30+ Senior QA QC Engineer Interview Questions and Answers

The design mix of M30 grade concrete is a specific proportion of ingredients as per IS code.

• The design mix of M30 grade concrete typically consists of cement, fine aggregate, coarse aggregate, and water.

• The proportion of ingredients in the design mix is determined based on the desired strength and workability of the concrete.

• As per IS code, the design mix for M30 grade concrete is 1:1:2, which means 1 part cement, 1 part fine aggregate, and 2 parts coarse aggregate by volume....read more

Steel is an alloy of iron and carbon, with other elements added to enhance its properties.

• Steel is primarily composed of iron and carbon.

• The carbon content in steel is typically between 0.2% and 2.1%.

• Other elements like manganese, chromium, nickel, and molybdenum are added to improve strength, hardness, and corrosion resistance.

• The composition of steel can vary depending on the desired properties and intended use.

• For example, stainless steel contains high levels of chromium t...read more

The minimum percentage of admixture used in design mix varies depending on the type of admixture and the desired properties of the concrete.

• The percentage of admixture used in design mix can range from 0.1% to 5%.

• Admixtures are added to concrete to improve its workability, strength, durability, and other properties.

• Common types of admixtures include water reducers, air-entraining agents, accelerators, retarders, and superplasticizers.

• The amount of admixture used should be det...read more

The maximum limit of fly ash after weight sieving depends on the specific standards and regulations set by the governing body.

• The maximum limit of fly ash after weight sieving varies depending on the governing body's regulations.

• For example, in India, the maximum limit of fly ash after weight sieving for use in cement is 12%.

• In the United States, the maximum limit of fly ash after weight sieving for use in concrete is typically 35%.

• The specific limit will depend on the intend...read more

The best cleaning methods for pipelines after construction include pigging, chemical cleaning, and water flushing.

• Pigging involves using a device called a 'pig' to remove debris and buildup from the pipeline.

• Chemical cleaning uses specialized chemicals to dissolve and remove contaminants from the pipeline walls.

• Water flushing involves flushing the pipeline with water at high pressure to remove any remaining debris or contaminants.

The unit weight of steel of dia 25mm is 3.85 kg/m.

• The unit weight of steel is calculated based on its density and cross-sectional area.

• The density of steel is approximately 7850 kg/m^3.

• The cross-sectional area of a 25mm diameter steel rod is 0.0004909 m^2.

• Multiplying the density and cross-sectional area gives the unit weight of 3.85 kg/m.

IS code for Aggregate Testing is IS 2386

• IS 2386 is the Indian Standard code for aggregate testing

• It provides guidelines for various tests on aggregates such as sieve analysis, specific gravity, water absorption, etc.

• These tests help in determining the quality and suitability of aggregates for construction purposes

The targeted strength of a cube refers to the desired compressive strength it should possess.

• Targeted strength is measured in terms of compressive strength.

• It is important to determine the targeted strength based on the specific requirements of the project.

• The targeted strength can vary depending on factors such as the type of concrete mix, curing conditions, and intended use of the cube.

• For example, a cube used in a high-rise building may have a higher targeted strength comp...read more

Iron is a chemical element while steel is an alloy of iron and carbon.

• Iron is a pure element while steel is a mixture of iron and carbon

• Iron is soft and malleable while steel is hard and strong

• Iron rusts easily while steel is more resistant to corrosion

• Iron is used in construction, manufacturing, and transportation while steel is used in construction, manufacturing, and many other industries

• Examples of iron products include nails, screws, and pipes while examples of steel pro...read more

WPS stands for Welding Procedure Specification. It is a document that outlines the welding process to be used for a specific job.

• The WPS should include details such as the type of welding process, the materials to be welded, the welding position, and the welding parameters.

• The WPS should be developed by a qualified welding engineer or welding specialist.

• The WPS should be reviewed and approved by the client or customer before welding begins.

• The WPS should be followed closely d...read more

Slag is a byproduct of metal smelting process. Flux is a substance used to promote fusion in welding and soldering.

• Slag is a glass-like byproduct of metal smelting process

• It is usually composed of impurities that are separated from the metal during the smelting process

• Flux is a substance used to promote fusion in welding and soldering

• It helps to prevent oxidation and other impurities from contaminating the weld or solder joint

• Examples of flux include borax, ammonium chloride,...read more

QA/QC is a process of ensuring quality of a product or service, while specific gravity and density are physical properties of a substance.

• QA/QC involves testing and inspection to ensure quality standards are met

• Specific gravity is the ratio of a substance's density to the density of a reference substance

• Density is the mass per unit volume of a substance

• QA/QC is a process, while specific gravity and density are properties

• QA/QC can be applied to any product or service, while sp...read more

Blast furnace liquids refer to the molten iron and slag that are produced during the iron-making process in a blast furnace.

• Blast furnace liquids are a mixture of molten iron and slag

• They are produced during the iron-making process in a blast furnace

• The molten iron is typically used to make steel

• The slag is a byproduct that can be used in construction or as a raw material in cement production

The melting point of steel varies depending on the type of steel, but generally ranges from 1370-1530°C (2500-2790°F).

• Steel is an alloy of iron and carbon, with other elements added for specific properties.

• The melting point of steel can be affected by the amount and type of alloying elements.

• Different types of steel have different melting points, with some high-strength steels having melting points above 2000°C.

• Steel can also be melted using various methods, including electri...read more

Ladle refining process is a secondary steelmaking process used to remove impurities from molten steel.

• Molten steel is transferred from the primary steelmaking furnace to a ladle.

• Various chemicals are added to the ladle to remove impurities such as sulfur, phosphorus, and carbon.

• The ladle is then stirred to ensure the chemicals are evenly distributed.

• The refined steel is then poured into molds to create the desired shape.

• Ladle refining process is commonly used in the productio...read more

A cube test is a process used to determine the compressive strength of concrete cubes.

• Concrete cubes are prepared and cured under specific conditions.

• After the curing period, the cubes are tested using a compression testing machine.

• The maximum load applied to the cube is recorded.

• The compressive strength of the cube is calculated by dividing the maximum load by the cross-sectional area of the cube.

• The test results are used to assess the quality and strength of the concrete.

QA/QC of hydrocarbon's pipeline construction involves ensuring compliance with industry standards and regulations.

• Performing inspections and tests on materials used in construction

• Monitoring welding processes to ensure quality and integrity of welds

• Conducting pressure tests to check for leaks and structural integrity

• Documenting all QA/QC activities and maintaining records for future reference

I am an experienced Senior QA QC Engineer with expertise in implementing and managing QA QC models.

• I have extensive knowledge of QA QC models and their implementation

• I have experience in managing and leading QA QC teams

• I am skilled in developing and executing test plans and procedures

• I have expertise in identifying and resolving quality issues

• I am proficient in using various QA QC tools and software

• I have excellent communication and interpersonal skills

The refrigeration cycle is a thermodynamic process that removes heat from a space or substance to lower its temperature.

• The cycle consists of four main components: compressor, condenser, expansion valve, and evaporator.

• The compressor increases the pressure and temperature of the refrigerant gas.

• The high-pressure gas then flows into the condenser where it releases heat and condenses into a high-pressure liquid.

• The liquid refrigerant passes through the expansion valve, which re...read more

QAM stands for Quality Assurance Manual and QAP stands for Quality Assurance Plan.

• QAM is a document that outlines the quality policies and procedures of an organization.

• QAP is a document that outlines the specific quality control activities that will be performed on a project.

• QAM is a high-level document that provides an overview of the organization's quality management system.

• QAP is a more detailed document that outlines the specific quality control activities that will be p...read more

To prepare measurement, follow these steps

• Identify the parameter to be measured

• Select the appropriate measuring instrument

• Calibrate the instrument before use

• Ensure the instrument is in good working condition

• Take multiple measurements to ensure accuracy

• Record the measurements accurately

• Analyze the data to draw conclusions

Acceptance criteria for welding defects

• Acceptance criteria for welding defects are specified in codes and standards such as AWS D1.1, ASME Section VIII, and API 1104

• The criteria depend on the type of defect, its location, and the material being welded

• Examples of acceptance criteria include maximum allowable size and number of defects, distance from the weld centerline, and type of defect

• Defects that exceed the acceptance criteria are considered unacceptable and require repair...read more

Standard Operating Procedure (SOP) is a documented procedure that outlines the steps to be followed in a particular process.

• SOPs ensure consistency and quality in processes

• They provide clear instructions for employees to follow

• SOPs are regularly reviewed and updated to ensure they remain relevant and effective

Yes, I am familiar with material testing.

• I have experience in conducting various tests on materials such as tensile strength, hardness, impact resistance, and corrosion resistance.

• I am proficient in using testing equipment such as universal testing machines, hardness testers, and spectrometers.

• I am knowledgeable in various testing standards such as ASTM, ISO, and ASME.

• I have worked with a variety of materials including metals, plastics, and composites.

• I understand the importa...read more

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I am currently earning $X as my current CTC and I am expecting a salary of $Y for this role.

• My current CTC is $X.

• I am expecting a salary of $Y for this role.

• I believe my skills and experience justify this salary expectation.

• I am open to negotiation based on the overall compensation package offered.

Implemented 6 Sigma methodology in various projects to improve quality and reduce defects.

• Used DMAIC (Define, Measure, Analyze, Improve, Control) approach to identify and solve problems

• Reduced defects and improved process efficiency by analyzing data and implementing statistical tools

• Trained team members on 6 Sigma principles and tools to ensure successful implementation

• Examples: Reduced customer complaints by 50% in a manufacturing project, Improved delivery time by 30% in a...read more

Inspection involves thorough examination and evaluation of products or processes to ensure they meet quality standards.

• Develop a detailed inspection plan outlining what needs to be inspected and how

• Use appropriate tools and techniques to conduct inspections

• Document findings and communicate any issues or defects to relevant stakeholders

• Follow up on corrective actions to ensure issues are resolved

• Regularly review and update inspection procedures to improve effectiveness

Brazing is a metal-joining process where a filler metal is heated above its melting point and distributed between two or more close-fitting parts.

• Brazing is used to join different types of metals together.

• The filler metal, known as brazing alloy, has a lower melting point than the base metals being joined.

• The brazing process involves heating the assembly to the brazing temperature and then applying the filler metal.

• The filler metal flows into the joint by capillary action, cr...read more

Pipe coating procedure involves applying a protective layer on the surface of the pipe to prevent corrosion and damage.

• The surface of the pipe should be cleaned and prepared before coating.

• The coating material should be selected based on the type of pipe and its intended use.

• The coating should be applied evenly and in accordance with the manufacturer's instructions.

• The coating should be inspected for defects and thickness to ensure proper protection.

• The coated pipe should be ...read more

6 Sigma is a data-driven methodology for process improvement.

• It aims to reduce defects and improve quality by identifying and eliminating causes of variation in processes.

• It uses statistical analysis to measure and improve performance.

• It follows a structured approach of Define, Measure, Analyze, Improve, and Control (DMAIC) to achieve process improvement.

• Example: A manufacturing company uses 6 Sigma to reduce defects in their production line and improve overall quality.

• Exampl...read more

Frameworks are pre-defined structures that provide guidelines and reusable components for software development.

• Frameworks help in organizing and structuring code.

• They provide a set of rules and best practices for development.

• Frameworks offer reusable components and libraries.

• They enhance productivity and reduce development time.

• Examples of frameworks include Selenium for web testing, JUnit for unit testing, and Spring for Java development.

The question is about piping with the same code.

• Piping refers to the system of pipes used for transporting fluids or gases.

• The term 'same code' likely refers to using the same material or specifications for the piping.

• The question may involve discussing the advantages, disadvantages, or considerations of using the same code for piping.

• Examples could include discussing the impact on maintenance, compatibility, or safety.