500+ QA QC Engineer Interview Questions and Answers

Type A, B, and C circuit breakers are categorized based on their trip characteristics.

• Type A circuit breakers trip when the current exceeds 3 to 5 times the rated current.

• Type B circuit breakers trip when the current exceeds 5 to 10 times the rated current.

• Type C circuit breakers trip when the current exceeds 10 to 20 times the rated current.

• Type A and B circuit breakers are commonly used in residential and commercial applications, while Type C is used in industrial settings....read more

Pneumatic items are devices that use compressed air to perform tasks. Defects in products can be identified through inspection and testing. Problem-solving involves troubleshooting and implementing corrective actions.

• Pneumatic items use compressed air to operate machinery or perform tasks.

• Defects in products can be identified through visual inspection, functional testing, or performance evaluation.

• Common defects in pneumatic products include air leaks, faulty valves, pressure...read more

I follow the specifications outlined in ASTM D3515 and AASHTO M320 for preparing mix designs of bituminous.

• Follow ASTM D3515 for designing hot mix asphalt (HMA) mixtures

• Follow AASHTO M320 for designing asphalt mixtures using performance-based tests

• Consider factors such as traffic volume, climate, and pavement condition when selecting mix design specifications

Concrete design mix and minimum cement content are determined by the applicable code.

• Concrete design mix is determined based on the required strength and durability of the structure.

• Minimum cement content is specified by the code to ensure adequate strength and durability.

• For example, ACI 318 specifies a minimum cement content of 564 kg/m3 for concrete with a compressive strength of 28 MPa.

• Other factors such as water-cement ratio, aggregate type and size, and admixtures also ...read more

Soil and concrete strength testing involves several steps including sample collection, preparation, and testing.

• Collect soil and concrete samples from the site

• Prepare the samples for testing by drying and crushing them

• Perform compression tests on concrete samples to determine strength

• Perform triaxial or unconfined compression tests on soil samples to determine strength

• Record and analyze the test results to ensure compliance with standards and specifications

If 02 pieces pass or 01 falls within +10mm tolerance of cover block, it is considered a sample pass.

• A tolerance of +10mm is allowed for cover block.

• If 02 pieces pass or 01 falls within the tolerance limit, it is considered a sample pass.

• If more than 01 piece falls outside the tolerance limit, it is considered a sample fail.

Durability of concrete depends on various factors such as quality of materials, mix design, curing, and environmental conditions.

• Durability is the ability of concrete to resist weathering action, chemical attack, and abrasion.

• Factors affecting durability include water-cement ratio, air content, aggregate quality, and curing conditions.

• Concrete with low water-cement ratio and proper curing can have a lifespan of over 100 years.

• Environmental conditions such as freeze-thaw cycle...read more

Engineering drawing is a graphical representation of an object or structure used to communicate design details.

• Types of views include front, top, side, isometric, and orthographic

• Engineering drawings use standard symbols and conventions to convey information

• Drawings may include dimensions, tolerances, and notes to clarify design intent

• Understanding engineering drawings is essential for QA QC Engineers to ensure products meet specifications

Selecting the right instrument for dimensional inspection involves considering the accuracy, precision, and type of measurement needed.

• Identify the specific dimensions and tolerances that need to be measured

• Consider the accuracy and precision required for the inspection

• Choose the appropriate instrument based on the type of measurement (e.g. calipers for linear measurements, micrometers for precise measurements)

• Ensure the instrument is calibrated and in good working condition ...read more

My job role as a QA QC Engineer has made me technically sound by providing me with in-depth knowledge of mechanical properties of alloys and testing methods.

• Regularly conducting tests on various alloys to determine their mechanical properties such as strength, hardness, and ductility

• Utilizing testing methods such as tensile testing, hardness testing, impact testing, and metallography to assess the quality of alloys

• Analyzing test results to ensure that alloys meet specified st...read more

Soil compaction testing on site involves using various methods to determine the density and moisture content of the soil.

• Use a nuclear density gauge to measure the density of the soil by emitting low-level radiation and detecting the amount of radiation that is scattered back.

• Perform a sand cone test by excavating a hole in the soil, filling it with sand of known density, and then measuring the volume of the hole before and after removing the sand to calculate the density of ...read more

Validation and verification are quality assurance techniques used to ensure that a product meets its requirements.

• Validation ensures that the product meets the customer's needs and intended use.

• Verification ensures that the product meets the specified requirements and standards.

• Smoke testing is a type of validation testing that checks if the basic functionalities of the product are working.

• Smoke testing is usually done before more comprehensive testing is carried out.

The maximum diameter of steel used on the site varies depending on the specific application and design requirements.

• The maximum diameter of steel used on the site is determined by the structural design requirements.

• The maximum diameter of steel used on the site can range from a few millimeters to several inches.

• The maximum diameter of steel used on the site is typically specified in the project specifications and drawings.

• Examples of steel used on the site include reinforcing...read more

The pH value of admixture should be between 6 and 8.

• Admixtures are chemicals added to concrete to enhance its properties.

• The pH value affects the performance of the admixture.

• The ideal pH range for admixture is between 6 and 8.

• If the pH is too high or too low, it can affect the setting time and strength of the concrete.

The ITP for taking over a shell and core floor for final finishing and fitout would involve a thorough inspection and testing process.

• Conduct a detailed inspection of the shell and core floor to identify any defects or issues that need to be addressed before final finishing and fitout can begin

• Develop a comprehensive testing plan to ensure that all systems and components are functioning properly and meet the required standards

• Establish clear communication channels with all st...read more

Checks in Site Inspection for RCC work of Bridge culvert and major bridges

• Check for proper reinforcement placement and spacing

• Check for proper concrete mix and slump

• Check for proper curing of concrete

• Check for proper alignment and level of formwork

• Check for proper placement and compaction of concrete

• Check for proper finishing of concrete surface

• Check for cracks and defects in concrete

• Check for proper drainage system

• Check for proper safety measures on site

High rise towers differ from regular buildings in terms of structural design, materials used, utilities, and maintenance requirements.

• Structural design of high rise towers must account for factors like wind loads, seismic activity, and building sway.

• Materials used in high rise towers are typically stronger and more durable to support the weight and height of the building.

• Utilities in high rise towers, such as elevators, HVAC systems, and fire protection, are more complex and ...read more

I last used M25 grade concrete with a cement content of 300 kg/m3.

• Last used M25 grade concrete

• Cement content was 300 kg/m3

SCB was chosen over AAC block due to its higher strength and durability.

• SCB has a compressive strength of around 5-7 MPa, which is higher than AAC block.

• SCB is more durable and resistant to fire compared to AAC block.

• SCB is a cost-effective option for construction projects requiring high strength and durability.

IS codes are Indian standards that provide guidelines for construction materials, methods, and practices.

• IS 456:2000 - Code of practice for plain and reinforced concrete

• IS 3370:1965 - Code of practice for concrete structures for storage of liquids

• IS 800:2007 - General construction in steel - Code of practice

• IS 1893:2016 - Criteria for earthquake resistant design of structures

• IS 383:2016 - Specifications for coarse and fine aggregates from natural sources for concrete

• IS 1786:2...read more

Boundary value analysis is a software testing technique used to test boundary conditions of input variables.

• It involves testing the minimum and maximum boundaries of input ranges.

• Helps in identifying errors at the boundaries of input values.

• Example: Testing a login form with password length of 6 characters (boundary) and 20 characters (boundary).

The process sequence of an ISO 9001 certified fabrication company involves planning, design, procurement, production, inspection, testing, and delivery.

• Planning and design of the product or project

• Procurement of raw materials and equipment

• Production of the product or project

• Inspection and testing of the product or project

• Delivery of the product or project

• Continuous improvement of the quality management system

If the fan does not fit properly, it can cause noise, reduced airflow, overheating, and potential damage to the fan or other components.

• Noise: Improperly fitted fan can create rattling or grinding noises.

• Reduced airflow: The fan may not be able to circulate air efficiently, leading to poor cooling performance.

• Overheating: Inadequate cooling due to improper fit can cause components to overheat, potentially leading to system instability or damage.

• Damage to fan or components: If...read more

I would like to work in the field of highway construction and maintenance.

• Highway construction

• Highway maintenance

• Road rehabilitation

• Traffic management

• Bridge construction and inspection

If cube test fails, first check for errors in testing procedure, materials, or equipment.

• Check if the testing procedure was followed correctly

• Inspect the materials used for any defects or inconsistencies

• Verify the calibration and condition of testing equipment

• Repeat the cube test with new samples to confirm results

Observation vs NCR, NCR process, closing NCR

• Observation is a general comment or feedback, while NCR is a non-conformance report indicating a deviation from standards

• NCR process involves documenting the issue, investigating root cause, implementing corrective actions, and verifying effectiveness

• Closing a NCR requires verifying that corrective actions have been implemented and are effective, updating records, and obtaining approval from relevant parties

Various welding rod types are applicable for welding carbon steel to stainless steel 310, 316, and 304.

• For welding carbon steel to stainless steel 310, 316, and 304, commonly used welding rod types include E309L, E316L, and E308L.

• E309L welding rods are suitable for welding stainless steel 310 to carbon steel.

• E316L welding rods are ideal for welding stainless steel 316 to carbon steel.

• E308L welding rods are commonly used for welding stainless steel 304 to carbon steel.

Pre-checking for tiling activity includes surface preparation, layout planning, and material inspection.

• Ensure the surface is clean, dry, and level

• Check for any cracks or unevenness in the surface

• Plan the layout of tiles to ensure symmetry and avoid cutting small pieces

• Inspect the tiles for any defects or damages before installation

• Check the adhesive and grout for compatibility with the tiles

• Verify the correct tile size and color before installation

Manpower refers to the total number of workers or employees available or required for a particular job or project.

• Manpower is a term commonly used in industries to refer to the human resources available for work.

• It includes both the existing workforce and the potential workforce that can be hired.

• Manpower planning involves assessing the number of workers needed to meet the demands of a project or organization.

• It is important to ensure the right balance of skills and expertise...read more

WPQ stands for Welder Performance Qualification, Qualified Welder list is a list of welders who have passed the WPQ test, Calibration Records are documents showing equipment calibration history.

• WPQ is a test to ensure welders can produce quality welds

• Qualified Welder list includes names of welders who have passed the WPQ test

• Calibration Records document equipment calibration history

• Punch points to maintain include regular WPQ tests, updating Qualified Welder list, and keeping...read more

The least count of vernier and micrometer are the smallest measurement that can be read on the scale.

• The least count of a vernier caliper is typically 0.02 mm or 0.001 inches.

• The least count of a micrometer is typically 0.01 mm or 0.0001 inches.

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

• The smaller the least count, the more precise the measurement can be.

• It is important to use the correct least count when taking measuremen...read more

Non-functional testing involves testing aspects of the system that are not related to specific functionalities, such as performance, security, and usability.

• Non-functional testing includes performance testing, security testing, usability testing, scalability testing, etc.

• Black box testing techniques involve testing the functionality of a system without knowing its internal code or structure.

• Examples of black box testing techniques include equivalence partitioning, boundary va...read more

The question covers various topics related to construction and soil engineering.

• Construction joint is a joint between two concrete slabs to allow for expansion and contraction.

• Cold joint is a joint between two concrete pours that have not been properly bonded.

• Soil liquid limit is the moisture content at which soil changes from plastic to liquid state.

• Soil plastic limit is the moisture content at which soil changes from plastic to semi-solid state.

• Soil compaction method is the...read more

Welding inspection process involves checking weld quality through visual, NDT testing methods like radiography, ultrasonic testing, etc. Different types of welding include MIG, TIG, stick, etc.

• Welding inspection process involves visual examination to check for defects like cracks, porosity, incomplete penetration, etc.

• NDT testing methods like radiography, ultrasonic testing, magnetic particle testing, dye penetrant testing are used to detect internal defects in welds.

• Types of...read more

An inverter is a device that converts DC power from a battery into AC power for use in appliances. Batteries store electrical energy for later use.

• Inverters convert DC power from batteries into AC power for use in appliances

• Batteries store electrical energy for later use

• Functions of inverters include converting power, regulating voltage, and providing backup power

• Types of batteries include lead-acid, lithium-ion, and nickel-cadmium

To measure form of tools and convert units, use appropriate measuring instruments and conversion formulas.

• Use calipers, micrometers, or height gauges to measure form of tools.

• Refer to conversion tables or use online conversion tools to convert units.

• For example, to convert inches to millimeters, multiply by 25.4.

• Ensure accuracy by calibrating measuring instruments regularly.

Tolerance in QA QC refers to acceptable deviation from a specified standard. It is important to refer to relevant industry standards or project specifications.

• Refer to industry standards or project specifications for tolerance limits

• Ensure that all measurements and inspections are within the specified tolerance range

• Communicate any deviations from tolerance to relevant stakeholders

• Implement corrective actions if tolerance limits are exceeded

• Regularly review and update toleran...read more

The maximum temperature of concrete permitted is 70-75°C.

• High temperatures can cause cracks and weaken the concrete.

• The maximum temperature is usually achieved during curing.

• The temperature should be monitored and controlled during the entire process.

The symbol for fillet weld in GD&T is a triangle. Material conditions are calculated based on the maximum and minimum limits of the material properties.

• The symbol for fillet weld is a triangle in GD&T.

• Material conditions are calculated based on the maximum and minimum limits of the material properties.

• The position symbol for fillet weld is a circle with a triangle inside.

• Material conditions can be calculated using statistical methods such as Six Sigma or by using industry sta...read more

FMEA is a systematic method for identifying and preventing potential failures in a product or process.

• FMEA involves identifying potential failure modes, their effects, and the causes of these failures.

• It helps prioritize which failures to address first based on their severity, occurrence, and detection.

• FMEA is commonly used in industries such as automotive, aerospace, and manufacturing to improve product quality and reliability.

• Example: In automotive manufacturing, FMEA can b...read more

The ASME B31.3 code is referred for hydrostatic testing and the ASME B31.1 code is referred for pneumatic testing.

• ASME B31.3 code is the Process Piping Code and it provides guidelines for hydrostatic testing of process piping systems.

• ASME B31.1 code is the Power Piping Code and it provides guidelines for pneumatic testing of power piping systems.

• Hydrostatic testing involves filling the system with water or another suitable liquid and pressurizing it to check for leaks or stru...read more

ISO 9001:2015 emphasizes risk-based thinking and a process approach to quality management.

• ISO 9001:2015 has a stronger focus on leadership and top management involvement

• The new version emphasizes risk-based thinking and a process approach to quality management

• ISO 9001:2015 has a greater emphasis on measuring and evaluating the effectiveness of quality management systems

• The new version also includes a greater emphasis on continuous improvement

• ISO 9001:2015 has a more flexible ...read more

The tiling works in bathroom should start with proper surface preparation and layout planning.

• Ensure the surface is clean, dry, and level

• Plan the layout to avoid small cuts and ensure symmetry

• Start tiling from the center of the wall or floor

• Use spacers to maintain consistent gaps between tiles

• Apply adhesive evenly and in small sections

• Check for level and adjust as needed

• Allow adhesive to dry before grouting

The amount of cubic metre of concrete that can be poured in a day depends on various factors such as the size of the project, number of workers, equipment used, weather conditions, etc.

• The size of the project plays a major role in determining the amount of concrete that can be poured in a day

• The number of workers and equipment used also affect the productivity of the project

• Weather conditions such as temperature, humidity, and wind speed can affect the setting time of the con...read more

Pre-checking is a process of inspecting the surface before painting to ensure it is clean, dry, and free from defects.

• Inspect surface for cleanliness, dryness, and defects

• Check for any cracks, holes, or roughness

• Ensure surface is properly primed

• Verify that the surface is suitable for the type of paint being used

• Confirm that the ambient temperature and humidity are within the recommended range

• Perform adhesion test if necessary

Discrimination study of LV switchgear involves testing its ability to distinguish between fault and non-fault conditions.

• Discrimination study is done to ensure that the switchgear can accurately detect and isolate faults.

• It involves testing the switchgear's response to different fault conditions and verifying that it can distinguish between them.

• Examples of fault conditions include overcurrent, short circuit, and earth fault.

• The study also involves verifying that the switchge...read more

Site validation in specification knowledge and procedures for field work is essential for QA QC Engineers.

• Understanding the specifications and requirements for each site is crucial

• Following established procedures and protocols for field work

• Ensuring that all work is in compliance with industry standards and regulations

• Regularly updating knowledge on new technologies and best practices

• Documenting all validation processes and results for future reference