ELV Projects Pvt Ltd QA QC Engineer Interview Questions, Process, and Tips

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 su...read more

The maximum grade of concrete used at our site is M40.

• M40 grade concrete is commonly used for heavy-duty structures like bridges and high-rise buildings.

• It has a compressive strength of 40 megapascals (MPa) after 28 days of curing.

• The mix proportion for M40 concrete is 1:1.5:3 (cement:sand:aggregate).

The design mix of a particular grade of concrete depends on the required strength and other factors.

• The design mix includes the proportion of cement, sand, aggregates, and water.

• For example, the design mix for M20 grade concrete is 1:1.5:3 (cement:sand:aggregates) with a water-cement ratio of 0.5.

• The design mix is determined by conducting trials and tests on the materials used.

• The mix should be adjusted based on factor...read more

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.

The ingredients of concrete are cement, water, aggregates, and admixtures.

• Cement is the binding agent that holds the mixture together

• Water is added to activate the cement and make the mixture workable

• Aggregates are the coarse and fine materials that make up the bulk of the mixture

• Admixtures are added to modify the properties of the concrete, such as setting time or workability

• Examples of admixtures include air-entraini...read more

GGBS stands for Ground Granulated Blast Furnace Slag.

• GGBS is a by-product of the iron-making industry.

• It is obtained by quenching molten iron slag from a blast furnace with water or steam.

• GGBS is used as a partial replacement for Portland cement in concrete production.

• It improves the durability, workability, and strength of concrete.

• GGBS reduces the heat of hydration and the risk of thermal cracking in concrete.

• It also...read more

The grade of received concrete at the site can be determined by checking the documentation, conducting visual inspections, and performing tests.

• Check the documentation provided by the supplier, which should mention the grade of the concrete.

• Conduct visual inspections to assess the appearance and consistency of the concrete. Different grades may have different characteristics.

• Perform tests such as slump test, compressiv...read more

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 siz

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 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 drawi...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 ne

Wastage Co-efficiency is the ratio of actual wastage to the standard wastage.

• Wastage Co-efficiency helps in measuring the efficiency of the production process.

• It is calculated by dividing the actual wastage by the standard wastage.

• The result is expressed in percentage.

• A lower wastage co-efficiency indicates better efficiency.

• For example, if the actual wastage is 10 units and the standard wastage is 15 units, the wastag