Sona Comstar CNC Setter Interview Questions and Answers

Q1. What is mean of TTR & why required for powder coating process ?
Ans. 
TTR stands for Total Thickness Range and is required for powder coating process to ensure proper adhesion and durability.
• TTR is the range of thickness of the substrate and any coatings applied to it

• It is important for powder coating as it ensures proper adhesion and durability

• If the TTR is too large, the coating may not adhere properly or may crack and peel over time

• Examples of substrates with varying TTR include alumi
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Q2. What is mean of detection & prevention pokayoke?
Ans. 
Detection and prevention poka-yoke refers to the use of techniques to identify and prevent errors in a process.
• Poka-yoke is a Japanese term for mistake-proofing

• Detection poka-yoke involves identifying errors as they occur

• Prevention poka-yoke involves designing processes to prevent errors from occurring

• Examples of poka-yoke include using checklists, color-coding, and physical barriers

• Poka-yoke can improve quality, reduc
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Q3. Which condition PH decrease in conversion coating?
Ans. 
Decrease in pH can occur due to various factors in conversion coating.
• Decrease in pH can be caused by the addition of an acid or acidic solution.

• Presence of reactive metals in the coating can lead to a decrease in pH.

• Contamination by organic materials or impurities can also lower the pH.

• Chemical reactions during the conversion coating process may result in pH decrease.

• Examples of conversion coatings include phosphating
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Q4. How to prepared 0.1 N H2so4 & Naoh ?
Ans. 
To prepare 0.1 N H2SO4 & NaOH, calculate the required amount of solute and dissolve it in distilled water.
• Calculate the molar mass of H2SO4 and NaOH

• Determine the required amount of solute using the formula: N = (W/M) x (1000/V)

• Dissolve the calculated amount of solute in distilled water to make 1 liter of solution

• Standardize the solution using a primary standard

• Use a burette to measure the volume of solution needed for
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Q5. How to cross verify 0.1 normality H2so4?
Ans. 
To cross verify 0.1 normality H2SO4, use a standard solution of NaOH and an indicator.
• Prepare a standard solution of NaOH of known concentration.

• Add a few drops of an indicator such as phenolphthalein to the H2SO4 solution.

• Titrate the H2SO4 solution with the NaOH solution until the endpoint is reached.

• The endpoint is when the indicator changes color, indicating that all the H2SO4 has reacted with the NaOH.

• Calculate the...read more
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Q6. How to prepared ph buffer solution as per defined standard in tablet?
Ans. 
Prepare a pH buffer solution as per defined standard in tablet.
• Determine the required pH value and buffer capacity

• Select the appropriate buffer system and calculate the required amounts of buffer components

• Dissolve the buffer components in water and adjust the pH as necessary

• Check the pH and adjust if necessary

• Filter the solution and store in a clean container

• Use a calibrated pH meter to verify the pH of the solution
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Department and work related question.

Q1. Personal information
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Q2. Education related question?
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Reasoning, General English,Maths

Q1. Unit Operations,Process Engineering,Heat transfer,Mass transfer Operations.
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Q1. Communication skills,Habits, interested things etc
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Q2. Salary discussion, Some basic Details from me.
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General English, Maths,Basics in Diploma.

Q1. Communication skills, knowledge development and Aptitude,Life Goals.
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Q2. Self details and discuss with some company benefits. Salary discussion
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Q3. Some company rules and regulations share with me.
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Q1. Self introduction or family background branch realated questions
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Q1. How many type of defect and define those defects in detail?
Ans. 
There are three main types of defects in engineering: design defects, manufacturing defects, and usage defects.
• Design defects occur when there is an issue with the initial design of a product, leading to problems in its functionality or safety. For example, a car with a faulty braking system due to a design flaw.

• Manufacturing defects happen during the production process, resulting in a product that does not meet the in...read more
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Q2. Define 7 wastes
Ans. 
The 7 wastes refer to inefficiencies in a process that can be eliminated to improve productivity and quality.
• Transportation: Unnecessary movement of materials or products

• Inventory: Excess inventory leading to waste of resources

• Motion: Unnecessary movement of people

• Waiting: Idle time in a process

• Overproduction: Producing more than needed

• Overprocessing: Doing more work than necessary

• Defects: Errors that require rework or
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Q3. What is line balance and how we can say line is balance?
Ans. 
Line balance refers to distributing workload evenly among different stations in a production line to optimize efficiency.
• Line balance ensures that each station in the production line has a similar amount of work to do.

• It helps in preventing bottlenecks and maximizing throughput.

• Line balance can be achieved by adjusting the cycle times at each station or by adding/subtracting workstations.

• An example of line balance is i...read more
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Q4. How you start you day in office??
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Q5. How we can reduce defects and increase productivity?
Ans. 
To reduce defects and increase productivity, focus on continuous improvement, training, quality control, and efficient processes.
• Implement a quality control system to catch defects early on

• Provide regular training to employees to improve skills and knowledge

• Analyze data to identify root causes of defects and implement corrective actions

• Streamline processes to eliminate waste and improve efficiency
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Q6. What is an OEE and define which factors affect this ?
Ans. 
OEE stands for Overall Equipment Effectiveness, a measure of how well a manufacturing process is utilized.
• OEE is calculated by multiplying Availability, Performance, and Quality.

• Factors affecting OEE include equipment downtime, speed loss, and defects in production.

• Improving OEE involves reducing downtime, increasing production speed, and minimizing defects.

• For example, implementing preventive maintenance can reduce eq
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Q1. Where are you from ?
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Q2. How many members in your family?
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Q3. What is occupation of your father and mother?
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Q4. Are you ready for relocate?
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