ELV Projects Pvt Ltd QA QC Engineer Interview Questions and Answers

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...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 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

The unit weight of steel varies by diameter, typically around 490 lbs/ft³ for structural steel.

• Unit weight of steel is approximately 490 lbs/ft³ (or 7850 kg/m³).

• For example, a steel bar with a diameter of 16 mm weighs about 0.79 kg/m.

• The weight can be calculated using the formula: Weight = Volume x Density.

• Different steel grades may have slightly different unit weights.

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...read more

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...read more