Napino Auto & Electronics Diploma Trainee Engineer Interview Questions and Answers

Q1. What is fluid ?
Ans. 
Fluid is a substance that flows and takes the shape of its container.
• Fluid is a state of matter that has no fixed shape and yields easily to external pressure.

• Examples of fluids include water, oil, and air.

• Fluids can be classified as liquids or gases based on their properties.
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Q2. What is powe r?
Ans. 
Power is the rate at which work is done or energy is transferred.
• Power is measured in watts (W)

• It is calculated as the product of voltage and current (P = V x I)

• Power can also be calculated as the rate of energy transfer (P = E / t)

• Higher power means more work can be done in a shorter amount of time
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Q3. What is machine
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A machine is a device that uses power to perform a task.
• Machines can be simple, like a lever or pulley, or complex, like a computer or car engine.

• They are designed to make work easier by transferring force from one point to another.

• Examples include washing machines, airplanes, and cranes.
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Q4. What is unit of power
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The unit of power is the watt (W), which measures the rate at which work is done or energy is transferred.
• The unit of power is the watt (W)

• Power is the rate at which work is done or energy is transferred

• 1 watt is equal to 1 joule per second

• Common examples of power include light bulbs (measured in watts) and engines (measured in horsepower)
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Q5. What is the unitless quantity
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A unitless quantity is a physical quantity that does not have any units associated with it.
• Unitless quantities are often used in mathematical calculations and comparisons.

• Examples include angles (measured in radians), pure numbers (such as ratios or percentages), and constants like pi.

• Unitless quantities are dimensionless and do not require any specific units for measurement.
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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
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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