60+ Quality Controller Interview Questions and Answers for Freshers

Chemistry is the study of matter and its properties. Organic chemistry deals with carbon-based compounds while inorganic chemistry deals with non-carbon-based compounds.

• Chemistry is a branch of science that deals with the composition, structure, properties, and reactions of matter.

• Organic chemistry is the study of carbon-based compounds, including hydrocarbons, carbohydrates, proteins, and nucleic acids.

• Inorganic chemistry is the study of non-carbon-based compounds, including...read more

FSSAI and ISO play important roles in ensuring quality and safety standards in the liquor industry.

• FSSAI sets standards for food and beverages, including alcoholic beverages, to ensure their safety and quality.

• ISO provides guidelines for quality management systems, which can be applied to the production and distribution of alcoholic beverages.

• Compliance with FSSAI and ISO standards can help ensure that the liquor industry meets regulatory requirements and produces high-qualit...read more

IS code specifies limits for flakiness and elongation index to ensure quality in construction materials.

• Flakiness Index: Should not exceed 15% for coarse aggregates.

• Elongation Index: Should not exceed 10% for coarse aggregates.

• Flakiness Index measures the percentage of particles whose thickness is less than 0.6 times their mean dimension.

• Elongation Index measures the percentage of particles whose length is greater than 1.8 times their mean dimension.

• Example: If 100 particles ...read more

Quality checking involves inspecting products or services to ensure they meet certain standards.

• Quality checking involves examining products or services to ensure they meet certain standards

• This can involve visual inspection, testing, or other methods depending on the product or service

• Experience in quality checking can vary, but typically requires knowledge of industry standards and regulations

• To check the quality status, one must compare the product or service to establishe...read more

Harmful bacteria and their limits vary depending on the context and industry.

• Common harmful bacteria include Salmonella, E. coli, and Listeria.

• Limits for harmful bacteria in food are regulated by government agencies.

• In the medical field, harmful bacteria can cause infections and diseases.

• Different industries have specific guidelines for acceptable levels of bacteria.

• Regular testing and quality control measures are essential to ensure safety.

IS codes specify a minimum mixing time for concrete to ensure uniformity and strength, typically around 2 to 5 minutes.

• The minimum mixing time for concrete is generally 2 minutes for a concrete mixer.

• For larger batches, the mixing time can extend to 5 minutes to ensure proper consistency.

• Different types of mixers may have varying mixing times; for instance, a pan mixer may require less time than a drum mixer.

• It's crucial to adhere to these times to achieve the desired workabi...read more

The presence of chlorine can be confirmed by adding nitric acid and silver nitrate to a sample, resulting in a curdy white precipitate.

• Mix 1 ml sample with 5 ml nitric acid and 5 ml silver nitrate

• Add 10 ml water and observe for curdy white precipitate

• Presence of chlorine confirmed if precipitate forms

I have extensive technical knowledge of pharmaceutical production.

• I am familiar with Good Manufacturing Practices (GMP) and Quality Control (QC) procedures.

• I have experience in operating and maintaining production equipment such as tablet presses, capsule fillers, and packaging machines.

• I am knowledgeable in the formulation and compounding of pharmaceutical products.

• I am familiar with the various stages of pharmaceutical production, including raw material testing, in-process ...read more

Quality assurance for a product should start at the beginning of the product development process.

• Start quality assurance during the design phase to prevent issues from arising later on

• Implement quality control measures during manufacturing to ensure consistency and reliability

• Conduct regular inspections and testing throughout the production process

• Involve stakeholders in the quality assurance process to gather feedback and make improvements

• Continuously monitor and evaluate th...read more

The Listcount of vernier caliper & micrometers is 2.

• The Listcount of vernier caliper is 1.

• The Listcount of micrometers is 1.

Food should be stored at a temperature below 40°F (4°C) or above 140°F (60°C).

• Cold food should be stored at or below 40°F (4°C) to prevent bacterial growth.

• Hot food should be stored at or above 140°F (60°C) to prevent bacterial growth.

• Refrigerators should be set to a temperature between 34°F (1°C) and 40°F (4°C).

• Freezers should be set to a temperature of 0°F (-18°C) or below.

Standard quality control procedures involve several stages to ensure the quality of products or services.

• 1. Planning and designing the quality control process

• 2. Sampling and testing the products or services

• 3. Analyzing the results and identifying any deviations from standards

• 4. Implementing corrective actions if necessary

• 5. Monitoring and documenting the entire quality control process

Maintaining hygiene condition of product is crucial for quality control.

• Ensure proper cleaning and sanitation of equipment and facilities.

• Implement strict quality control measures to prevent contamination.

• Train employees on proper hygiene practices and provide necessary equipment.

• Regularly monitor and test products for any signs of contamination.

• Follow industry regulations and guidelines for hygiene and sanitation.

• Use appropriate packaging and storage methods to prevent conta...read more

Chlorine can be identified by its distinct smell. Nitric acid molecular formula is HNO3. Acetic acid molecular formula is CH3COOH.

• Chlorine can be identified by its pungent smell similar to bleach.

• Nitric acid molecular formula is HNO3.

• Acetic acid molecular formula is CH3COOH.

Temperature is important in food storage to prevent bacterial growth and spoilage.

• High temperatures can cause bacteria to multiply rapidly, leading to foodborne illnesses

• Low temperatures can slow down or stop bacterial growth, preserving the quality and safety of food

• Different types of food require different storage temperatures, such as refrigeration for dairy products and freezing for meat

• Monitoring and controlling temperature is crucial in preventing food spoilage and ensu...read more

To maintain production quality, it is important to implement quality control measures, train employees, use standardized processes, and continuously monitor and improve the production process.

• Implement quality control measures such as regular inspections, testing, and audits

• Train employees on quality standards, procedures, and best practices

• Use standardized processes and documentation to ensure consistency

• Continuously monitor and measure key quality indicators

• Implement correc...read more

Solution, solvent, and solute are terms used in chemistry to describe the components of a homogeneous mixture.

• A solution is a homogeneous mixture composed of a solvent and one or more solutes.

• The solvent is the substance that dissolves the solute(s) to form the solution.

• The solute is the substance that is dissolved in the solvent to form the solution.

• For example, in a saltwater solution, water is the solvent and salt is the solute.

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

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

The normal temperature for vaccines and sera varies depending on the type and manufacturer.

• Different vaccines and sera require different storage temperatures

• The recommended temperature range is usually indicated on the product label

• Most vaccines and sera need to be stored between 2-8°C

• Some vaccines, like the Pfizer-BioNTech COVID-19 vaccine, require ultra-cold storage at -70°C or below

• Exposure to temperatures outside the recommended range can affect the potency and efficacy o...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

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

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

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

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.

Several factors affect the quality of a product.

• Raw materials

• Production process

• Equipment maintenance

• Quality control measures

• Packaging and storage

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.

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

HACCP stands for Hazard Analysis and Critical Control Points. It is a systematic approach to identify, evaluate, and control food safety hazards.

• HACCP is a preventive system used in the food industry to ensure the safety of food products.

• It involves identifying potential hazards, determining critical control points, and implementing control measures.

• HACCP focuses on monitoring and controlling critical points in the production process to prevent hazards.

• Examples of critical co...read more

Market complaints can be controlled by identifying the root cause and implementing corrective actions.

• Collect and analyze customer feedback

• Identify the root cause of the complaints

• Implement corrective actions to address the root cause

• Monitor the effectiveness of the corrective actions

• Communicate with customers to show that their feedback is valued

There are many types of steel, each with different properties and uses.

• Carbon steel

• Alloy steel

• Stainless steel

• Tool steel

• High-speed steel

Admixtures are substances added to concrete to enhance its properties for specific applications.

• 1. Water-reducing admixtures: Improve workability and reduce water content (e.g., lignosulfonates).

• 2. Retarding admixtures: Delay setting time for hot weather (e.g., sugars, citric acid).

• 3. Accelerating admixtures: Speed up curing time (e.g., calcium chloride).

• 4. Air-entraining admixtures: Improve freeze-thaw resistance (e.g., Vinsol resin).

• 5. Superplasticizers: Enhance fluidity wi...read more

FIFO stands for First-In-First-Out.

• FIFO is a method of inventory management.

• It assumes that the first items purchased are the first sold.

• It is commonly used in industries such as food and beverage.

• It helps prevent spoilage and waste.

• It is also used in computer science for data structures.

• For example, a queue data structure follows the FIFO principle.

The process of preparing beer involves malting, mashing, boiling, fermenting, conditioning, and packaging.

• Malting: Barley grains are soaked, germinated, and dried to create malt.

• Mashing: Malt is mixed with hot water to extract sugars.

• Boiling: The sugary liquid (wort) is boiled with hops for flavor and bitterness.

• Fermenting: Yeast is added to the cooled wort to convert sugars into alcohol and carbon dioxide.

• Conditioning: The beer is aged to develop flavors and clarity.

• Packagin...read more

Tolerance refers to the acceptable range of variation in a product's specifications.

• Tolerance is the maximum allowable deviation from a specified dimension or value.

• It ensures that a product meets quality standards even if there are slight variations in manufacturing.

• For example, if a part is supposed to be 10 cm long with a tolerance of +/- 0.1 cm, it can be anywhere from 9.9 cm to 10.1 cm.

• Tolerance is crucial in industries like manufacturing, engineering, and quality contro...read more

Room temperature refers to the average temperature of a room or space.

• Room temperature is typically between 68-72 degrees Fahrenheit (20-22 degrees Celsius).

• It is important to maintain a consistent room temperature for certain products or processes.

• Room temperature can affect the comfort and productivity of individuals in a space.

• Temperature can be measured using a thermometer or thermostat.

• Factors such as humidity and air flow can also impact perceived room temperature.

pH is a measure of acidity or alkalinity of a solution on a scale of 0-14.

• pH stands for 'potential of hydrogen'

• A pH of 7 is neutral, below 7 is acidic, and above 7 is alkaline

• The pH scale is logarithmic, meaning each whole number change represents a tenfold change in acidity or alkalinity

• Examples of pH values: lemon juice (2.0), vinegar (2.5), water (7.0), baking soda (8.5), ammonia (11.5)

Supervising a team involves setting clear expectations, providing support, giving feedback, and fostering a positive work environment.

• Set clear goals and expectations for each team member.

• Provide necessary resources and support to help team members succeed.

• Give regular feedback on performance and provide opportunities for growth.

• Encourage open communication and collaboration among team members.

• Lead by example and foster a positive work culture.

• Address any conflicts or issues ...read more

Strong acids and bases dissociate completely in water, while weak acids and bases only partially dissociate.

• Strong acids: HCl, HNO3, H2SO4

• Strong bases: NaOH, KOH, Ca(OH)2

• Weak acids: acetic acid, carbonic acid

• Weak bases: ammonia, pyridine

M20 refers to a specific grade of concrete mix, commonly used in construction for its strength and durability.

• M20 indicates a concrete mix with a characteristic compressive strength of 20 MPa.

• It is commonly used for structural applications like beams, slabs, and columns.

• M20 is a mix of cement, sand, aggregates, and water, typically in a ratio of 1:1.5:3.

• It is suitable for medium-strength structures and is often used in residential buildings.

Hard water contains high levels of minerals, while soft water has low mineral content.

• Hard water can cause mineral buildup in pipes and appliances

• Soft water is better for washing clothes and dishes

• Hard water can taste different than soft water

• Water hardness is measured in grains per gallon (GPG)

• The ideal water hardness level is between 7-10 GPG

Curing tanks should maintain specific temperatures for optimal material properties as per industry standards.

• Curing temperature typically ranges from 20°C to 30°C for most concrete applications.

• Higher temperatures can accelerate curing but may lead to cracking if not controlled.

• For certain materials, like epoxy, curing temperatures can be as high as 60°C.

• Monitoring temperature is crucial to ensure proper hydration and strength development.

GMP stands for Good Manufacturing Practice.

• GMP is a set of guidelines that ensure the quality and safety of pharmaceuticals, food, and medical devices.

• It covers all aspects of production, from raw materials to finished products.

• GMP requires documentation, quality control, and testing to ensure consistency and purity.

• Examples of GMP regulations include proper labeling, storage, and handling of products.

• GMP is enforced by regulatory agencies such as the FDA and EMA.

Raman spectroscopy is a technique used to study vibrational, rotational, and other low-frequency modes in a system.

• It involves the use of a laser to excite the molecules in a sample, causing them to vibrate and emit light at different wavelengths.

• The resulting spectrum can be used to identify the chemical composition of the sample and study its molecular structure.

• Raman spectroscopy is commonly used in materials science, chemistry, and biology.

• It can be used to analyze the co...read more