200+ Quality Controller Interview Questions and Answers

Shear force is the force that acts perpendicular to the axis of the beam, while bending moment is the force that causes a beam to bend.

• Shear force is the force that acts perpendicular to the axis of the beam.

• Bending moment is the force that causes a beam to bend.

• Shear force and bending moment are important concepts in structural engineering.

• Shear force and bending moment diagrams are used to analyze the stresses in a beam.

• Shear force and bending moment are related to each oth...read more

Contamination on a medical device is checked through visual inspection, microbial testing, and chemical analysis.

• Perform visual inspection for any visible signs of contamination such as discoloration, debris, or foreign particles

• Conduct microbial testing to check for the presence of harmful microorganisms that can cause infections

• Use chemical analysis to detect any residues or contaminants that may be present on the device

• Follow established protocols and guidelines for contam...read more

Solvent technical specifications include boiling point, flash point, density, and solubility.

• Boiling point: The temperature at which the solvent changes from liquid to gas.

• Flash point: The lowest temperature at which the solvent can vaporize to form an ignitable mixture in air.

• Density: The mass per unit volume of the solvent.

• Solubility: The ability of the solvent to dissolve other substances.

• Example: Acetone has a boiling point of 56.05°C, flash point of -20°C, density of 0.7...read more

The 6 tools of quality control are essential techniques used in quality management to ensure products meet standards and customer expectations.

• Check sheets: Used to collect and analyze data in a systematic way.

• Control charts: Graphical tools to monitor processes over time.

• Histograms: Visual representation of data distribution.

• Pareto charts: Helps identify the most significant factors affecting quality.

• Scatter diagrams: Shows the relationship between two variables.

• Cause-and-ef...read more

Quality control ensures products meet standards. 5's and 4M are tools used in quality control.

• Quality control ensures products meet standards and customer expectations

• 5's is a tool used to organize and maintain a clean work environment

• 4M is a tool used to identify and address root causes of defects

• Joining quality control allows for a career in ensuring quality and continuous improvement

• Examples of quality control jobs include quality inspector, quality engineer, and quality m...read more

Immediately rinse the affected area with water for at least 15 minutes and seek medical attention if necessary.

• Rinse the affected area with water for at least 15 minutes

• Remove any contaminated clothing or jewelry

• Seek medical attention if necessary

The pH formula is used to calculate the acidity or alkalinity of a solution.

• pH = -log[H+]

• pH = -log[H3O+]

• pH = log(1/[H+])

• pH = log(1/[H3O+])

The mentioned tasks are part of the quality control process for incoming materials.

• Total quantity should match the purchase order and packing list.

• Material condition should be inspected for any damages or defects.

• Receiving process should be properly documented and recorded.

• Random sampling can be done to ensure quality of the materials.

• Any discrepancies should be reported and addressed immediately.

Transparent background is an important aspect of quality control and should be addressed by management.

• Transparent background is crucial for certain industries such as graphic design and printing.

• Lack of transparency can lead to errors in printing and design.

• Management should ensure that all employees are aware of the importance of transparent backgrounds and provide necessary training.

• Regular quality checks should be conducted to ensure that transparent backgrounds are being...read more

Capsules and tablets are two common forms of medication. Capsules are gelatin shells filled with medication, while tablets are compressed powder.

• Capsules are available in two types: hard and soft gelatin capsules.

• Tablets can be categorized into four types: compressed, coated, chewable, and effervescent.

• Capsules are easier to swallow than tablets for some people.

• Tablets can be scored to make it easier to break them in half.

• Capsules are often used for oil-based or liquid medica...read more

HPLC and GC are analytical techniques used in quality control. They employ different principles and detectors.

• HPLC stands for High-Performance Liquid Chromatography and GC stands for Gas Chromatography.

• HPLC separates compounds based on their interaction with a stationary phase and a mobile phase.

• GC separates compounds based on their volatility and interaction with a stationary phase and a carrier gas.

• HPLC detectors include UV-Vis, fluorescence, and mass spectrometry.

• GC detect...read more

Safety protocols in a laboratory include wearing appropriate personal protective equipment, following proper handling procedures, and maintaining a clean work environment.

• Always wear appropriate personal protective equipment such as gloves, lab coats, and safety goggles.

• Follow proper handling procedures for chemicals, equipment, and samples to prevent accidents.

• Maintain a clean work environment by regularly cleaning and disinfecting work surfaces and equipment.

• Properly label ...read more

Manufacturing industries involve the production of goods through the use of machinery, labor, and raw materials.

• Manufacturing industries typically involve the production of physical goods such as automobiles, electronics, textiles, and food products.

• These industries often utilize machinery, assembly lines, and automation to streamline production processes.

• Quality control is crucial in manufacturing industries to ensure that products meet standards and specifications before re...read more

A vernier caliper is a precision measuring tool used to measure internal and external dimensions with high accuracy.

• Ensure the caliper is clean and zeroed before use

• Close the jaws and check if the zero mark aligns with the main scale

• Measure the object by gently placing it between the jaws and reading the measurement

• For internal measurements, use the smaller jaws

• For external measurements, use the larger jaws

• Take multiple measurements to ensure accuracy

Real-time PCR is a technique used to monitor the amplification of a targeted DNA molecule during the PCR process.

• Real-time PCR allows for the detection and quantification of specific DNA sequences in real-time as the reaction is taking place.

• It is commonly used in research, clinical diagnostics, and forensic analysis.

• Real-time PCR is more sensitive and specific than traditional PCR methods.

• Examples of applications include gene expression analysis, pathogen detection, and gene...read more

The minimum compressive strength of M:25 concrete is a concern in quality control.

• The minimum compressive strength of M:25 concrete is specified in the design mix.

• It is important to ensure that the concrete meets or exceeds the specified minimum compressive strength.

• Testing of concrete samples is conducted to determine the compressive strength.

• The minimum compressive strength requirement may vary depending on the project specifications.

• Failure to meet the minimum compressive ...read more

CCP stands for Critical Control Points which are the points in food preparation where control can be applied to prevent, eliminate or reduce hazards.

• CCP are the points in the food preparation process where control can be applied to prevent, eliminate or reduce hazards

• They are the most important points in the process where failure to control can result in a food safety hazard

• Examples of CCP include cooking, chilling, and packaging

• CCP are identified through a hazard analysis an...read more

I would immediately check the power source, troubleshoot the issue, and notify the appropriate personnel for assistance.

• Check if the power source is connected properly

• Inspect for any blown fuses or tripped circuit breakers

• Contact maintenance or electrician for further assistance

Packing in pharmaceutical refers to the process of packaging drugs in suitable containers. Types include primary, secondary, and tertiary packaging.

• Primary packaging involves the direct contact of the drug with the container, such as blister packs or vials.

• Secondary packaging includes the packaging of primary containers, such as cartons or boxes.

• Tertiary packaging involves the packaging of secondary containers for transportation and storage, such as pallets or shrink wrap.

• The...read more

Concrete should be poured in pour strips after completing a certain section of formwork to prevent cracking and ensure proper curing.

• Concrete should be poured in pour strips after completing a certain section of formwork to prevent cracking.

• Pour strips are typically used in large concrete pours to control the placement and curing of the concrete.

• The timing of pour strips will depend on the size and complexity of the project, as well as the weather conditions.

• For example, in a...read more

Online quality refers to the level of excellence in products or services that are delivered through digital platforms.

• Online quality is measured by factors such as website functionality, user experience, and content accuracy.

• It is important to ensure that online products and services meet the same standards as their offline counterparts.

• Examples of online quality control measures include website testing, user feedback, and data analysis.

• Online quality is crucial for businesse...read more

A fuel injector is a component in an internal combustion engine that delivers fuel into the combustion chamber.

• Fuel injector is responsible for delivering the right amount of fuel at the right time for combustion

• CNG (Compressed Natural Gas) is a type of fuel used in some vehicles, while a fuel injector is a component that delivers fuel in liquid form

• The symbol for first angle of projection is a right angle triangle with a dot inside representing the point of projection

Dent mark and tray mark are terms used in quality control to describe specific types of marks or damage on products or trays.

• Dent mark refers to a small depression or indentation on a product or tray caused by impact or pressure.

• Tray mark refers to a visible mark or stain left on a tray due to contact with a product or external substance.

• Dent marks can be caused by mishandling, dropping, or improper storage of products or trays.

• Tray marks can be caused by spills, leaks, or th...read more

ISO stands for International Organization for Standardization.

• ISO is a non-governmental organization that develops and publishes international standards for various industries.

• It was founded in 1947 and is headquartered in Geneva, Switzerland.

• ISO has over 165 member countries and has published more than 23,000 standards.

• Some examples of ISO standards include ISO 9001 for quality management, ISO 14001 for environmental management, and ISO 27001 for information security managem...read more

FSSAI stands for Food Safety and Standards Authority of India.

• FSSAI is a regulatory body under the Ministry of Health and Family Welfare.

• It was established in 2006 to ensure food safety and hygiene in India.

• FSSAI sets standards for food products and regulates their manufacture, storage, distribution, sale, and import.

• It also issues licenses and registrations to food businesses.

• FSSAI has been instrumental in promoting food safety awareness and ensuring the availability of safe...read more

The 5s methodology consists of five types: Sort, Set in Order, Shine, Standardize, and Sustain.

• Sort: Organizing and removing unnecessary items from the workplace.

• Set in Order: Arranging items in a logical and efficient manner.

• Shine: Cleaning and maintaining cleanliness in the workplace.

• Standardize: Establishing consistent processes and procedures.

• Sustain: Ensuring the continuation of the 5s practices over time.

Materials used in production vary depending on the industry, but common examples include raw materials, chemicals, packaging materials, and equipment.

• Raw materials (e.g. metal, plastic, wood)

• Chemicals (e.g. solvents, adhesives)

• Packaging materials (e.g. boxes, labels)

• Equipment (e.g. machinery, tools)

Material can be checked through various methods including visual inspection, testing, and documentation review.

• Visual inspection involves examining the material for any defects or inconsistencies.

• Testing can include physical, chemical, or mechanical tests to ensure the material meets specifications.

• Documentation review involves verifying that all necessary documentation, such as certificates of analysis, are present and accurate.

• Sampling can also be used to check the material...read more

The number of bricks in one cubic metre depends on the size of the bricks.

• The size of the bricks determines the number of bricks in one cubic metre.

• Different sizes of bricks will result in different numbers of bricks in one cubic metre.

• To calculate the number of bricks, divide the volume of the cubic metre by the volume of one brick.

The role of the QC department in an industry is to ensure that products or services meet quality standards and customer expectations.

• Performing inspections and tests on raw materials, components, and finished products

• Identifying and resolving quality issues and non-conformities

• Implementing quality control procedures and processes

• Monitoring and analyzing quality data to identify trends and areas for improvement

• Collaborating with other departments to address quality concerns

• Ens...read more

I will analyze the product by conducting thorough inspections, testing for quality and functionality, and comparing against set standards.

• Conduct visual inspections to check for any defects or irregularities

• Perform functional testing to ensure the product works as intended

• Compare the product against established quality standards and specifications

• Use statistical analysis to identify any trends or patterns in product performance

• Seek feedback from end users or customers to gath...read more

The flow of water, methanol, and isopropanol can be determined by measuring their respective viscosities and densities.

• Viscosity and density of each liquid must be measured

• The flow rate can be calculated using the Hagen-Poiseuille equation

• The flow rate will vary depending on the pipe diameter and pressure

• The flow rate can be optimized by adjusting the pipe diameter and pressure

• The flow rate of each liquid can be compared to ensure consistency

Quality control is a process that ensures products or services meet specified requirements and standards.

• Quality control involves monitoring and inspecting products or services to identify defects or deviations from standards.

• It includes implementing corrective actions to address any issues found during the inspection process.

• Quality control aims to prevent defects, improve customer satisfaction, and maintain consistent quality.

• Various techniques and tools are used in quality...read more

Cement types vary based on composition and use, including OPC, PPC, and special cements for specific applications.

• Ordinary Portland Cement (OPC): Most common type, used for general construction.

• Portland Pozzolana Cement (PPC): Contains pozzolanic materials, enhances durability.

• Rapid Hardening Cement: Gains strength quickly, ideal for fast-track projects.

• Sulphate Resisting Cement: Used in environments with high sulphate exposure.

• White Cement: Aesthetic applications, used for d...read more

Concrete density typically ranges from 2,200 to 2,500 kg/m³, depending on the mix and materials used.

• Standard concrete density is about 2,400 kg/m³.

• Lightweight concrete can have a density as low as 1,600 kg/m³.

• High-density concrete can exceed 3,000 kg/m³, often used for radiation shielding.

• The density of concrete affects its strength, durability, and thermal properties.

Use a sorting algorithm like bubble sort or quicksort to sort the array without using built-in methods.

• Implement bubble sort algorithm to compare and swap elements in the array.

• Alternatively, implement quicksort algorithm to recursively divide and conquer the array.

• Ensure to handle edge cases like empty array or array with only one element.

Quality work is work that meets or exceeds the expected standards and requirements.

• Quality work is consistent and reliable.

• It is completed on time and within budget.

• It meets or exceeds customer expectations.

• It is free from defects and errors.

• It is continuously improved upon.

• Examples include products that are durable and functional, services that are efficient and effective, and processes that are streamlined and error-free.

Several factors affect the quality of a product.

• Raw materials

• Production process

• Equipment maintenance

• Quality control measures

• Packaging and storage

Yes, I can work well under pressure by staying organized, prioritizing tasks, and maintaining a positive attitude.

• I have experience working in fast-paced environments where quick decision-making and problem-solving skills are essential.

• I am able to stay calm and focused under pressure, ensuring that tasks are completed accurately and efficiently.

• I prioritize tasks effectively to meet deadlines and deliver high-quality results.

• I communicate effectively with team members to col...read more

Avogadro's number is a constant representing the number of constituent particles (usually atoms or molecules) in one mole of a substance.

• Avogadro's number is approximately 6.022 x 10^23.

• It is named after Italian scientist Amedeo Avogadro.

• It is used in chemistry to relate the mass of a substance to the number of atoms or molecules it contains.

The Beer-Lambert law relates the attenuation of light to the properties of the material through which the light is traveling.

• Also known as Beer's law or Lambert-Beer law

• Used in chemistry and physics to measure the concentration of a substance in a solution

• States that the absorbance of a substance is directly proportional to its concentration and the path length of the light through the material

• A = εcl, where A is absorbance, ε is the molar absorptivity, c is the concentration...read more

My strength lies in my attention to detail and ability to identify and resolve quality issues efficiently.

• Attention to detail in identifying quality issues

• Efficiently resolving quality issues

• Strong problem-solving skills

• Ability to work well under pressure

• Excellent communication skills

Yes, quarantine rooms are designated areas for isolating individuals who may have been exposed to infectious diseases.

• Quarantine rooms are used to prevent the spread of infectious diseases.

• They are typically equipped with negative air pressure systems to prevent airborne transmission.

• Medical staff and visitors must wear protective gear when entering quarantine rooms.

• Examples of situations where quarantine rooms may be used include outbreaks of Ebola, SARS, or COVID-19.

Injection storage requires proper temperature, light, and humidity control.

• Injections should be stored in a cool, dry place.

• Temperature should be maintained between 2-8°C for most injections.

• Some injections may require freezing temperatures.

• Light exposure should be minimized.

• Humidity should be controlled to prevent moisture damage.

• Expired injections should be disposed of properly.

• Storage conditions should be monitored and recorded regularly.

R and R1 are statistical measures used in the field of quality control.

• R stands for Range and is the difference between the highest and lowest values in a sample.

• R1 is the range of the first half of the sample data.

• Both R and R1 are used to calculate the variability of a process.

• They are commonly used in Six Sigma methodology to ensure quality control in manufacturing processes.

The capacity of the beer tanks varied depending on the specific tank, ranging from 1000 to 5000 liters.

• Capacity of beer tanks ranged from 1000 to 5000 liters

• Different tanks had different capacities

• Capacity was determined based on production needs

Red defects refer to the defects that are critical and have a high impact on the quality of the product.

• Red defects are the most severe type of defects that can occur in a product.

• These defects can lead to the product being unusable or unsafe.

• Examples of red defects include missing safety features in a car, contaminated food products, or faulty medical devices.

• Identifying and addressing red defects is crucial to ensure the overall quality and safety of the product.