40+ Quality Assurance Quality Control Engineer Interview Questions and Answers

Carbon filters are used in WTP to remove organic compounds, chlorine, and other impurities from water.

• Carbon filters are effective in removing organic compounds, chlorine, and other impurities from water.

• They are commonly used in water treatment plants (WTP) to improve the taste and odor of water.

• Carbon filters can also remove certain heavy metals and volatile organic compounds (VOCs) from water.

• They are often used as a final step in the water treatment process to ensure high...read more

Yield point is the stress at which a material begins to deform plastically.

• Yield point is the point on a stress-strain curve where the material starts to deform plastically.

• It is the stress at which the material no longer behaves elastically.

• The yield point is important in determining the strength and ductility of a material.

• The yield point can be determined by plotting a stress-strain curve and finding the point where the curve starts to deviate from a straight line.

• Examples...read more

Passive and active electrical components are two types of components used in electronic circuits.

• Passive components do not require an external power source to function, such as resistors, capacitors, and inductors.

• Active components require an external power source to function and can amplify or control the electrical signal, such as transistors, diodes, and integrated circuits.

• Passive components are typically used to control the flow of current or store energy, while active c...read more

Ozonation is a chemical process that uses ozone gas to disinfect water while chlorination uses chlorine gas.

• Ozonation is more effective in removing certain contaminants like pesticides and pharmaceuticals.

• Chlorination can produce harmful byproducts like trihalomethanes.

• Ozonation is more expensive than chlorination.

• Chlorination is more commonly used in water treatment plants.

• Ozonation is a faster process than chlorination.

Workability refers to the ease of handling and placing concrete, while durability refers to its ability to withstand environmental and service conditions.

• Workability is influenced by factors such as water content, aggregate size, and admixtures.

• Workable concrete can be easily mixed, transported, and placed without segregation or excessive bleeding.

• Durability is affected by factors like the water-cement ratio, cement content, and curing conditions.

• Durable concrete can resist d...read more

Legal bodies for PDW manufacturing include FDA, EMA, and other regulatory agencies.

• FDA (Food and Drug Administration) in the US

• EMA (European Medicines Agency) in Europe

• Other regulatory agencies in different countries

• Compliance with Good Manufacturing Practices (GMP) and other quality standards

Essential qualities of a QA QC engineer in welding sector

• In-depth knowledge of welding codes and standards

• Ability to interpret welding drawings and specifications

• Strong attention to detail and ability to identify defects

• Excellent communication and documentation skills

• Experience in non-destructive testing techniques

• Knowledge of welding processes and equipment

• Ability to work collaboratively with other departments

• Strong problem-solving skills

• Understanding of safety regulations a...read more

The 7 QC tools are basic quality control tools used to analyze and solve quality-related issues in manufacturing processes.

• The 7 QC tools include check sheets, control charts, histograms, Pareto charts, scatter diagrams, cause-and-effect diagrams, and flowcharts.

• These tools help in identifying and solving quality problems in a systematic manner.

• For example, a control chart can be used to monitor a process over time and detect any variations that may affect quality.

• Regular tra...read more

The density of DI, MS, and HDPE pipes varies depending on their composition and manufacturing process.

• Density is a measure of mass per unit volume.

• DI (Ductile Iron) pipes have a density of approximately 7.2 g/cm³.

• MS (Mild Steel) pipes have a density of around 7.85 g/cm³.

• HDPE (High-Density Polyethylene) pipes have a density ranging from 0.93 to 0.97 g/cm³.

• The density of pipes is an important factor in determining their strength and suitability for different applications.

The pressure range of DI and HDPE pipes varies depending on their size and application.

• The pressure range of DI (Ductile Iron) pipes typically ranges from 150 psi to 350 psi.

• HDPE (High-Density Polyethylene) pipes have a pressure range of 100 psi to 300 psi.

• The pressure rating of pipes also depends on their diameter and wall thickness.

• For example, a 4-inch DI pipe with a wall thickness of 0.25 inches may have a pressure rating of 250 psi.

• It is important to consult the manufact...read more

Engine twining occurs due to improper timing of the engine's components, leading to reduced performance and potential damage.

• Engine twining can occur when the timing belt or chain is not properly aligned with the camshaft and crankshaft.

• This misalignment can result in the valves opening and closing at the wrong time, causing the engine to run inefficiently.

• Seat in engine twining time refers to the process of adjusting the timing of the engine components to ensure proper opera...read more

2-cylinder engines are typically smaller, lighter, and more fuel efficient, while 4-cylinder engines offer more power and smoother operation.

• 2-cylinder engines are often used in smaller vehicles like motorcycles and scooters for their compact size and efficiency.

• 4-cylinder engines are commonly found in larger vehicles like cars and trucks for their power and smoother operation.

• 4-cylinder engines tend to have better balance and less vibration compared to 2-cylinder engines.

• 2-c...read more

Rotating for cylinder degree in engine refers to the angle at which the cylinder rotates during the engine's operation.

• Rotating for cylinder degree in engine is related to the movement of the piston within the cylinder.

• It is measured in degrees of rotation, indicating the position of the piston within the cylinder.

• The degree of rotation affects the timing of the engine's combustion process.

• Properly timed rotation ensures efficient engine performance and power output.

4-stroke engine and diesel Otto cycle explained

• A 4-stroke engine completes a cycle in four strokes: intake, compression, power, and exhaust

• Diesel Otto cycle is a thermodynamic cycle used in diesel engines

• Diesel Otto cycle consists of four processes: intake, compression, power, and exhaust

• The main difference between gasoline and diesel engines is the way fuel is ignited

• Gasoline engines use spark plugs to ignite the fuel, while diesel engines use compression to ignite the fuel

Spark plugs are used in gasoline engines to ignite the air-fuel mixture, while injectors are used to spray fuel into the combustion chamber.

• Spark plugs create a spark to ignite the air-fuel mixture in gasoline engines.

• Injectors are used to spray fuel into the combustion chamber.

• Spark plugs are typically found in gasoline engines, while injectors are used in both gasoline and diesel engines.

• Spark plugs require high voltage to create a spark, while injectors require high pressu...read more

CCP and OPRP are critical control points and operational prerequisite programs respectively in PDW line.

• CCP is a point in the process where control can be applied to prevent, eliminate, or reduce a hazard to an acceptable level.

• OPRP is a prerequisite program that controls a significant hazard that is not controlled by the CCP.

• Examples of CCP in PDW line are pasteurization, filtration, and bottling.

• Examples of OPRP in PDW line are cleaning and sanitation, pest control, and mai...read more

Many e-commerce companies use software for various functions such as inventory management, order processing, and customer relationship management.

• Most e-commerce companies use software for inventory management to track stock levels and optimize supply chain processes.

• Order processing software is commonly used to automate the order fulfillment process and streamline operations.

• Customer relationship management (CRM) software is essential for managing customer interactions, trac...read more

The question is related to construction materials and techniques.

• Grade of concrete refers to its strength and durability. It is denoted by a number such as M20, M30, etc.

• Curing is the process of maintaining moisture and temperature conditions to allow concrete to develop its full strength and durability. Types of curing include water curing, steam curing, and chemical curing.

• Type of steel used in construction includes mild steel, high tensile steel, and stainless steel. The c...read more

The last company product process details involved the use of quality tools and compliance with IATF 16949:2016.

• The product process details included various stages such as design, manufacturing, and testing.

• Quality tools like Six Sigma, Statistical Process Control (SPC), and Failure Mode and Effects Analysis (FMEA) were used to ensure product quality.

• IATF 16949:2016 is a quality management standard specifically for the automotive industry.

• It focuses on continuous improvement, ...read more

The 14th law of management is the law of balance.

• The law of balance states that there should be a balance between the needs of the organization and the needs of the individuals working in it.

• It emphasizes the importance of maintaining a balance between the different aspects of management such as planning, organizing, staffing, directing, and controlling.

• The law of balance also stresses the need for a balance between short-term and long-term goals, as well as between efficienc...read more

To change font style, use CSS properties like font-family, font-size, font-weight, etc.

• Use the 'font-family' property to specify the font style

• Use the 'font-size' property to specify the size of the font

• Use the 'font-weight' property to specify the thickness of the font

• Use the 'font-style' property to specify the style of the font (italic, oblique, normal)

Concurrent force is the combination of two or more forces acting on a single point simultaneously.

• Concurrent force is a vector quantity.

• The resultant of concurrent forces can be found using the parallelogram law of vector addition.

• Examples of concurrent forces include the forces acting on a seesaw or a crane.

• The point of intersection of the concurrent forces is called the point of concurrency.

I am open to discussing a competitive salary based on my experience and the responsibilities of the role.

• I am looking for a fair and reasonable compensation package

• I am open to negotiation based on the job requirements and my experience

• I am looking for a salary that reflects the market value for this position

• I am willing to consider other benefits such as health insurance, retirement plans, and vacation time

There are thousands of types of steels, but they can be broadly categorized into carbon steels, alloy steels, and stainless steels.

• Carbon steels: contain varying amounts of carbon, with low, medium, and high carbon steels.

• Alloy steels: contain other elements such as nickel, chromium, and manganese to improve properties like strength and corrosion resistance.

• Stainless steels: contain chromium for corrosion resistance, with different grades like 304, 316, and 430.

Java is a high-level programming language known for its portability, security, and object-oriented features.

• Java is platform-independent, meaning it can run on any device with a Java Virtual Machine (JVM)

• It is known for its security features like sandboxing to prevent malicious code execution

• Java is object-oriented, allowing for modular and reusable code

• It supports multithreading, allowing for concurrent execution of tasks

• Popular Java frameworks include Spring, Hibernate, and...read more

2-stroke engines have power strokes every revolution, while 4-stroke engines have power strokes every other revolution.

• 2-stroke engines have a simpler design with fewer moving parts compared to 4-stroke engines.

• 2-stroke engines require a mix of oil and fuel for lubrication, while 4-stroke engines have a separate oil reservoir.

• 2-stroke engines are lighter and produce more power for their size, but are less fuel efficient and emit more pollution compared to 4-stroke engines.

• Exa...read more

There are several types of beams used in construction, including I-beams, H-beams, and T-beams.

• I-beams are also known as W-beams and are shaped like an I

• H-beams are shaped like an H and are commonly used in construction

• T-beams are shaped like a T and are used in construction for bridges and other structures

• Other types of beams include box beams, channel beams, and angle beams

Parallelogram law states that the sum of the squares of the diagonals of a parallelogram is equal to the sum of the squares of its sides.

• Parallelogram law is used in vector addition and subtraction.

• It is also known as the parallelogram identity.

• The law can be expressed as: AB^2 + BC^2 + 2(AB)(BC)cos(θ) = AC^2

• Where AB, BC, and AC are sides of the parallelogram and θ is the angle between AB and BC.

• For example, if AB = 3 and BC = 4, and the angle between them is 60 degrees, then...read more

The starting system is essential for initiating the engine's operation by providing the necessary power to the engine components.

• The starting system includes components such as the starter motor, starter solenoid, battery, and ignition switch.

• The starter motor converts electrical energy from the battery into mechanical energy to turn the engine's crankshaft.

• The starter solenoid is responsible for engaging the starter motor with the engine's flywheel.

• The battery provides the i...read more

PPE stands for Personal Protective Equipment, 8D is a problem-solving methodology, RTJ refers to Ring Type Joint, PPC stands for Production Part Approval Process.

• PPE: equipment worn to minimize exposure to hazards (e.g. gloves, goggles)

• 8D: Eight Disciplines problem-solving method (e.g. root cause analysis)

• RTJ: type of gasket used in high-pressure applications (e.g. oil and gas pipelines)

• PPC: process to ensure production parts meet quality standards before mass production

log9 is a software tool used for log management and analysis.

• log9 helps in collecting, analyzing, and monitoring log data from various sources.

• It provides real-time alerts and notifications for any anomalies or issues in the logs.

• Users can search, filter, and visualize log data to identify trends and patterns.

• log9 can be integrated with other tools and platforms for seamless log management.

• It helps in troubleshooting and debugging software applications by analyzing log data.

Vernier list count is a method used in quality control to track and count the number of items in a list.

• Vernier list count is a technique used to accurately count items in a list or inventory.

• It involves using a vernier scale or caliper to measure and count the items with precision.

• This method is commonly used in manufacturing and quality control processes to ensure accurate inventory management.

• For example, in a production line, a QA engineer may use vernier list count to ve...read more

Piping refers to a system of pipes used to transport fluids or gases from one place to another.

• Piping is commonly used in industries such as oil and gas, chemical, and pharmaceutical.

• It can be made of various materials such as steel, copper, PVC, and plastic.

• Piping systems can include fittings, valves, and other components to control the flow of the fluid or gas.

• Proper design and installation of piping is crucial for ensuring safety and efficiency in industrial processes.

Welding is a process of joining two or more metal pieces together using heat and/or pressure.

• Welding involves melting the base metal and adding a filler material to create a strong bond.

• Common welding techniques include arc welding, MIG welding, TIG welding, and spot welding.

• Proper welding techniques are essential to ensure structural integrity and quality of the weld.

• Welding defects such as porosity, cracks, and incomplete penetration can compromise the weld's strength.

• Quali...read more

A battery is a device that stores chemical energy and converts it into electrical energy.

• A battery typically consists of one or more electrochemical cells, which are connected in series or parallel to increase voltage or capacity.

• Common types of batteries include alkaline, lithium-ion, and lead-acid batteries.

• Batteries are used in various applications such as powering electronic devices, vehicles, and backup power systems.

• The capacity of a battery is measured in ampere-hours ...read more

TPM stands for Total Productive Maintenance, a proactive approach to maintenance that aims to maximize equipment effectiveness and minimize downtime.

• TPM focuses on empowering operators to take ownership of equipment maintenance.

• It involves preventive maintenance, autonomous maintenance, and continuous improvement.

• TPM aims to eliminate the 6 big losses: breakdowns, setup and adjustment, idling and minor stoppages, reduced speed, defects, and yield losses.

• Example: Implementing ...read more

Quality is the degree of excellence of a product or service as perceived by the customer.

• Quality is meeting or exceeding customer expectations

• It involves consistency, reliability, and durability

• Quality is achieved through effective quality assurance and quality control processes

• Examples: meeting specifications, absence of defects, customer satisfaction

Calibration is the process of comparing measurements of an instrument or device to a known standard to ensure accuracy.

• Calibration involves adjusting the instrument or device to align with the standard.

• It is important for maintaining accuracy and reliability in measurements.

• Calibration is typically done regularly to ensure consistent results.

• Examples include calibrating thermometers, scales, and pressure gauges.

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 least count represents the a...read more