NKG Infrastructure QA QC Engineer Interview Questions and Answers

SOP for basic activities at site includes inspection, testing, documentation, and reporting.

• Inspection of materials and equipment

• Testing of materials for quality control

• Documentation of test results and findings

• Reporting any deviations or non-conformities

• Ensuring compliance with project specifications and standards

The slump cone size is 12 inches in height, 8 inches in diameter at the base, and 4 inches in diameter at the top.

• The slump cone is used to measure the consistency of concrete.

• It is filled with freshly mixed concrete and then lifted vertically to see how much the concrete slumps or settles.

• The size of the cone affects the accuracy of the test results.

• The standard size for a slump cone is 12 inches in height, 8 inches i...read more

There are several types of brick tests including compressive strength, water absorption, efflorescence, and dimension tests.

• Compressive strength test measures the ability of a brick to withstand crushing loads.

• Water absorption test determines the amount of water absorbed by a brick.

• Efflorescence test checks the presence of white salt deposits on the surface of bricks.

• Dimension test ensures that the bricks meet the requ...read more

The grades of steel refer to different classifications based on their chemical composition and physical properties.

• Steel grades are typically designated by a combination of numbers and letters.

• Common steel grades include A36, A572, and A514.

• Each grade has specific characteristics that make it suitable for different applications.

• Grades of steel can vary in terms of strength, hardness, corrosion resistance, and weldabili...read more

Nominal mix design is a method of proportioning ingredients in concrete using nominal ratios.

• Nominal mix design uses approximate ratios of ingredients instead of exact measurements.

• It is commonly used for small construction projects where precise measurements are not necessary.

• For example, a nominal mix of 1:2:4 would mean one part cement, two parts sand, and four parts coarse aggregate.

• Nominal mix design is not recomm...read more

The question is about requirements for WPS PQR, piping, and tank RT.

• WPS (Welding Procedure Specification) and PQR (Procedure Qualification Record) are required for welding processes.

• Piping requirements include material selection, design, fabrication, installation, and testing.

• Tank RT (Radiographic Testing) requirements involve inspecting welds and joints for defects using X-rays or gamma rays.

• All of these requirements ...read more

Slump test is a method to measure the workability of concrete by observing the consistency and flow of the concrete mix.

• Prepare a slump cone by lubricating the inside surface and placing it on a smooth, flat surface.

• Fill the cone with concrete in three layers, each layer tamped with a rod 25 times.

• Remove excess concrete, level the top, and lift the cone vertically. Measure the slump of the concrete.

• Record the slump mea...read more

To fill a cube, ensure all sides are properly aligned and filled with the material. Check for any gaps or air pockets.

• Ensure the cube mold is clean and dry before filling.

• Pour the material into the mold slowly and evenly to prevent air pockets.

• Use a vibrating table to help settle the material and remove any air bubbles.

• Check for any leaks or cracks in the mold before filling to prevent material from leaking out.

• After f...read more

Soil compactor drum thickness is an important factor for compaction efficiency and durability.

• The drum thickness of a soil compactor is typically between 0.5 to 1 inch.

• Thicker drums are more durable and can withstand heavier loads.

• The material of the drum also affects its thickness and durability, with steel drums being thicker than plastic ones.

• Regular maintenance and inspection of the drum thickness is important to e

Preventive maintenance of excavator involves regular inspections, lubrication, and replacement of worn parts to ensure optimal performance and longevity.

• Regularly inspecting the excavator for signs of wear and tear

• Lubricating moving parts to prevent friction and reduce wear

• Replacing worn out parts such as filters, belts, and hoses

• Checking fluid levels and topping up as needed

• Cleaning the excavator to prevent buildup of...read more

There are several types of steel tests including tensile test, hardness test, impact test, and bend test.

• Tensile test measures the strength of steel by pulling it until it breaks.

• Hardness test determines the resistance of steel to indentation or scratching.

• Impact test evaluates the toughness of steel by subjecting it to sudden loading.

• Bend test assesses the ductility of steel by bending it to a specific angle without f