Koyo Bearings India Production Interview Questions and Answers for Experienced

Technical questions and aptitude maths

Q1. Introduction, family background, Higher education and some technical questions
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Q1. Self introduction, Personalty test
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Q1. Thermodynamics laws, Type of Gears And Bearings
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Thermodynamics laws, types of gears and bearings
• Thermodynamics laws include the first law (conservation of energy), second law (entropy always increases), and third law (absolute zero is unattainable)

• Types of gears include spur, helical, bevel, worm, and rack and pinion

• Types of bearings include ball bearings, roller bearings, and plain bearings

• Gears and bearings are commonly used in machinery and mechanical systems
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Q2. Measurement, Heat treatment,
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Q1. Bearings about Metal type
Ans. 
Bearings are used to reduce friction between two moving parts. Metal type is important for bearing performance.
• Metal type affects bearing strength, durability, and resistance to corrosion.

• Common bearing metals include steel, bronze, and ceramic.

• Steel bearings are strong and durable, but can corrode in certain environments.

• Bronze bearings are self-lubricating and resistant to corrosion, but not as strong as steel.

• Cerami...read more
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Q2. Number system and skills about
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Q1. Favorite subject in diploma
Ans. 
My favorite subject in diploma is Electrical Engineering.
• I enjoy learning about electrical circuits and systems.

• I find the principles of electromagnetism fascinating.

• I am interested in power generation and distribution.

• I have a passion for designing and troubleshooting electrical systems.

• I excel in subjects like electrical machines and power electronics.
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Q2. Principal of grinding process
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Grinding process involves removing material from a workpiece using an abrasive wheel or belt.
• Grinding is a finishing process used to improve surface finish, accuracy, and dimensional tolerances.

• The principle of grinding involves the use of an abrasive material to remove material from the workpiece.

• The grinding wheel or belt rotates at high speed, while the workpiece is held stationary or fed into the rotating wheel.

• The...read more
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Q3. Strength and weekness
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Q1. Rejection and rework% in current industry
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The rejection and rework percentage in the current industry varies depending on the sector and the quality control measures implemented.
• The rejection and rework percentage can be affected by factors such as the type of product, the manufacturing process, and the quality control measures in place.

• In the automotive industry, the rejection and rework percentage can be as low as 1% for some manufacturers, while others may ...read more
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Q2. More intrest in field work or computer work
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Q1. Can Have your strength
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Q2. Discuss about family background
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Q3. My strength is problem solving
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Q4. My fimaly total 8 members and my father is a farmer and mother house wife
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Q1. Two stock and four stock engine difference
Ans. 
Two-stroke engines have power strokes every revolution, while four-stroke engines have power strokes every other revolution.
• Two-stroke engines have a simpler design with fewer moving parts.

• Four-stroke engines are more fuel efficient and produce less pollution.

• Two-stroke engines are commonly used in small power tools and motorcycles.

• Four-stroke engines are typically found in cars, trucks, and larger machinery.
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Mathematical type questions
No hard interview.

Q1. What is petrol engine
Ans. 
A petrol engine is an internal combustion engine that uses petrol as fuel to power the vehicle.
• Petrol engines are commonly used in cars, motorcycles, and small aircraft.

• They work by compressing a mixture of petrol and air in a cylinder, which is then ignited by a spark plug.

• The resulting explosion pushes a piston, which turns a crankshaft and powers the vehicle.

• Petrol engines are known for their high power output and q...read more
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Q2. Please explain the first and second law Thermodynamics
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First law of thermodynamics states that energy cannot be created or destroyed, only transferred or converted. Second law states that entropy of an isolated system always increases over time.
• First law is also known as law of conservation of energy

• Second law explains why heat flows from hot to cold objects

• Second law also states that no engine can be 100% efficient

• Entropy is a measure of disorder in a system

• Both laws are ...read more
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Q3. What is unit of pressure
Ans. 
The unit of pressure is Pascal (Pa)
• Pressure is defined as force per unit area

• The SI unit of force is Newton (N) and area is square meter (m²)

• 1 Pascal is equal to 1 Newton per square meter (N/m²)

• Other common units of pressure include atmosphere (atm), bar (bar), and pounds per square inch (psi)
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Q4. Different between two stroke and four stroke engine
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Two stroke engines have one power stroke per revolution while four stroke engines have one power stroke every two revolutions.
• Two stroke engines have a simpler design and are lighter than four stroke engines.

• Four stroke engines are more fuel efficient and produce less emissions than two stroke engines.

• Two stroke engines are commonly used in small power tools and motorcycles while four stroke engines are used in cars an...read more
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Q5. What is micrometres and snapmetre value
Ans. 
Micrometre is a unit of measurement for length, while snap gauge is a tool used to measure the thickness or diameter of an object.
• Micrometre is also known as a micron and is equal to one-millionth of a meter.

• Snap gauge is used in manufacturing to ensure the accuracy of machined parts.

• Snap gauge can be used to measure the thickness of paper, the diameter of a wire, or the width of a gap.

• Both micrometre and snap gauge ar...read more
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