Napino Auto & Electronics Diploma Engineer Trainee - DET Interview Questions and Answers

Q1. Tell me about yourself.
Ans. 
I am a Diploma Engineer Trainee with a passion for learning and applying engineering principles.
• Completed a diploma in engineering with specialization in [field]

• Strong knowledge of [relevant engineering concepts]

• Experience in [specific engineering projects or internships]

• Proficient in using [relevant engineering software/tools]

• Excellent problem-solving and analytical skills

• Strong communication and teamwork abilities
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Q1. Difference between strain and stress diagram
Ans. 
Strain diagram shows the relationship between stress and strain in a material.
• Stress diagram shows the relationship between stress and deformation.

• Strain diagram is used to determine the elastic modulus, yield strength, and ultimate strength of a material.

• Stress diagram is used to determine the stress concentration and stress distribution in a material.

• Both diagrams are important in material testing and analysis.
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Q1. What is the combustion chamber ,?
Ans. 
The combustion chamber is where fuel and air are mixed and burned in an internal combustion engine.
• It is a part of an internal combustion engine where the fuel-air mixture is ignited and burned.

• The combustion chamber is designed to contain and control the combustion process.

• It is typically located within the cylinder head of an engine.

• The shape and design of the combustion chamber can affect engine performance and effi
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Q2. Explain the refrigerant system?.
Ans. 
Refrigerant system is a closed loop system that absorbs heat from a low-temperature area and releases it in a high-temperature area.
• Refrigerant circulates through the system to absorb and release heat

• Compressor increases the pressure of the refrigerant gas

• Condenser cools the refrigerant gas into a liquid

• Expansion valve reduces the pressure of the liquid refrigerant

• Evaporator absorbs heat from the surrounding area to co...read more
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Easy to moderate questions are given on general aptitude part.

Q1. What about yourself
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Q2. Tell about your college life
Ans. 
My college life was a mix of academics, extracurricular activities, and making lifelong friendships.
• Studied engineering with a focus on mechanical engineering

• Participated in various college events and competitions

• Was a member of the college robotics club

• Made close friends who I still keep in touch with
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Q3. Are you comfortable at any shift?
Ans. 
Yes, I am comfortable working at any shift as per the company's requirements.
• I am flexible and adaptable to different shift schedules.

• I understand the importance of teamwork and meeting project deadlines, which may require working different shifts.

• I am willing to adjust my personal schedule to accommodate the needs of the company.

• I have previous experience working in shifts and have successfully managed my time and res...read more
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Q1. What is your favourite subject?
Ans. 
My favorite subject is Mechanical Engineering because I enjoy learning about how machines work and designing new technologies.
• I enjoy studying topics like thermodynamics, fluid mechanics, and materials science.

• I like working on projects that involve designing and building machines or systems.

• I find the principles of mechanical engineering fascinating and enjoy applying them to real-world problems.
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Q2. Working of micrometre
Ans. 
Micrometre is a precision measuring instrument used to measure small distances accurately.
• Micrometre consists of a stationary anvil and a movable spindle.

• The object to be measured is placed between the anvil and spindle, and the spindle is turned to make contact with the object.

• The measurement is read from the scale on the sleeve and thimble of the micrometre.

• Micrometres are commonly used in engineering and manufacturi...read more
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Q3. What is degree of freedom
Ans. 
Degree of freedom refers to the number of independent variables or parameters that can vary in a system.
• Degree of freedom is the number of variables that can be changed independently without affecting the overall system.

• In mechanics, a rigid body in a plane has 3 degrees of freedom - two translations and one rotation.

• In thermodynamics, a simple compressible substance has 2 degrees of freedom - temperature and pressure.

• ...read more
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Q4. Types of forging , rolling
Ans. 
Forging and rolling are two common metalworking processes used to shape metal into desired forms.
• Forging involves shaping metal by applying compressive forces, typically using a hammer or press.

• Types of forging include open-die forging, closed-die forging, and impression-die forging.

• Rolling involves passing metal between rollers to reduce thickness or change shape.

• Types of rolling include hot rolling, cold rolling, and
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Q5. Tell me about manufacturing process
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Manufacturing process involves converting raw materials into finished products through various steps and techniques.
• Manufacturing process starts with the design of the product

• Raw materials are sourced and inspected for quality

• Materials are processed through various methods like casting, molding, machining, etc.

• Quality control checks are performed at different stages

• Finished products are packaged and distributed to cust
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All Machines information in Aptitude test

All employees are group discussion

Q1. How many axis in CNC machine.
Ans. 
Most CNC machines have 3 or 5 axes, but some advanced machines can have up to 9 axes.
• Most common CNC machines have 3 axes: X, Y, and Z.

• Some CNC machines have 5 axes: X, Y, Z, A, and B.

• Advanced CNC machines can have up to 9 axes, including rotational axes for more complex operations.

• The number of axes in a CNC machine determines the complexity of the operations it can perform.
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Q2. Define G and M code.
Ans. 
G and M codes are programming languages used in CNC machines to control various functions and operations.
• G codes are used to control the movement and positioning of the tool or workpiece on a CNC machine.

• M codes are used to activate or deactivate specific machine functions like coolant flow or spindle rotation.

• Example: G01 is a code for linear interpolation, while M03 is a code for spindle start in a CNC program.
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Q3. Difference between fiest angle projection and third angle projection.
Ans. 
First angle projection is commonly used in Europe and Asia, while third angle projection is commonly used in North America.
• First angle projection places the object in the first quadrant, with the plane of projection between the observer and the object.

• Third angle projection places the object in the third quadrant, with the plane of projection behind the object and the observer.

• In first angle projection, the top view is...read more
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Q4. Define 2 stroke and 4 stroke engine.
Ans. 
2 stroke engine completes the power cycle in 2 strokes of the piston, while 4 stroke engine completes it in 4 strokes.
• 2 stroke engine has intake, compression, power, and exhaust in 2 strokes

• 4 stroke engine has intake, compression, power, and exhaust in 4 strokes

• 2 stroke engines are simpler and lighter but less fuel efficient

• Examples of 2 stroke engines: chainsaws, mopeds, dirt bikes

• Examples of 4 stroke engines: cars, m
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Q5. Least count of digital vernier calliper.
Ans. 
The least count of a digital vernier caliper is the smallest measurement that can be read on the scale.
• The least count of a digital vernier caliper is typically 0.01 mm or 0.0005 inches.

• It is determined by the number of divisions on the main scale and the number of divisions on the vernier scale.

• For example, if the main scale has 10 divisions and the vernier scale has 9 divisions, the least count would be 0.1 mm / 10 =
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Q6. Define measuring gauge and it's types
Ans. 
Measuring gauge is a tool used to measure dimensions accurately. Types include calipers, micrometers, and height gauges.
• Measuring gauge is a precision tool used to measure dimensions accurately.

• Types of measuring gauges include calipers, micrometers, height gauges, etc.

• Calipers are used for measuring the distance between two opposite sides of an object.

• Micrometers are used for measuring very small distances or thicknes...read more
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Q7. Full form of CNC machine.
Ans. 
Computer Numerical Control machine is a manufacturing process that uses pre-programmed computer software to control the movement of tools and machinery.
• CNC stands for Computer Numerical Control

• CNC machines are used in manufacturing processes to automate tasks such as cutting, drilling, and milling

• Examples of CNC machines include CNC routers, CNC mills, and CNC lathes
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Q8. About college project.
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Q9. About connecting rod
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Q1. There was a first round of technical knowledge of theory of mechanics , machine design and some basic knowledge of other subjects
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Q2. Describe about yourself,
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Q1. All about family background, members, and some personal questions
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Group offline examination of all shortlisted candidates.

Q1. Informations of salary and about duty and other benifits. Document verification
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Q1. Mechanical related questions
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