20+ KNAV Interview Questions and Answers

The final finishing of a tyre involves several processes to enhance its appearance and performance.

• The final finishing of a tyre includes processes like buffing, painting, and branding.

• Buffing is done to remove any imperfections on the surface of the tyre.

• Painting is done to give the tyre its final color and appearance.

• Branding involves adding the manufacturer's logo, name, and other relevant information on the tyre.

• The final finishing also includes quality checks to ensure t...read more

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

• The least count is determined by the number of divisions on the vernier scale.

• It is usually 0.1 mm or 0.02 mm for a standard vernier caliper.

• For example, if the main scale reading is 5 mm and the vernier scale reading is 0.02 mm, the total measurement is 5.02 mm.

There are various operations that can be performed on a lathe machine, including turning, facing, drilling, boring, knurling, and threading.

• Turning - used to create cylindrical parts

• Facing - used to create a flat surface at the end of a workpiece

• Drilling - used to create holes in the workpiece

• Boring - used to enlarge existing holes

• Knurling - used to create a textured pattern on the surface of the workpiece

• Threading - used to create threads on the workpiece

Scrap tyres can be found through various sources such as tire recycling centers, scrapyards, online marketplaces, and local classified ads.

• Visit tire recycling centers or scrapyards where discarded tyres are collected and processed.

• Search online marketplaces like Craigslist or eBay for individuals selling scrap tyres.

• Check local classified ads in newspapers or online platforms for people offering scrap tyres.

• Contact automobile repair shops or tire dealerships to inquire about...read more

Training production work involves providing hands-on experience, guidance, and continuous learning opportunities.

• Create a structured training program that covers all aspects of production work.

• Provide hands-on experience by allowing trainees to work on real production tasks under supervision.

• Offer guidance and mentorship to trainees, helping them understand best practices and overcome challenges.

• Encourage continuous learning through workshops, seminars, and online resources.

• M...read more

An induction motor is a type of AC motor where power is supplied to the rotor by electromagnetic induction.

• Induction motors are commonly used in various industrial applications due to their simplicity and reliability.

• They consist of a stator (stationary part) and a rotor (rotating part).

• When AC power is supplied to the stator windings, a rotating magnetic field is produced which induces currents in the rotor windings, causing it to rotate.

• The speed of an induction motor is sl...read more

To convert 230V AC to 24V DC, a rectifier circuit can be used.

• Use a step-down transformer to reduce the voltage from 230V AC to a lower voltage.

• Connect the output of the transformer to a rectifier circuit to convert AC to DC.

• Use a voltage regulator to stabilize the output at 24V DC.

• Examples of rectifier circuits include full-wave rectifiers and bridge rectifiers.

Tonnage calculation formula depends on the type of material being measured.

• For rectangular objects, the formula is length x width x height x density

• For cylindrical objects, the formula is pi x radius squared x height x density

• Density is measured in kilograms per cubic meter

• Tonnage is calculated in metric tons

One quintal is equal to 100 kg.

• One quintal is a unit of weight commonly used in agriculture and trade.

• It is equal to 100 kilograms or 220.46 pounds.

• The term 'quintal' is derived from the Latin word 'quintus' meaning 'fifth', as it was originally defined as one-fifth of a hundredweight.

Hook's law states that the force needed to extend or compress a spring by a certain distance is directly proportional to that distance.

• Force is directly proportional to extension or compression

• Limitation: Only applicable to linear elastic materials

• Does not hold true for materials that exhibit plastic deformation

• Example: Stretching a rubber band follows Hook's law until it reaches its elastic limit

GST is a tax system in India. GST R1 3b is a form for filing returns. Export involves containers, CFT duties, and product classification.

• GST is a Goods and Services Tax system implemented in India in 2017

• GST R1 3b is a form used for filing monthly returns under GST

• Export involves various aspects such as containerization, calculation of CFT duties, and product classification

• Containers are used for transporting goods and come in various sizes such as 20ft, 40ft, etc.

• CFT duties ...read more

The purchase process involves several steps from PR (Purchase Requisition) to PO (Purchase Order).

• Purchase Requisition (PR) is created by the requesting department or individual.

• The PR is then reviewed and approved by the relevant authority.

• Once approved, the PR is sent to the purchasing department.

• The purchasing department evaluates the PR and identifies potential suppliers.

• Requests for quotations (RFQs) are sent to the selected suppliers.

• Suppliers submit their quotations in...read more

PLC stands for Programmable Logic Controller, it is a digital computer used for automation of electromechanical processes.

• PLC is used to control machinery in industries by programming it to perform specific tasks.

• It consists of input and output modules, a central processing unit, and a programming device.

• PLCs use ladder logic programming language to create programs for controlling processes.

• They are commonly used in manufacturing plants, power stations, and transportation sys...read more

Production refers to the process of creating goods and services using various resources and techniques.

• Production involves converting raw materials into finished products

• It includes planning, organizing, and controlling the manufacturing process

• Efficient production leads to increased productivity and profitability

• Examples include manufacturing cars, producing food items, and creating software

• Production can be done manually or through automation

Carbon grades are important in rubber compounding for achieving desired physical properties. Testing and troubleshooting are crucial.

• Carbon black is commonly used in rubber compounding to improve wear resistance and strength.

• Different grades of carbon black have varying particle sizes and surface areas, affecting properties like hardness and abrasion resistance.

• Physical testing includes measuring properties like tensile strength, elongation, and hardness.

• Chemical testing invo...read more

5S and OEE are lean manufacturing tools used to improve efficiency and productivity. Kaizen is a continuous improvement philosophy.

• 5S is a methodology for organizing and optimizing the workplace to reduce waste and improve safety.

• OEE (Overall Equipment Effectiveness) is a metric used to measure the efficiency of manufacturing equipment.

• Kaizen is a Japanese term meaning 'continuous improvement'. It involves making small, incremental changes to processes and systems to improve ...read more

Coffee makers, clocks, and doorbells are examples of household appliances.

• Coffee makers are used to brew coffee.

• Clocks are used to tell time.

• Doorbells are used to alert occupants of visitors.

Mass transfer is the movement of substances from one place to another.

• Mass transfer involves the movement of molecules or particles from one phase to another, such as from a gas to a liquid.

• It is important in various industrial processes like distillation, absorption, and extraction.

• Examples include the transfer of oxygen from air to blood in the lungs, or the separation of components in a chemical reaction.

Heat transfer is the process of energy moving from a warmer object to a cooler object.

• Heat transfer can occur through conduction, convection, or radiation.

• Conduction is the transfer of heat through direct contact between objects, like a metal spoon heating up in a hot drink.

• Convection is the transfer of heat through the movement of fluids, like boiling water in a pot.

• Radiation is the transfer of heat through electromagnetic waves, like the heat from the sun reaching the Earth...read more

Address the issue through communication, setting clear expectations, providing support and training, and if necessary, taking appropriate disciplinary action.

• Communicate with the dealer to understand the reasons for non-performance

• Set clear performance expectations and goals

• Provide necessary support, training, and resources to help improve performance

• Monitor progress closely and provide regular feedback

• If non-performance continues despite efforts, consider implementing discip...read more

Human resources is the department responsible for managing and developing an organization's workforce.

• Human resources is responsible for recruitment, hiring, and onboarding of employees.

• They handle employee benefits, compensation, and performance management.

• HR also ensures compliance with labor laws and regulations.

• They provide training and development opportunities for employees.

• HR plays a role in resolving conflicts and maintaining a positive work environment.

Programming of PLC involves writing code to control the operation of a programmable logic controller.

• PLC programming involves creating logic diagrams to represent the control process.

• Programming languages like ladder logic, function block diagram, and structured text are commonly used.

• Inputs and outputs are defined in the program to control the operation of machinery or processes.

• Programming of PLCs can be done using specialized software provided by the PLC manufacturer.

• Debug...read more

OE is Overall Equipment, OEE is Overall Equipment Effectiveness. OEE is a more comprehensive metric.

• OE measures the availability of equipment, while OEE measures availability, performance, and quality.

• OE only considers downtime, while OEE also considers speed loss and quality defects.

• OEE is a more comprehensive metric that provides a more accurate picture of equipment effectiveness.

• OEE is calculated as Availability x Performance x Quality.

• For example, if a machine is availabl...read more

Factors of production refer to the resources used in the production process.

• There are four main factors of production: land, labor, capital, and entrepreneurship.

• Land refers to natural resources like water, minerals, and forests.

• Labor refers to the human effort put into production.

• Capital refers to the tools, machinery, and buildings used in production.

• Entrepreneurship refers to the ability to organize and manage the other factors of production.

• The combination of these factor...read more

Vernier caliper least count is the smallest measurement that can be read on the scale of the caliper.

• 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 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.

• The least count is important for accurately measuring small di...read more

Micrometer is a precision measuring instrument used to measure small distances or thicknesses.

• Micrometer is commonly used in mechanical engineering for precise measurements.

• It consists of a calibrated screw and a scale to measure the distance traveled by the screw.

• Micrometers are used to measure dimensions of various mechanical components such as shafts, bores, and gaps.

• They provide accurate measurements up to the thousandth of an inch or hundredth of a millimeter.

• Micrometers...read more