Larsen & Toubro Limited Quality Engineer Interview Questions and Answers

Slump mold tolerance refers to the acceptable range of deviation in the height of concrete slumps from the specified value.

• Slump mold tolerance is typically specified in the project's quality control plan or construction specifications.

• It is important to monitor and control slump mold tolerance to ensure the concrete meets the required strength and workability.

• For example, if the specified slump for a concrete mix is 4...read more

The humidity level during the cement consistency test should be maintained at around 50-70%.

• Ideal humidity level for cement consistency test is 50-70%

• High humidity can lead to faster setting time of cement

• Low humidity can lead to longer setting time of cement

Before casting a pier, aspects such as design specifications, material quality, formwork, reinforcement, and curing process should be checked.

• Check design specifications to ensure the pier meets structural requirements

• Verify the quality of materials used for casting the pier

• Inspect the formwork to ensure it is properly constructed and aligned

• Check the reinforcement placement and spacing for adequate strength

• Ensure prop...read more

The code for concrete mix design is typically specified by the project engineer or architect based on the requirements of the project.

• The code for concrete mix design can vary depending on the project specifications and requirements.

• Common codes used for concrete mix design include ACI 211, ASTM C94, and BS 8500.

• The code will specify the required proportions of cement, aggregates, water, and admixtures for the concrete...read more

Constructing a cast pier involves preparing the site, setting up formwork, pouring concrete, and curing the pier.

• Prepare the site by clearing the area and ensuring proper soil compaction.

• Set up formwork to shape the pier and hold the concrete in place during pouring.

• Pour concrete into the formwork, making sure it is properly mixed and compacted.

• Allow the concrete to cure and gain strength before removing the formwork.

• I...read more

Aggregate abrasion value is a measure of the resistance of aggregate to wear by abrasion.

• Aggregate abrasion value is determined by subjecting the aggregate sample to abrasion in a rotating steel drum containing a specified number of steel spheres or rods.

• The sample is then removed from the drum and sieved to determine the weight of the material passing through a specified sieve size.

• The aggregate abrasion value is calc...read more

We are using concrete grade M30 for the pier, pile, and pile cap in our project.

• Concrete grade M30 is commonly used for structures like piers, piles, and pile caps due to its high strength and durability.

• It is important to use the correct concrete grade to ensure the structural integrity and longevity of the project.

• Examples of other concrete grades commonly used in construction include M20, M25, and M40.

Specific gravity of aggregate is the ratio of the weight of a given volume of aggregate to the weight of an equal volume of water.

• Specific gravity is a unitless value that indicates the density of a material compared to the density of water.

• It is typically measured by filling a container with a known volume of aggregate and weighing it, then dividing by the weight of an equal volume of water.

• The specific gravity of agg...read more