Jamna Auto Industries Senior Engineer Purchase Interview Questions and Answers for Experienced

Q1. About your company and his process
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Q1. What is role of approach in chiller
Ans. 
Approach in chiller refers to the method or strategy used to control the temperature of the chilled water.
• Approach in chiller is the temperature difference between the leaving chilled water and the entering chilled water.

• A smaller approach indicates better chiller performance.

• Approach can be controlled by adjusting the flow rate of the chilled water or the setpoint of the chiller.

• Monitoring approach is important to ens
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Q2. Which factors are affecting cooling tower efficiency
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Factors affecting cooling tower efficiency include water quality, air flow, temperature differentials, and fouling.
• Water quality - Impurities in water can reduce heat transfer efficiency.

• Air flow - Proper air flow is essential for heat exchange.

• Temperature differentials - Larger differentials between hot and cold water improve efficiency.

• Fouling - Buildup of scale or debris can decrease efficiency.
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Q1. Which programming languages do you use regularly in your work?
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I regularly use Python, Java, and C++ in my work as a Junior Engineer.
• Python

• Java

• C++
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Q2. Do you have any technical certifications that make you qualified for this job?
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Q1. Tell me about yourself/your work experience
Ans. 
I am a design engineer with 5 years of experience in product development and CAD modeling.
• Worked on designing and developing new products from concept to production

• Proficient in CAD software such as SolidWorks and AutoCAD

• Collaborated with cross-functional teams to ensure design feasibility and manufacturability

• Experience in prototyping and testing designs for performance and reliability
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Q2. Possible answer to “Tell me about yourself”
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Q3. Tell me about yourself.
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Q4. Why are you leaving your current job?
Ans. 
Seeking new challenges and opportunities for growth.
• Looking for new challenges and opportunities to grow professionally

• Interested in exploring different industries or technologies

• Seeking a better work-life balance or company culture

• Want to relocate to a different city or country for personal reasons
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Q5. Why should we hire you?
Ans. 
I have a strong background in design engineering with a proven track record of successful projects.
• I have a Bachelor's degree in Mechanical Engineering with a focus on design principles.

• I have completed multiple design projects during my internships, showcasing my skills in CAD software and problem-solving.

• I have received positive feedback from previous employers on my attention to detail and ability to meet project de
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Q1. What is fixture and jigs
Ans. 
Fixtures and jigs are tools used in manufacturing to hold and guide workpieces during machining or assembly processes.
• Fixtures are devices used to securely hold workpieces in place during machining operations

• Jigs are tools that guide cutting tools or other machinery during operations

• Fixtures and jigs help ensure accuracy, repeatability, and efficiency in manufacturing processes

• Examples include drill jigs for guiding dr...read more
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Q2. What is preventive maintenance
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Preventive maintenance is the practice of regularly inspecting, cleaning, and servicing equipment to prevent breakdowns and prolong its lifespan.
• Regularly scheduled inspections and maintenance tasks are performed to identify and address potential issues before they become major problems.

• Examples include changing air filters in HVAC systems, lubricating moving parts in machinery, and checking for leaks in plumbing syste...read more
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Q1. What is computer aided design
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Computer aided design (CAD) is the use of computer software to create, modify, analyze, and optimize designs for various industries.
• CAD allows engineers and designers to create 2D or 3D models of products or structures.

• It helps in visualizing and simulating designs before they are physically built.

• CAD software can be used in industries such as automotive, aerospace, architecture, and manufacturing.

• Examples of CAD softw
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Q2. What is computer aided manufacturing
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Computer aided manufacturing (CAM) is the use of software to control machine tools and related machinery in the manufacturing of workpieces.
• CAM software generates toolpaths and instructions for machines to follow during the manufacturing process.

• CAM systems can be used for various processes such as milling, turning, and laser cutting.

• CAM helps in automating and optimizing the manufacturing process, leading to increased...read more
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Reasoning and aptitude test

Q1. About drawing and gd&t
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Q2. Software knowledge
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Reasoning and aptitude test

Q1. About drawing and gd&t
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Q2. Software knowledge
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Q1. Self Introduction
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Q2. Salary Expectation
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Q3. Why are reason you previous company?
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Q1. All questions related to plastic 1. what is plastic rib thickness basis on wall thickness?
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Q2. 2. what is shutt off angle in molding?
Ans. 
Shut off angle in molding refers to the angle at which the mold halves meet and close to form a complete part.
• Shut off angle is crucial for ensuring proper part ejection and preventing flash formation.

• It is typically between 0.5 to 3 degrees, depending on the material and part design.

• A larger shut off angle may be required for parts with deep cavities or complex geometries.

• Improper shut off angle can lead to part defec
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Q3. 3. Plastic shrinkage
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Q4. 4. In pp plastic material coating or painting are used?
Ans. 
In pp plastic material, coating is preferred over painting for better adhesion and durability.
• Coating is commonly used on PP plastic material for better adhesion and durability

• Painting is less preferred on PP plastic due to poor adhesion and durability

• Examples of coatings for PP plastic include polypropylene-specific primers and adhesion promoters
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Q5. 5. How to define undercut angle in plastic?
Ans. 
Undercut angle in plastic is the angle between the side wall of a mold and the vertical direction.
• Undercut angle is important in plastic injection molding to ensure proper release of the part from the mold.

• It is typically measured in degrees and affects the draft angle required for the mold.

• A larger undercut angle allows for easier part ejection but may require more complex mold design.

• Examples of parts with undercut a...read more
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Q6. 6. what is warpage & sink marks in plastic & how to prevent?
Ans. 
Warpage and sink marks are common defects in plastic parts caused by uneven cooling. Prevention methods include proper gate design, cooling system optimization, and material selection.
• Warpage is the deformation of a plastic part due to uneven cooling, leading to dimensional inaccuracies.

• Sink marks are depressions on the surface of a plastic part caused by uneven cooling and shrinkage.

• Prevention methods include proper g...read more
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