40+ QASolvers Interview Questions and Answers

Types of ball screws, checking and removing backlash, parameters to check for spindle breakdown

• Types of ball screws include precision ground, rolled, and miniature ball screws

• To check backlash in a ball screw, use a dial indicator to measure the axial movement of the screw without rotation

• Backlash in a ball screw can be removed by adjusting the preload or replacing worn components

• Parameters to check for spindle breakdown include vibration levels, temperature, lubrication stat...read more

General electrical accessories include switches, outlets, dimmers, and junction boxes.

• Switches control the flow of electricity to a circuit or device.

• Outlets provide a point of connection for electrical devices.

• Dimmers allow for adjustable lighting levels.

• Junction boxes are used to connect and protect wires.

• Other accessories include circuit breakers, fuses, and wire connectors.

Pump function refers to the operation of a pump, which is a device that moves fluids through mechanical action. 5S and TPM are methodologies for improving efficiency and maintenance in a workplace.

• Pump function involves the movement of fluids through mechanical action, such as in a water pump or oil pump.

• There are different types of pumps, including centrifugal pumps, positive displacement pumps, and submersible pumps.

• 5S is a workplace organization method that stands for Sort...read more

Types of gearboxes include manual, automatic, and CVT. Common thread types are metric, imperial, and pipe threads. M8 bolt requires 6.8mm drill and M8 tap. Types of bearing assembly include ball bearings, roller bearings, and sleeve bearings.

• Types of gearboxes: manual, automatic, CVT

• Types of threads: metric, imperial, pipe threads

• For M8 bolt: 6.8mm drill and M8 tap

• Types of bearing assembly: ball bearings, roller bearings, sleeve bearings

Hot rolling is a process of shaping and sizing sheet or material by feeding it into an oil-fired furnace and rolling it through multiple stands.

• Hot rolling is used to produce sheets, plates, and coils of various thicknesses and sizes.

• The process involves heating the material above its recrystallization temperature to make it more malleable.

• The material is then passed through a series of rollers to achieve the desired shape and size.

• Hot rolling is commonly used in the producti...read more

The least count of a 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 main scale and the vernier scale.

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

• For example, if the smallest division on the main scale is 0.1 mm and the vernier scale has 10 divisions, the least count would be 0.01 mm.

The rejection and rework percentage in the current industry varies depending on the sector and the quality control measures implemented.

• The rejection and rework percentage can be affected by factors such as the type of product, the manufacturing process, and the quality control measures in place.

• In the automotive industry, the rejection and rework percentage can be as low as 1% for some manufacturers, while others may have a higher percentage due to more complex production pr...read more

Electricity is a form of energy resulting from the movement of charged particles.

• Electricity is the flow of electrons through a conductor.

• It can be generated through various means such as chemical reactions, electromagnetic induction, and solar power.

• Electricity has many practical applications such as lighting, heating, and powering electronic devices.

• It is important to understand the fundamentals of electricity in order to work safely with electrical systems.

The types of defects in bearings include wear, corrosion, pitting, cracking, and misalignment.

• Wear: Occurs due to friction and can lead to loss of material and increased clearance.

• Corrosion: Caused by chemical reactions, leading to surface degradation and reduced performance.

• Pitting: Localized surface damage caused by fatigue or contaminants, resulting in roughness and reduced load-carrying capacity.

• Cracking: Can occur due to excessive stress, improper installation, or materi...read more

There are 1000 microns in 1 mm. The least value of vernier is 0.01 mm.

• 1 mm is equal to 1000 microns.

• Micron is a unit of length equal to one millionth of a meter.

• Vernier is a measuring scale used in precision instruments.

• The least value of vernier is the smallest measurement that can be accurately read on the scale.

• In this case, the least value of vernier is 0.01 mm.

Yes, I have experience in autonomous maintenance and I expect others to follow the maintenance role description.

• I have implemented autonomous maintenance in my previous role and trained the team on its importance.

• I expect others to take ownership of their equipment and perform routine checks to prevent breakdowns.

• Following the maintenance role description is crucial to ensure equipment reliability and minimize downtime.

• I believe in continuous improvement and encourage feedbac...read more

Thermodynamics laws, types of gears and bearings

• Thermodynamics laws include the first law (conservation of energy), second law (entropy always increases), and third law (absolute zero is unattainable)

• Types of gears include spur, helical, bevel, worm, and rack and pinion

• Types of bearings include ball bearings, roller bearings, and plain bearings

• Gears and bearings are commonly used in machinery and mechanical systems

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

• The least count is determined by the number of divisions on the micrometer scale and the pitch of the screw.

• It is usually expressed in micrometers or millimeters.

• For example, if a micrometer has 50 divisions on the scale and the pitch of the screw is 0.5 mm, then the least count would be 0.01 mm (0.5 mm / 50 divisions).

Handling employees requires effective communication, clear expectations, and fair treatment.

• Establish clear expectations and goals

• Provide regular feedback and recognition

• Encourage open communication and active listening

• Address conflicts and issues promptly and fairly

• Lead by example and maintain a positive attitude

• Provide opportunities for growth and development

• Ensure fair treatment and equal opportunities for all employees

Electric current can cause chemical changes in substances it passes through.

• Electric current can cause electrolysis, which is the breakdown of a substance into its constituent elements or ions.

• This can be seen in the process of electroplating, where a metal is deposited onto a surface by passing an electric current through a solution containing ions of the metal.

• Electric current can also cause corrosion, as seen in the rusting of iron due to the reaction with oxygen in the pr...read more

My favorite subject in diploma is Electrical Engineering.

• I enjoy learning about electrical circuits and systems.

• I find the principles of electromagnetism fascinating.

• I am interested in power generation and distribution.

• I have a passion for designing and troubleshooting electrical systems.

• I excel in subjects like electrical machines and power electronics.

Two-stroke engines have power strokes every revolution, while four-stroke engines have power strokes every other revolution.

• Two-stroke engines have a simpler design with fewer moving parts.

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

• Two-stroke engines are commonly used in small power tools and motorcycles.

• Four-stroke engines are typically found in cars, trucks, and larger machinery.

Electricians require a variety of tools to perform their job effectively.

• Basic hand tools such as pliers, screwdrivers, wire strippers, and wrenches

• Power tools such as drills, saws, and grinders

• Testing equipment such as multimeters and voltage testers

• Safety equipment such as gloves, safety glasses, and hard hats

• Specialized tools such as conduit benders and fish tapes

• Examples of brands include Klein Tools, Milwaukee, and DeWalt

Bearings are mechanical components that reduce friction between moving parts.

• Bearings allow for smooth and efficient movement of rotating or linear parts.

• They consist of an outer and inner ring with rolling elements in between.

• Common types include ball bearings, roller bearings, and needle bearings.

• Proper lubrication is essential for their longevity and performance.

• Bearings are used in a wide range of applications, from cars and airplanes to industrial machinery and household...read more

A type of bearing is a device that supports a rotating shaft and reduces friction between moving parts.

• Bearings are used in various mechanical systems to enable smooth and efficient movement.

• There are several types of bearings, including ball bearings, roller bearings, and plain bearings.

• Ball bearings use balls to reduce friction and support radial and axial loads.

• Roller bearings use cylindrical or tapered rollers to support heavy loads.

• Plain bearings, also known as bushings,...read more

There are various types of bearings used in production lines such as ball bearings, roller bearings, and needle bearings.

• Ball bearings are the most common type used in production lines.

• Roller bearings are used for heavier loads and higher speeds.

• Needle bearings are used for applications with limited space and high load capacity.

• Other types of bearings include spherical bearings, thrust bearings, and tapered roller bearings.

• The type of bearing used depends on the specific appl...read more

I have a strong understanding of manufacturing industries, including processes, technologies, and market trends.

• Knowledge of various manufacturing processes such as lean manufacturing, Six Sigma, and just-in-time production

• Understanding of supply chain management and logistics in manufacturing

• Awareness of industry 4.0 technologies like IoT, AI, and automation in manufacturing

• Familiarity with quality control standards and certifications in manufacturing

• Experience working with ...read more

Face grinding is a machining process used to achieve smooth and precise surfaces on the face of a workpiece.

• Face grinding involves removing material from the face of a workpiece using a grinding wheel.

• It is commonly used in manufacturing industries to improve the flatness, parallelism, and surface finish of components.

• The process can be performed manually or using automated grinding machines.

• Face grinding is often used in the production of gears, bearings, and other precision...read more

Chemical properties refer to the behavior of materials in different chemical environments, while mechanical properties refer to how materials respond to applied forces.

• Chemical properties include corrosion resistance, chemical stability, and reactivity with other substances.

• Mechanical properties include strength, hardness, ductility, and toughness.

• Different grades of casting materials will have varying chemical and mechanical properties based on their composition and processi...read more

Grinding process involves removing material from a workpiece using an abrasive wheel or belt.

• Grinding is a finishing process used to improve surface finish, accuracy, and dimensional tolerances.

• The principle of grinding involves the use of an abrasive material to remove material from the workpiece.

• The grinding wheel or belt rotates at high speed, while the workpiece is held stationary or fed into the rotating wheel.

• The grinding process can be used for a variety of materials, ...read more

Productivity can be increased by setting clear goals, providing proper training, and implementing efficient processes.

• Set clear and achievable goals for employees

• Provide proper training and resources to employees

• Implement efficient processes and eliminate unnecessary steps

• Encourage teamwork and collaboration

• Recognize and reward employees for their hard work and achievements

Manufacturing of gears involves various processes including grinding which can be done through different types of grinding machines.

• Gears can be manufactured through processes like hobbing, shaping, milling, and grinding.

• Grinding is the process of removing material from a workpiece using a grinding wheel.

• Types of grinding machines used for gear manufacturing include cylindrical grinding machines, centerless grinding machines, and gear grinding machines.

• Gear grinding machines ...read more

Bearings are used to reduce friction between two moving parts. Metal type is important for bearing performance.

• Metal type affects bearing strength, durability, and resistance to corrosion.

• Common bearing metals include steel, bronze, and ceramic.

• Steel bearings are strong and durable, but can corrode in certain environments.

• Bronze bearings are self-lubricating and resistant to corrosion, but not as strong as steel.

• Ceramic bearings are lightweight and have low friction, but are ...read more

A bearing is a mechanical component that supports the rotating shaft of a machine, allowing it to move smoothly and reduce friction.

• Bearings are used in various applications such as automobiles, industrial machinery, and household appliances.

• They consist of an inner and outer ring with rolling elements (balls or rollers) in between.

• Bearings can be classified into different types such as ball bearings, roller bearings, and plain bearings.

• They help in reducing friction, support...read more

Final year project was on automation of production line. Last company worked on implementing lean manufacturing principles.

• Final year project involved designing and implementing automation systems for a production line

• Last company focused on implementing lean manufacturing principles to improve efficiency and reduce waste

• Implemented visual management tools and standardized work procedures to streamline production processes

Alloy elements in steel making affect properties like strength, hardness, corrosion resistance, and more.

• Carbon increases hardness and strength

• Chromium improves corrosion resistance

• Nickel enhances toughness and ductility

• Manganese promotes hardenability

• Molybdenum increases strength at high temperatures

• Vanadium improves wear resistance

• Silicon helps deoxidize the steel

The least count of a CMM (Coordinate Measuring Machine) is the smallest increment that can be measured by the machine.

• The least count of a CMM is typically determined by the resolution of its measuring system.

• For example, if a CMM has a resolution of 0.001 mm, then its least count would be 0.001 mm.

• The least count is important for ensuring accurate and precise measurements in quality control processes.

Gear boxes are mechanical devices used to increase or decrease the speed or torque of a motor.

• Types of gear boxes include spur gear boxes, helical gear boxes, bevel gear boxes, worm gear boxes, and planetary gear boxes.

• Spur gear boxes have straight teeth and are used for low-speed applications.

• Helical gear boxes have angled teeth for smoother operation and higher speeds.

• Bevel gear boxes have cone-shaped gears for changing the direction of power transmission.

• Worm gear boxes ha...read more

Production process involves converting raw materials into finished products through a series of steps.

• Designing the product and creating a production plan

• Sourcing raw materials and quality checking them

• Manufacturing the product through various processes like casting, forging, machining, etc.

• Assembling the product and testing it for quality

• Packaging and shipping the finished product

An induction motor is an AC electric motor in which power is supplied to the rotor by electromagnetic induction.

• Induction motors are widely used in various applications, including industrial machinery, appliances, and transportation systems.

• They work on the principle of electromagnetic induction, where a rotating magnetic field is created in the stator, inducing current in the rotor.

• The rotor of an induction motor can be either squirrel cage or wound type.

• Squirrel cage induct...read more

Bearings are used to reduce friction between moving parts in machinery, allowing for smooth rotation or linear motion.

• Bearings are commonly used in vehicles, industrial machinery, and household appliances.

• They help support and guide rotating or linear moving parts, reducing friction and wear.

• Examples include ball bearings, roller bearings, and plain bearings.

• Bearings can also be used in applications such as electric motors, pumps, and fans.

Material heat treatment types include annealing, tempering, quenching, and normalizing.

• Annealing: heating the material to a specific temperature and then slowly cooling it to relieve internal stresses and increase ductility.

• Tempering: heating the material to a moderate temperature and then cooling it to improve toughness and reduce brittleness.

• Quenching: rapid cooling of the material to increase hardness by forming martensite.

• Normalizing: heating the material to a specific te...read more

CNC stands for Computer Numerical Control. It is a manufacturing process that uses computers to control machine tools.

• CNC is used in various industries such as automotive, aerospace, and electronics.

• There are different types of CNC machines, including milling machines, lathes, and routers.

• CNC machines can perform precise and complex operations, such as cutting, drilling, and shaping materials.

• CNC programming involves creating instructions for the machine to follow, specifying...read more

Bearings are mechanical components that allow for smooth rotation or movement between two parts.

• Types of bearings include ball bearings, roller bearings, plain bearings, and fluid bearings.

• Ball bearings use balls to reduce friction between two surfaces.

• Roller bearings use cylindrical rollers to support radial and axial loads.

• Plain bearings have a sliding surface instead of balls or rollers.

• Fluid bearings use a thin layer of liquid or gas to support the moving parts.

Steel making process involves converting iron ore into steel through various methods like blast furnace or electric arc furnace.

• Iron ore is first mined and then processed to remove impurities.

• The purified iron ore is then melted in a blast furnace with coke and limestone to remove impurities and create molten iron.

• The molten iron is then converted into steel through processes like basic oxygen furnace or electric arc furnace.

• Alloying elements can be added to the steel to achi...read more