Diffusion Engineers Senior Engineer Interview Questions and Answers

Q1. Tell me about your self
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Q2. Current profile Experience
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Q1. Costing of Commodities
Ans. 
Costing of commodities involves determining the expenses incurred in producing and selling goods.
• Costing involves identifying all the direct and indirect costs associated with producing a commodity

• Direct costs include raw materials, labor, and manufacturing expenses

• Indirect costs include overhead expenses such as rent, utilities, and administrative costs

• The total cost is then divided by the number of units produced to ...read more
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Q2. Commercial terms and Conditions
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Total 30 questions each carrying 1 mark.
Passing marks are 19. The test was conducted online.

Q1. Domain Questions basically of Engineering level
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Q2. Weight Calculations of mechanical systems.
Ans. 
Weight calculations are crucial for designing and analyzing mechanical systems.
• Weight calculations involve determining the weight of individual components and the overall system.

• This information is used to ensure that the system can support its own weight and any additional loads.

• Factors such as material density, dimensions, and distribution of weight must be taken into account.

• Computer-aided design (CAD) software can ...read more
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Q3. Questions on Engineering favourite Subjects.
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Q4. Work Location Based Discussion
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Q1. Salary Expectations and Joining details
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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. What means the General tolerances
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General tolerances refer to the acceptable range of variation in dimensions or properties of a part or product.
• General tolerances are typically specified in engineering drawings to ensure parts fit and function properly.

• They are usually expressed as a range of acceptable values, such as +/- 0.1mm.

• Tolerances can vary depending on the specific requirements of the part or product.

• Examples of general tolerances include dim...read more
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Q2. What is the material for wheel, Pin
Ans. 
The material for wheel is typically rubber or plastic, while the material for pin is usually metal such as steel or aluminum.
• Wheel material is commonly rubber or plastic for flexibility and durability

• Pin material is usually metal like steel or aluminum for strength and stability
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Q3. What are the grades of Hardwares like Screw, nut washer
Ans. 
Hardware grades are typically classified based on material composition, strength, and corrosion resistance.
• Hardware grades are often denoted by a combination of letters and numbers, such as Grade 8.8 or Grade 316.

• Higher grade numbers generally indicate a higher tensile strength or corrosion resistance.

• Common grades for screws include Grade 2, Grade 5, and Grade 8, with Grade 8 being the strongest.

• For nuts and washers, ...read more
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Q4. How to calculate motor power
Ans. 
Motor power can be calculated using the formula: Power (W) = Torque (Nm) x Speed (RPM) / 9.548
• Calculate the torque required for the application

• Determine the speed at which the motor will operate

• Use the formula Power (W) = Torque (Nm) x Speed (RPM) / 9.548 to calculate motor power
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Q5. How welds are considered
Ans. 
Welds are critical in design engineering for joining metal components together.
• Welds must be strong enough to withstand the intended load and stress.

• Proper welding techniques and materials must be used to ensure the integrity of the weld.

• Inspections and testing should be conducted to verify the quality of the weld.

• Consideration should be given to factors such as joint design, welding process, and material compatibility...read more
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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
Ans. 
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?
Ans. 
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. Self introduction
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Q2. Key project and learning
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Q1. Based on your resume
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Q1. What is your current salary?
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Q2. What is your expectations?
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Q3. What is your reason change to company?
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