corrosion, or leaks.
Insulation Resistance Testing: Measure insulation resistance using a megohmmeter to ensure safety.
Turns Ratio Test: Verify the turns ratio between primary and secondary windings to ensure proper voltage transformation.
Power Factor Testing: ...
- Q2. Transformer installation
- Q3. Your last working role and working experience
- Ans.
In my last role as a Senior Service Engineer, I managed technical support and maintenance for complex systems, ensuring optimal performance.
Led a team of engineers to troubleshoot and resolve critical system failures, reducing downtime by 30%.
Implemented a new maintenance schedule that improved equipment reliability and extended lifespan by 20%.
Developed training materials for junior engineers, enhancing their skills a...
Interview Preparation Tips
(2 Questions)
- Q1. Only Transformer based Questions
- Q2. Transformers Testing, Maintenance
I applied via Walk-in and was interviewed in Apr 2023. There was 1 interview round.
(2 Questions)
- Q1. It was good experience
- Q2. What is your family background?
Interview Preparation Tips
lucky sharma
Selected
I appeared for an interview before Mar 2023, where I was asked the following questions.
- Q1. What is delta and star connection?
- Ans.
Delta and star connections are two methods of connecting three-phase electrical systems, affecting voltage and current distribution.
Delta connection (Δ) connects each phase to two others, forming a closed loop.
Star connection (Y) connects each phase to a common neutral point.
In delta, line voltage equals phase voltage; in star, line voltage is √3 times phase voltage.
Delta is used for high power applications; star is us...
- Q2. What is difference between OSR and buchholz relay?
- Ans.
OSR detects overcurrent, while Buchholz relay protects transformers from faults by sensing gas and oil flow.
OSR (Overcurrent Relay) is used to detect overcurrent conditions in electrical circuits.
Buchholz relay is specifically designed for oil-filled transformers to detect gas accumulation and oil flow.
OSR operates based on current levels, while Buchholz relay operates based on physical changes in the transformer oil.
E...
- Q3. How radiator works in the transformer for cooling?
- Ans.
Radiators in transformers dissipate heat, ensuring efficient operation and preventing overheating through oil circulation.
Transformers generate heat during operation due to electrical losses.
Radiators are external heat exchangers that cool the transformer oil.
The oil circulates through the radiator, transferring heat to the air.
Cooling fins increase the surface area for better heat dissipation.
In larger transformers, f...
- Q4. How we calculate voltage and current, if we know the power of transformer in KVA?
- Ans.
To calculate voltage and current from transformer power in KVA, use the formulas: Power (KVA) = Voltage (V) x Current (A).
Power (KVA) = Voltage (V) x Current (A) / 1000
For a 100 KVA transformer at 400V: Current = 100,000 VA / 400V = 250 A.
For a 50 KVA transformer at 230V: Current = 50,000 VA / 230V ≈ 217.39 A.
Voltage can also be calculated if current is known: Voltage = Power (KVA) x 1000 / Current (A).
I applied via AmbitionBox and was interviewed in Feb 2022. There were 2 interview rounds.
Group discussion
(8 Questions)
- Q1. What are your salary expectations?
- Q2. Why should we hire you?
- Q3. Share details of your previous job.
- Q4. What is your family background?
- Q5. Why are you looking for a change?
- Q6. Where do you see yourself in 5 years?
- Q7. What are your strengths and weaknesses?
- Q8. Tell me about yourself.
Interview Preparation Tips
- Transformers
Follow up on applications,
Set yourself apart with letters of recommendation.
Top trending discussions
Voltamp Transformers Interview FAQs
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Voltamp Transformers Interviews By Designations
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