70+ 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

Modal wise in-house parts planning involves optimizing production schedules for plasma and steel cutting at the plasma line.

• Utilize modal analysis to determine the most efficient production schedule for in-house parts planning

• Consider factors such as material availability, machine capacity, and order deadlines

• Implement just-in-time inventory management to reduce waste and improve efficiency

Gravitational force is the attraction between two masses, proportional to their mass and inversely proportional to the square of the distance.

• It is described by Newton's Law of Universal Gravitation.

• Formula: F = G * (m1 * m2) / r^2, where F is the gravitational force, G is the gravitational constant.

• Example: The Earth exerts a gravitational force on objects, causing them to fall.

• The Moon's gravitational pull affects ocean tides on Earth.

• Gravitational force keeps planets in or...read more

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.

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

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

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

The evaporator core is responsible for cooling and dehumidifying the air in the HVAC system of a vehicle.

• Receives refrigerant from the compressor

• Air passes over the evaporator core, cooling it down

• Heat is absorbed from the air, causing it to cool

• Moisture in the air condenses on the evaporator core, dehumidifying the air

• Cooled and dehumidified air is then blown into the vehicle's cabin

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

The selection process at Reliance Jio involves multiple stages to assess candidates' skills and fit for the organization.

• Application Submission: Candidates submit their resumes through the Jio careers portal.

• Initial Screening: HR reviews applications to shortlist candidates based on qualifications and experience.

• Aptitude Test: Shortlisted candidates may take an online aptitude test to evaluate their analytical skills.

• Technical Interview: Candidates undergo a technical intervi...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

Understanding powder coating thickness: minimum DFT is 20 microns; maximum varies based on application and material.

• DFT stands for Dry Film Thickness, crucial for durability and appearance.

• Minimum DFT of 20 microns ensures adequate protection against corrosion.

• Maximum DFT can reach up to 100 microns or more, depending on the coating type.

• For example, automotive parts may require higher DFT for better wear resistance.

• Excessive DFT can lead to issues like cracking or peeling.

Key words in manufacturing encompass essential concepts that drive efficiency, quality, and productivity in production processes.

• Lean Manufacturing: Focuses on minimizing waste while maximizing productivity. Example: Toyota Production System.

• Six Sigma: Aims to improve quality by identifying and removing causes of defects. Example: Motorola's quality improvement initiatives.

• Just-In-Time (JIT): Inventory strategy to increase efficiency and decrease waste by receiving goods only...read more

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

Zinc phosphate coating offers superior corrosion resistance compared to iron phosphate coating, which is primarily for surface preparation.

• Zinc phosphate provides better corrosion resistance than iron phosphate.

• Iron phosphate is often used as a pre-treatment before painting.

• Zinc phosphate coatings are commonly used in automotive and aerospace industries.

• Iron phosphate is typically used in household appliances and metal furniture.

• Zinc phosphate coatings can enhance adhesion of...read more

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

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

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.

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)

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

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

Four stroke engines have separate intake, compression, power, and exhaust strokes, while two stroke engines combine intake and exhaust in one stroke.

• Four stroke engines have valves for intake and exhaust, while two stroke engines use ports

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

• Two stroke engines have simpler design and are lighter in weight

• Examples: Four stroke - car engines, Two stroke - chainsaws

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)