50+ Production DET Interview Questions and Answers

Both petrol and diesel engines have their own advantages and disadvantages.

• Petrol engines are generally smoother and quieter than diesel engines.

• Diesel engines are more fuel-efficient and have more torque than petrol engines.

• Petrol engines are better suited for city driving while diesel engines are better for long-distance driving.

• The choice between petrol and diesel engines depends on the individual's driving needs and preferences.

Boiling point is the temperature at which a liquid turns into a gas.

• Boiling point of water in hills is lower than at sea level due to lower atmospheric pressure.

• Cooling towers use a range of approaches such as evaporative cooling and air-cooled heat exchangers.

• Conduction is the transfer of heat through a material, convection is the transfer of heat through a fluid, and radiation is the transfer of heat through electromagnetic waves.

• I cannot answer the project and summer inter...read more

A stepper motor is a type of brushless DC electric motor that divides a full rotation into a number of equal steps. High voltage transmission has advantages such as reduced line losses and lower cost per unit of power transmitted.

• Stepper motor is a brushless DC electric motor that divides rotation into steps

• High voltage transmission reduces line losses and cost per unit of power

• Corona is a discharge of electricity from a sharp conductor at high voltage

• Losses in transmission i...read more

The compression ratio of a diesel engine varies from 14:1 to 25:1 depending on the engine design and application.

• Compression ratio is the ratio of the volume of the combustion chamber at its largest to its smallest volume

• Higher compression ratios result in better fuel efficiency and power output

• Compression ratios for diesel engines typically range from 14:1 to 25:1

• The compression ratio of an engine can be calculated by measuring the volume of the combustion chamber at its lar...read more

I have knowledge of electronics and its applications in various fields.

• I have studied basic electronics in my academic curriculum.

• I am familiar with electronic components such as resistors, capacitors, transistors, and diodes.

• I have practical experience in designing and building simple electronic circuits.

• I understand the principles of digital electronics and have worked with logic gates and flip-flops.

• I am aware of the applications of electronics in fields such as telecommun...read more

The least cost of a vernier caliper can vary depending on the brand, quality, and features.

• The cost of a vernier caliper can range from $10 to $200 or more.

• Factors affecting the cost include the material used, accuracy, brand, and additional features like digital display.

• Cheaper vernier calipers may lack precision and durability compared to more expensive ones.

• Popular brands like Mitutoyo, Fowler, and Starrett offer a wide range of vernier calipers at different price points.

Yes, I have experience paying for automotive industry expenses.

• I have paid for vehicle maintenance and repairs.

• I have purchased car insurance.

• I have bought new tires for my vehicle.

• I have paid for registration and licensing fees.

• I have purchased fuel and other automotive supplies.

Centrifugal pumps work on the principle of converting rotational kinetic energy into hydrodynamic energy to move fluid through the pump.

• Centrifugal force is generated by the rotation of the impeller within the pump casing

• Fluid enters the pump through the center of the impeller and is flung outwards by centrifugal force

• The fluid is then directed towards the pump outlet by the pump casing

• The kinetic energy of the fluid is converted into pressure energy as it moves through the p...read more

There are two main types of breaks: rest breaks and meal breaks.

• Rest breaks are short breaks during the workday to rest and recharge.

• Meal breaks are longer breaks typically taken for eating meals.

• Examples: 15-minute rest break, 30-minute meal break

Transformers are used to change the voltage level of electricity for transmission and distribution. They consist of parts like core, windings, and insulation.

• Transformers are used to step up or step down voltage levels for transmission and distribution of electricity.

• Common types of transformers include power transformers, distribution transformers, and instrument transformers.

• Key parts of a transformer include the core, windings, insulation, and bushings.

• Examples of transfor...read more

RCA stands for Root Cause Analysis, a method used to identify the underlying cause of a problem or issue.

• RCA is a systematic process for identifying the root cause of a problem or issue.

• It involves investigating the problem, identifying possible causes, and determining the primary cause.

• RCA helps prevent the issue from recurring by addressing the root cause rather than just the symptoms.

• Example: If a production line keeps breaking down, RCA would involve looking into factors ...read more

5S is a method used in industrial settings to organize and maintain cleanliness for improved efficiency and safety.

• Sort: Remove unnecessary items from the workspace

• Set in order: Arrange necessary items in a logical and efficient manner

• Shine: Clean and inspect the workspace regularly

• Standardize: Establish protocols and standards for maintaining the workspace

• Sustain: Continuously uphold the 5S principles to ensure long-term success

Solvent, binders, additives, pigment, and dryer are essential components in the production of coatings.

• Solvent: used to dissolve the binder and additives to create a liquid mixture

• Binders: provide adhesion and cohesion to the coating, holding the pigment in place

• Additives: enhance the performance and properties of the coating, such as durability or color

• Pigment: provides color and opacity to the coating

• Dryer: accelerates the drying process of the coating

The unit of force is the newton (N), which is defined as the amount of force required to accelerate a mass of one kilogram at a rate of one meter per second squared.

• The unit of force is the newton (N)

• It is defined as the amount of force required to accelerate a mass of one kilogram at a rate of one meter per second squared

• Other units of force include pound-force (lbf) and dyne (dyn)

Quality assurance focuses on preventing defects, while quality control focuses on identifying and fixing defects.

• Quality assurance is process-oriented, focusing on preventing defects before they occur.

• Quality control is product-oriented, focusing on identifying defects after they occur.

• Quality assurance involves processes like audits, reviews, and process improvements.

• Quality control involves activities like inspections, testing, and sampling.

• Example: In a manufacturing plant...read more

The least count of a vernier caliper is the smallest measurement that can be read on the scale.

• The least count of a vernier caliper is typically 0.02 mm or 0.001 inches.

• It is determined by dividing the smallest division on the main scale by the total number of divisions on the vernier scale.

• For example, if the main scale has divisions of 1 mm and the vernier scale has 50 divisions, the least count would be 0.02 mm.

Computer Numerical Control

• Stands for Computer Numerical Control

• Used in manufacturing processes to control machining tools and 3D printers

• Automates the operation of machines based on pre-programmed sequences of commands

Hook's law states that the force required to extend or compress a spring is directly proportional to the distance it is stretched or compressed.

• It is a principle in physics that describes the relationship between the force applied to a spring and the distance the spring stretches or compresses.

• The law states that the force required to extend or compress a spring is directly proportional to the distance it is stretched or compressed.

• The constant of proportionality is known as ...read more

Welding is a process of joining two or more metal parts by heating them to a melting point and then allowing them to cool and fuse together.

• Welding requires a heat source, such as a torch or electric arc, to melt the metal parts

• The melted metal parts are then allowed to cool and fuse together, creating a strong bond

• Different types of welding include MIG, TIG, and stick welding

• Welding is used in various industries, including construction, manufacturing, and automotive

• Welding c...read more

A basic rule of transformer is that the primary and secondary windings must not be connected together directly.

• Primary and secondary windings should never be short-circuited.

• The transformer should be operated within its specified voltage and current ratings.

• Proper insulation should be maintained to prevent electrical leakage.

• Polarity should be observed when connecting the primary and secondary windings.

A diode is a semiconductor device that allows current to flow in one direction only.

• Diodes have a forward voltage drop, typically around 0.7V for silicon diodes

• They have a reverse breakdown voltage, beyond which they conduct in the reverse direction

• Diodes exhibit non-linear current-voltage characteristics

• Common types include rectifier diodes, zener diodes, and light-emitting diodes (LEDs)

There are two main types of gear: spur gears and helical gears.

• Spur gears have straight teeth and are used for high-speed applications.

• Helical gears have angled teeth for smoother operation and higher load capacity.

• Other types include bevel gears, worm gears, and rack and pinion gears.

Tool offset is the difference between the actual tool position and the programmed tool position, while VMC machine stands for Vertical Machining Center.

• Tool offset is used to compensate for variations in tool length or diameter

• VMC machines are used for milling, drilling, tapping, and other machining operations

• Tool offset is crucial for achieving accurate and precise machining results

• VMC machines are commonly used in manufacturing industries for producing complex parts

The unit of length is a measurement used to quantify distance or size.

• The most common unit of length in the metric system is the meter (m)

• Other units of length include centimeters (cm), kilometers (km), and millimeters (mm)

• In the imperial system, units of length include inches, feet, yards, and miles

Insulation is used in transformers to prevent electrical leakage and ensure safety and efficiency.

• Insulation prevents electrical leakage and ensures safety by reducing the risk of electric shock or short circuits.

• It helps maintain the efficiency of the transformer by reducing energy loss through leakage currents.

• Different types of insulation materials are used based on the voltage and application of the transformer, such as oil, paper, or resin.

• Proper insulation also helps in...read more

Torque is a measure of the rotational force applied to an object.

• Torque is calculated by multiplying the force applied by the distance from the pivot point.

• It is measured in units such as Newton-meters (Nm) or foot-pounds (ft-lb).

• Torque is essential in determining the ability of a force to rotate an object.

• Examples include tightening a bolt with a wrench or the force needed to turn a steering wheel.

RPS stands for Rapid Production System and TPM stands for Total Productive Maintenance.

• RPS focuses on improving production efficiency by reducing lead times and increasing productivity.

• TPM aims to maximize equipment effectiveness through proactive maintenance and employee involvement.

• Both RPS and TPM are strategies used in manufacturing to optimize production processes and minimize downtime.

• Example: Implementing TPM can help reduce breakdowns and improve overall equipment eff...read more

Machine design is the process of creating machines that perform specific functions efficiently and reliably.

• Machine design involves identifying the requirements of a machine, conceptualizing its design, and then detailing the design for manufacturing.

• Factors to consider in machine design include functionality, safety, cost, and ease of maintenance.

• Examples of machine design include designing a car engine, a conveyor belt system, or a robotic arm.

Units of temperature are used to measure the intensity of heat or cold.

• Celsius (°C)

• Fahrenheit (°F)

• Kelvin (K)

Power factor and Ohm's law are important concepts in electrical engineering to understand the relationship between power, voltage, current, and resistance.

• Power factor is the ratio of real power to apparent power in an electrical circuit.

• Ohm's law states that the current through a conductor between two points is directly proportional to the voltage across the two points.

• Understanding power factor helps in optimizing power efficiency and reducing energy costs in electrical sys...read more

Predictive maintenance is a proactive maintenance strategy that uses data analysis to predict when equipment failure is likely to occur.

• Uses data analysis to predict when equipment failure is likely to occur

• Helps in scheduling maintenance activities before a breakdown occurs

• Reduces downtime and increases equipment lifespan

• Examples: monitoring equipment sensors to detect anomalies, analyzing historical data to predict maintenance needs

Case hardening is a heat treatment process used to increase the hardness of the surface of a metal while maintaining a tough and ductile core.

• Involves heating the metal to a specific temperature and then quenching it in a substance like water, oil, or salt to create a hardened outer layer

• Commonly used in manufacturing to improve the wear resistance of components like gears, shafts, and tools

• Examples include carburizing, nitriding, and induction hardening

Saturation temperature is the temperature at which a substance changes from a liquid to a vapor at a given pressure.

• Saturation temperature is specific to a substance and pressure.

• It is the temperature at which a substance reaches its boiling point.

• For water at sea level, the saturation temperature is 100 degrees Celsius.

• Saturation temperature can be used to determine the state of a substance (liquid or vapor).

Pumps are used to move fluids or gases from one place to another.

• Pumps are used in various industries such as water treatment, oil and gas, and manufacturing.

• They can be used to transfer liquids, create pressure, or circulate fluids.

• Examples include centrifugal pumps, diaphragm pumps, and gear pumps.

A CNC machine is a computer-controlled machine tool used for cutting, shaping, and finishing materials like metal, wood, or plastic.

• CNC stands for Computer Numerical Control, meaning the machine is controlled by a computer program.

• CNC machines are highly precise and can repeat tasks with high accuracy.

• Common types of CNC machines include CNC mills, lathes, routers, and plasma cutters.

Paint paint refers to the substance used to coat surfaces for decorative or protective purposes.

• Paint paint is a liquid or solid material applied to surfaces to add color or protection.

• It can be made from pigments, binders, solvents, and additives.

• Examples include acrylic paint, oil paint, and spray paint.

Pressure is the force applied perpendicular to the surface of an object per unit area.

• Pressure is calculated as force divided by area (P = F/A).

• Pressure can be measured in units such as Pascals (Pa) or pounds per square inch (psi).

• Examples of pressure include atmospheric pressure, blood pressure, and tire pressure.

Engineering is the application of scientific and mathematical principles to design and create structures, machines, systems, and processes.

• Engineering involves problem-solving and innovation.

• Engineers use their knowledge of math and science to design and build solutions to various challenges.

• There are many different branches of engineering, such as civil, mechanical, electrical, and chemical engineering.

• Examples of engineering projects include designing bridges, developing ne...read more

A motor is a device that converts electrical energy into mechanical energy to produce motion.

• Motors are commonly used in various applications such as electric vehicles, industrial machinery, and household appliances.

• They work based on the principle of electromagnetic induction, where a current-carrying conductor experiences a force in the presence of a magnetic field.

• Motors can be categorized into different types, including DC motors, AC motors, stepper motors, and servo moto...read more

A fixture is a device used to securely hold and position a workpiece during a manufacturing operation.

• Fixtures are commonly used in machining operations to ensure accurate and repeatable positioning of the workpiece.

• They are designed to be rigid and stable to prevent movement during machining.

• Examples of fixtures include vices, clamps, jigs, and chucks.

• Fixtures can be custom-made for specific parts or standardized for general use.

Grinding is a manufacturing process that involves removing material from a workpiece using an abrasive wheel.

• Grinding is a machining process used to finish surfaces or create shapes with high precision.

• It is commonly used in metalworking, woodworking, and other industries.

• Examples of grinding operations include surface grinding, cylindrical grinding, and centerless grinding.

A jig brief is a document that outlines the specifications and requirements for creating a jig, which is a tool used in manufacturing to guide the placement of parts.

• Describes the dimensions, materials, and tolerances for the jig

• Includes instructions on how to use the jig effectively

• May contain diagrams or drawings for reference

A radiator is a device used to transfer heat from one medium to another for the purpose of cooling or heating.

• Radiator is commonly used in vehicles to cool the engine by transferring heat from the coolant to the air.

• It can also be used in buildings to heat the indoor space by transferring heat from hot water or steam to the air.

• Radiator typically consists of metal fins or tubes through which the heat transfer takes place.

• The effectiveness of a radiator depends on factors like...read more

Thermodynamics is the study of energy and heat transfer in systems, used to analyze and optimize processes in engineering and science.

• Thermodynamics is used to analyze energy transfer and conversion in various systems.

• It helps in understanding the behavior of gases, liquids, and solids under different conditions.

• Thermodynamics is crucial in designing efficient engines, refrigeration systems, and power plants.

• It is also used in chemical reactions, material science, and environ...read more

ERP Booking at Oracle is a process of scheduling and managing resources within the Oracle ERP system.

• ERP Booking involves creating and managing bookings for resources such as equipment, rooms, or personnel within the Oracle ERP system.

• Users can schedule appointments, meetings, or events through the ERP Booking module.

• The system helps in optimizing resource utilization and avoiding conflicts in scheduling.

• ERP Booking at Oracle can streamline operations and improve efficiency i...read more

Ohm's law states that the current flowing through a conductor is directly proportional to the voltage across it, and inversely proportional to the resistance of the conductor.

• Ohm's law is expressed as V = I * R, where V is voltage, I is current, and R is resistance.

• It helps in calculating the relationship between voltage, current, and resistance in an electrical circuit.

• For example, if a circuit has a voltage of 12 volts and a resistance of 4 ohms, the current flowing through...read more

Meter is a unit of length in the metric system, equal to 100 centimeters or approximately 39.37 inches.

• Meter is the base unit of length in the metric system.

• It is equal to 100 centimeters or approximately 39.37 inches.

• Commonly used for measuring distances, heights, and lengths.

• Examples: A standard ruler is typically marked in centimeters and meters.

• Example: The height of a person can be measured in meters.

Poka Yoke is a Japanese term for mistake-proofing or error prevention in manufacturing processes.

• Poka Yoke aims to prevent errors by designing processes in a way that makes mistakes impossible or easily detectable.

• Examples of Poka Yoke include using color coding for different parts, designing shapes that only fit together in the correct way, and adding sensors to detect errors.

• It helps in improving quality, reducing defects, and increasing efficiency in production.