600+ QA QC Engineer Interview Questions and Answers

The size of the concrete cube is typically 150x150x150 mm, the size of the slump cone is 100 mm, and the percentage of strength obtained varies for different curing periods.

• Concrete cube size: 150x150x150 mm

• Slump cone size: 100 mm

• Percentage of strength obtained varies for 3, 7, 14, and 28 days

• Example: Strength obtained at 28 days is typically around 90-95% of the design strength

The price of a particular grade of concrete (RMC) varies depending on several factors such as location, quantity, and grade.

• The price of RMC is influenced by the location of the project.

• The quantity of RMC required also affects the price.

• The grade of RMC needed for the project is a significant factor in determining the price.

• The price of RMC can range from $80 to $150 per cubic meter depending on the above factors.

I'm seeking new challenges and opportunities for growth that align with my career goals and values.

• Desire for professional growth: I'm looking for a role that offers more opportunities for advancement and skill development.

• Alignment with company values: Your company's commitment to quality and innovation resonates with my personal values.

• Desire for new challenges: I thrive in environments where I can tackle new problems and contribute to impactful projects.

• Work-life balance: ...read more

QA QC Engineer interview questions covering topics such as Quality Assurance, CAPA 8D, preventive and corrective actions, quality tools, and welding.

• Quality Assurance Engineer ensures that products or services meet the required quality standards.

• CAPA 8D is a problem-solving methodology used to identify, correct, and prevent recurring problems.

• Preventive action aims to prevent potential problems from occurring, while corrective action aims to correct existing problems.

• Quality ...read more

FCC, BCC, and HCP are distinct crystal structures with unique atomic arrangements and properties.

• FCC has atoms at each corner and the center of each face, resulting in a high packing efficiency (74%). Example: Aluminum.

• BCC has atoms at each corner and a single atom at the center of the cube, with a lower packing efficiency (68%). Example: Iron.

• HCP has a hexagonal arrangement with two layers of atoms, achieving a packing efficiency of 74%. Example: Magnesium.

• FCC and HCP both h...read more

SS316 has higher corrosion resistance and strength compared to SS304.

• SS316 contains molybdenum which enhances its corrosion resistance, while SS304 does not.

• SS316 is more suitable for use in harsh environments like marine applications, while SS304 is more commonly used in indoor settings.

• SS316 has higher tensile strength and creep strength than SS304.

Non-conformities can be controlled without affecting financial terms by implementing effective corrective and preventive actions.

• Identify the root cause of the non-conformity

• Implement corrective and preventive actions to prevent recurrence

• Prioritize actions based on risk and impact

• Involve cross-functional teams to ensure effective solutions

• Monitor and measure the effectiveness of actions taken

• Continuously improve the process to prevent future non-conformities

By conducting regular inspections, providing clear guidelines, and offering training and support.

• Regularly conduct on-site inspections to ensure compliance

• Provide clear quality standards and guidelines for contractors to follow

• Offer training and support to help contractors meet quality standards

Address quality concerns by communicating with suppliers, adjusting timelines, and implementing contingency plans.

• Communicate with suppliers to understand reasons for delay

• Adjust project timelines accordingly

• Implement contingency plans such as sourcing materials from alternative suppliers or using substitute materials

• Ensure quality standards are maintained despite delays

Common issues with materials on-site include quality control, supply chain delays, and incorrect specifications.

• Quality control issues such as defects in materials or incorrect measurements

• Supply chain delays leading to shortages or late deliveries

• Incorrect specifications causing compatibility or performance problems

Common defects in concrete include cracks, honeycombing, segregation, and bleeding.

• Cracks: caused by shrinkage, settlement, or overloading. Can be identified visually or by sounding with a hammer.

• Honeycombing: voids in concrete due to poor compaction. Visible on the surface or by breaking a sample.

• Segregation: separation of coarse aggregates from the concrete mix. Can be seen during pouring or by examining a cross-section.

• Bleeding: excess water rising to the surface during cu...read more

Documentation for quality control includes test plans, inspection reports, non-conformance reports, and quality assurance records.

• Test plans outlining testing procedures and criteria

• Inspection reports documenting results of inspections

• Non-conformance reports detailing any deviations from quality standards

• Quality assurance records for tracking quality control activities

An Inspection and Test Plan (ITP) is a document that outlines the procedures and requirements for inspecting and testing materials, products, or services.

• ITPs are typically created before the start of a project to ensure that all necessary inspections and tests are planned and carried out.

• ITPs include details such as the scope of work, acceptance criteria, responsibilities of personnel, and the frequency of inspections and tests.

• ITPs help ensure that quality standards are met...read more

Calculating profit or loss from buying price, margin, and discount.

• Buying value: 10,000

• Margin added: 40% of 10,000 = 4,000

• Selling price after margin: 10,000 + 4,000 = 14,000

• Discount applied: 40% of 14,000 = 5,600

• Final selling price: 14,000 - 5,600 = 8,400

• Profit/Loss calculation: 8,400 (selling price) - 10,000 (cost) = -1,600 (loss)

Field density test is used to determine the density of soil or asphalt in the field to ensure proper compaction.

• Role: Ensures proper compaction of soil or asphalt to meet project specifications

• Carried out using a nuclear gauge or sand cone method

• Measurements taken at different depths and locations to assess uniformity

• Results used to adjust compaction efforts and ensure structural integrity

• Example: In road construction, field density tests are crucial to prevent premature pave...read more

Tests on reinforcement steel bars include visual inspection, dimensional checks, chemical composition analysis, and mechanical testing.

• Visual inspection for any visible defects or damages

• Dimensional checks to ensure the bars meet specified size and shape requirements

• Chemical composition analysis to verify the material composition meets standards

• Mechanical testing such as tensile strength, yield strength, and elongation tests

• Corrosion resistance testing to assess the bars' dur...read more

QA QC stands for Quality Assurance and Quality Control.

• QA QC is a set of processes and activities that ensure the quality of a product or service.

• Quality Assurance focuses on preventing defects and ensuring that processes are followed correctly.

• Quality Control involves inspecting and testing the product or service to identify defects and ensure it meets the required standards.

• QA QC is important in various industries such as manufacturing, construction, software development, a...read more

Overview of basic NDT procedures, including methods, steps, and relevant codes.

• 1. Visual Inspection (VT): Check for surface defects using the naked eye or magnifying tools.

• 2. Ultrasonic Testing (UT): Use high-frequency sound waves to detect internal flaws; reference ASME Section V.

• 3. Radiographic Testing (RT): Employ X-rays or gamma rays to view internal structures; follow ASTM E94 standards.

• 4. Magnetic Particle Testing (MT): Apply magnetic fields to detect surface and near-s...read more

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

Yes, it is possible for bug creation and rectification to be done on the same day.

• It depends on the severity of the bug.

• If it is a minor bug, it can be fixed on the same day.

• If it is a major bug, it may take longer to fix.

• The bug should be properly documented and tested before being fixed.

• The fix should also be properly tested before being deployed.

5S principles are Sort, Set in order, Shine, Standardize, and Sustain. Quality is important to ensure customer satisfaction and business success.

• Sort - eliminate unnecessary items to improve efficiency

• Set in order - organize items for easy access and productivity

• Shine - maintain cleanliness and prevent defects

• Standardize - establish consistent processes for quality control

• Sustain - continuously improve and maintain the 5S principles

• Quality is important to meet customer expect...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

Explanation on calculating normality, molarity, molecular weight and number of bondings in chemical formula.

• Normality is the number of equivalents of a solute per liter of solution. It is calculated by dividing the number of equivalents by the volume of the solution in liters.

• Molarity is the number of moles of a solute per liter of solution. It is calculated by dividing the number of moles by the volume of the solution in liters.

• Molecular weight is the sum of the atomic weigh...read more

The grade of concrete refers to its strength and durability.

• Grade of concrete is denoted by a number followed by 'M' which stands for mix.

• The number represents the compressive strength of the concrete in megapascals (MPa).

• For example, M20 grade concrete means the compressive strength is 20 MPa.

• Different grades of concrete are used for different purposes, such as M10 for non-structural purposes and M40 for heavy-duty structures.

BOQ, DPR, and RFI are essential documents in construction for cost estimation, progress tracking, and clarifying project details.

• BOQ provides a detailed breakdown of materials and labor costs, aiding in budget management.

• DPR tracks daily work progress, helping to identify delays and ensure project timelines are met.

• RFI is used to clarify uncertainties in project specifications, ensuring all parties have a clear understanding.

The tolerance of sand bulkage refers to the acceptable variation in the volume of sand when it is compacted.

• Tolerance of sand bulkage is typically expressed as a percentage.

• It is important to measure and control sand bulkage to ensure consistency in construction materials.

• The acceptable tolerance may vary depending on the specific application and industry standards.

• For example, in concrete production, the tolerance for sand bulkage may be around 2-3%.

• Regular testing and monit...read more