Yanmar Engine Manufacturing Interview Questions and Answers

Medium level question

Q1. Bio data & family detail
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Q2. Skill evaluate and long time work in our organisation
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Q1. What is the efficiency of Diesel engine ?
Ans. 
The efficiency of a Diesel engine can vary depending on factors such as design, maintenance, and operating conditions.
• Efficiency of a Diesel engine is typically around 30-40%, compared to gasoline engines which are around 20-30%.

• Factors affecting efficiency include compression ratio, fuel injection system, combustion process, and heat recovery systems.

• Improvements in technology, such as turbocharging and direct injecti...read more
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Q2. What is Diesel Cycle ?
Ans. 
Diesel cycle is a thermodynamic cycle used in diesel engines to convert heat into work.
• Diesel cycle is a type of internal combustion engine cycle.

• It consists of two constant pressure processes and two constant volume processes.

• Air is compressed adiabatically in the compression stroke.

• Fuel is injected and ignited at constant pressure in the combustion stroke.

• The expansion stroke is where work is produced.

• Exhaust gases a...read more
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Q3. What is the use of radiator cap in radiator ?
Ans. 
The radiator cap helps maintain the proper pressure in the cooling system, preventing overheating and allowing coolant to circulate efficiently.
• Maintains the correct pressure in the cooling system to prevent overheating

• Allows coolant to circulate effectively throughout the engine

• Helps prevent coolant from boiling over by raising the boiling point under pressure
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Q4. What can cause noise in Diesel engine ?
Ans. 
Noise in Diesel engine can be caused by combustion process, mechanical components, fuel injection system, and exhaust system.
• Combustion process: incomplete combustion, incorrect fuel injection timing

• Mechanical components: worn out piston rings, loose components

• Fuel injection system: clogged fuel injectors, incorrect fuel pressure

• Exhaust system: leaks in exhaust manifold, damaged muffler
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Q5. What is back pressure ?
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Back pressure is the resistance or force opposing the desired flow of fluids or gases in a system.
• Back pressure can occur in various systems such as plumbing, HVAC, and automotive exhaust systems.

• It can lead to reduced efficiency, increased energy consumption, and potential damage to components.

• Examples include a clogged pipe causing water to back up, or a blocked exhaust causing engine performance issues.
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Q6. Components in Fuel system ?
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Components in a fuel system include fuel tank, fuel pump, fuel filter, fuel injectors, and fuel lines.
• Fuel tank stores the fuel

• Fuel pump delivers fuel to the engine

• Fuel filter removes impurities from the fuel

• Fuel injectors spray fuel into the engine cylinders

• Fuel lines transport fuel throughout the system
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Q1. What Is meant by FMEA
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FMEA stands for Failure Mode and Effects Analysis, a systematic method for identifying and preventing potential failures in a process or product.
• FMEA is a proactive approach used to analyze potential failure modes, their causes, and the effects of these failures.

• It helps in prioritizing and addressing potential risks to improve reliability and safety.

• FMEA involves identifying failure modes, determining their likelihood...read more
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Q2. What is your KPI
Ans. 
My KPI is to increase production efficiency by 15% within the next year.
• Increase production efficiency by 15%

• Reduce downtime by implementing preventive maintenance strategies

• Optimize production processes to minimize waste

• Implement cost-saving measures to improve overall profitability
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Q3. What is meant by OEE AND TPM
Ans. 
OEE stands for Overall Equipment Effectiveness and TPM stands for Total Productive Maintenance.
• OEE is a measure of how well a manufacturing process is utilized, taking into account availability, performance, and quality.

• TPM is a proactive approach to maintenance that aims to maximize equipment effectiveness and minimize downtime.

• Both OEE and TPM are important tools in improving productivity and efficiency in manufactur...read more
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Q4. In your past experience have u implemented AN POKA YOKE
Ans. 
Yes, I have implemented AN POKA YOKE in my past experience.
• Implemented AN POKA YOKE to prevent errors in production processes

• Designed foolproof mechanisms to ensure quality control

• Trained team members on the importance and implementation of AN POKA YOKE
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Q5. What is ur scrap rejection percentage
Ans. 
My scrap rejection percentage is currently at 2%, which is well below industry standards.
• Current scrap rejection percentage is 2%

• Below industry standards

• Continuous improvement efforts in place to reduce further
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Q1. General Information about Work profile
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Q1. Related to Casting and machining developement Core to mould clearance What are the defects faced in block and head and remedies Supplier Quality control management Day to day line and assembly concerns r...read more
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Q1. Interview by Plant Head Working experience followed by Japanese Director
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Q1. Interview panel HR Head Hiring manager Department Head
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Q1. Why do you want to change your job Family background
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