J. Kumar Infraprojects QA QC Engineer Interview Questions and Answers

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 st

Frequency tests of construction material as per CPWD

• Frequency tests of construction material are conducted as per the guidelines provided by CPWD (Central Public Works Department).

• The frequency of tests depends on the type of material and its intended use in the construction project.

• CPWD provides specific guidelines for different materials such as cement, aggregates, concrete, steel, etc.

• The tests may include compressi...read more

Brick, plaster, and tile work can be checked by inspecting for proper alignment, levelness, and uniformity.

• Check for proper alignment of bricks and tiles using a straight edge or level.

• Inspect for levelness of plaster using a spirit level.

• Check for uniformity of color and texture in tiles.

• Ensure that the joints between bricks or tiles are consistent in size and shape.

• Look for any cracks or gaps in the plaster or grout ...read more

To check reinforcement as per drawing, use measuring tape and compare with the drawing. If there is a problem in slab steel, check for any missing bars or incorrect placement.

• Use measuring tape to check the length and diameter of reinforcement bars

• Compare the measurements with the drawing to ensure they match

• Check for any missing bars or incorrect placement

• If there is a problem, consult the structural engineer for a so

No, code is not applicable for all material testing procedures.

• Code is primarily used for software testing, not material testing.

• Material testing procedures involve physical tests and measurements.

• Examples of material testing procedures include tensile testing, hardness testing, and impact testing.

Various quality tests are conducted in construction labs to ensure the durability and safety of the structures.

• Concrete compressive strength test

• Aggregate impact value test

• Water absorption test

• Bitumen content test

• Soil compaction test

The procedure for testing soil, concrete, and cement involves various steps and techniques.

• Collect samples of soil, concrete, and cement from the site.

• Perform tests to determine the properties and characteristics of the materials.

• For soil testing, conduct tests such as moisture content, compaction, and permeability.

• For concrete testing, perform tests like compressive strength, slump, and air content.

• For cement testing,...read more