Diffusion Engineers Senior Engineer Interview Questions and Answers

Q1. Basics and resume prepare
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Q1. What is motor ,how it's work
Ans. 
A motor is a device that converts electrical energy into mechanical energy to produce motion.
• Motors work on the principle of electromagnetic induction

• They consist of a rotor and a stator

• Common types include DC motors, AC motors, and stepper motors

• Motors are used in various applications such as industrial machinery, household appliances, and vehicles
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Q2. Pick current of motor
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The pick current of a motor refers to the maximum current that the motor can draw under normal operating conditions.
• Pick current is important for determining the appropriate size of protective devices such as fuses and circuit breakers.

• It is also crucial for selecting the right motor starter and ensuring the motor operates safely.

• For example, a motor with a pick current of 10A would require a fuse or circuit breaker ra...read more
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Q1. No round 2nd
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Q1. Have you prepared CAPA?
Ans. 
Yes, I have prepared CAPA (Corrective and Preventive Action) reports in my previous roles.
• Yes, I have prepared CAPA reports to address quality issues and prevent their recurrence.

• I have experience in conducting root cause analysis to identify the underlying issues.

• I have implemented corrective actions to address immediate concerns and preventive actions to avoid future issues.

• I have also monitored the effectiveness of
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Q2. What is APQP and their application
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APQP stands for Advanced Product Quality Planning. It is a structured method for defining and establishing the steps necessary to ensure that a product satisfies the customer.
• APQP is a quality framework used in the automotive industry to ensure that products meet customer requirements.

• It involves a series of phases including planning, product design and development, process design and development, product and process v...read more
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Q3. 7QC Tools and their application
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7QC Tools are a set of tools used for quality control and improvement in manufacturing processes.
• Check Sheet: Used to collect and analyze data, such as defects in a product.

• Histogram: Shows the frequency distribution of a set of data.

• Pareto Chart: Helps identify the most significant factors contributing to a problem.

• Cause and Effect Diagram (Fishbone Diagram): Used to identify and analyze potential causes of a problem.

• ...read more
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Q4. What all are the PPAP Documents?
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PPAP documents include documents like control plan, FMEA, measurement system analysis, etc.
• Control Plan

• FMEA (Failure Mode and Effects Analysis)

• Measurement System Analysis

• Part Submission Warrant

• Process Flow Diagram

• Appearance Approval Report
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Q5. Acceptance criteria for SPC&MSA
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Acceptance criteria for SPC&MSA involves setting specific requirements for statistical process control and measurement system analysis.
• Acceptance criteria for SPC should include specifications for control limits, process stability, and capability indices.

• Acceptance criteria for MSA should include requirements for bias, linearity, stability, repeatability, and reproducibility.

• Examples of acceptance criteria for SPC coul...read more
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Q6. How you're declaring the severity in PFMEA
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Severity in PFMEA is declared based on the potential impact of a failure mode on the overall process or product.
• Severity is typically rated on a scale from 1 to 10, with 1 being the least severe and 10 being the most severe.

• Consider the consequences of a failure mode on customer safety, regulatory compliance, product functionality, and overall process performance.

• Examples of high severity failure modes include those th...read more
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Q1. Based on your resume
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Some general knowledge questions

Q1. Mechanical related and lathe machine and CNC machine related questions
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Q2. Which material is used for cutting tool?
Ans. 
Cutting tools are made of various materials depending on the application.
• High-speed steel (HSS) is commonly used for general-purpose cutting tools.

• Carbide is used for cutting hard materials like steel and titanium.

• Ceramics are used for high-speed cutting of cast iron and other hard materials.

• Diamond is used for cutting non-ferrous materials like glass and ceramics.

• Cobalt steel is used for cutting stainless steel and ot
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Q3. 1mm how much microns?
Ans. 
1mm is equal to 1000 microns.
• 1mm = 1000 microns

• Micron is a unit of measurement for length equal to one millionth of a meter

• Microns are commonly used in manufacturing and engineering applications
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Q4. Vernier calipers and micro meters related questions?
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Q1. Why to attend this job?
Ans. 
To attend this job is an opportunity to apply my skills and knowledge in production engineering and contribute to the success of the company.
• Opportunity to utilize my technical skills and expertise in production engineering

• Chance to contribute to the success and growth of the company

• Ability to work on challenging projects and solve complex problems

• Opportunity for professional development and career advancement

• Collabora...read more
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Q2. Family background and why are you don't going higher education
Ans. 
I come from a supportive family background and chose not to pursue higher education for practical reasons.
• My family has always been supportive of my decisions and encouraged me to pursue my interests.

• I decided not to go for higher education because I wanted to gain practical experience in the field of production engineering.

• I believed that hands-on experience and learning on the job would be more valuable for my career...read more
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Online coding test and aptitude

Q1. Dsa and memory management basics
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Q1. Puzzles and Dsa
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