Blue Star Senior AC Technician Interview Questions and Answers

Q1. About your current company & your role in there, major activity of your which helping your department.
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Q2. Draw some case study & explain improvements which you have done there
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Improved efficiency of production line at XYZ manufacturing plant
• Implemented lean manufacturing principles to reduce waste and increase productivity

• Introduced automation in certain processes to reduce manual labor and increase accuracy

• Optimized supply chain management to ensure timely delivery of raw materials

• Trained and empowered employees to identify and solve problems on the production line

• Implemented a continuous i...read more
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Q1. All questions are related to the fieldwork.
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Q1. Discuss about the previous company and their working projects, CTC and working cultures etc.
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Q1. Where do you see yourself in 5 years?
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Q2. What are your salary expectations?
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Q3. What is your family background?
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Q4. Share details of your previous job.
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Q5. Why should we hire you?
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Q6. Why are you looking for a change?
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Q7. What are your strengths and weaknesses?
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Q8. Tell me about yourself.
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Q1. Past experience
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Q2. About Btech Project
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Online coding test. Duration was 4 hours. Only one question was given. I had implement 4 APIs. Question was related to DP.

Q1. Can you tell me about yourself?
Ans. 
I am a Senior Engineer with 10+ years of experience in designing and implementing complex systems.
• 10+ years of experience in engineering

• Specialize in designing and implementing complex systems

• Strong problem-solving skills

• Experience with various programming languages such as Java, Python, and C++
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Q2. Tell me about project
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Designed and implemented a cloud-based data analytics platform for real-time monitoring of industrial equipment performance.
• Led a team of 5 engineers in developing the platform from scratch

• Utilized AWS services such as Lambda, S3, and DynamoDB for data storage and processing

• Implemented machine learning algorithms for predictive maintenance

• Integrated with existing industrial IoT devices for data collection

• Achieved 20% r...read more
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Q1. Salary negotiations
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Q1. What are the basics of the refrigeration cycle?
Ans. 
The refrigeration cycle is a thermodynamic process that removes heat from a designated area to lower its temperature.
• 1. Evaporation: Refrigerant absorbs heat from the environment, turning from liquid to gas.

• 2. Compression: The gas is compressed, increasing its pressure and temperature.

• 3. Condensation: The hot gas releases heat to the surroundings, condensing back into a liquid.

• 4. Expansion: The liquid refrigerant expan...read more
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Q2. What is the difference between chillers and Variable Refrigerant Flow (VRF) systems? What are the different types of compressors?
Ans. 
Chillers and VRF systems differ in design, application, and efficiency, with various compressor types influencing performance.
• Chillers are centralized cooling systems, while VRF systems are decentralized and allow for individual zone control.

• Chillers typically use water or refrigerant to cool large buildings, e.g., centrifugal chillers for commercial use.

• VRF systems use refrigerant as the cooling medium and can simulta...read more
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Q3. What is COP and heat load calculations. Types of PCBs in VRF. What is AHU and types
Ans. 
COP measures efficiency in heating/cooling systems; heat load calculations determine required capacity for HVAC systems.
• COP (Coefficient of Performance) is the ratio of useful heating or cooling provided to the energy consumed.

• Heat load calculations assess the thermal energy needed to maintain desired indoor temperatures.

• Types of PCBs (Printed Circuit Boards) in VRF (Variable Refrigerant Flow) systems include control P...read more
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