20+ Larsen & Toubro Limited Civil Engineer Interview Questions and Answers

Curing formalities for precast segments involve a specific process to ensure strength and durability.

• Pre-wetting the segments before casting

• Covering the segments with wet burlap or plastic sheets

• Maintaining a moist environment for a specific duration

• Using curing compounds or membranes to prevent moisture loss

• Monitoring and controlling temperature and humidity during curing

• Allowing sufficient curing time before handling or loading the segments

Concrete quality refers to the strength, durability, and consistency of the concrete used in construction.

• Concrete quality is determined by the ratio of cement, water, and aggregates used in the mix.

• The strength of concrete is measured in pounds per square inch (psi) and is determined by the amount of cement used in the mix.

• Durability of concrete is determined by its ability to resist weathering, erosion, and chemical attacks.

• Consistency of concrete refers to its workability ...read more

Civil engineering is a branch of engineering that deals with the design, construction, and maintenance of the built environment.

• Civil engineers design and oversee the construction of buildings, roads, bridges, and other infrastructure.

• They use their knowledge of physics, mathematics, and materials science to ensure that structures are safe, efficient, and sustainable.

• Civil engineers also play a key role in managing natural resources, such as water and land, and protecting the...read more

Intake well excavation involves several steps to ensure safety and efficiency.

• Site preparation and marking

• Excavation of the well using appropriate equipment

• Installation of support systems to prevent collapse

• Lining the well with concrete or other materials

• Installation of pumps and other equipment

• Testing and commissioning of the well

• Backfilling and site restoration

Development length of steel is the length of bar required to transfer the stress from steel to concrete.

• It is the length of steel bar required to transfer the stress from steel to concrete

• It depends on the diameter of the bar, type of steel, and the grade of concrete

• It is calculated using the formula Ld = (phi x fy x Ast) / (4 x sigma_st x sqrt(fck))

• For example, for a 20mm diameter bar, grade Fe500 steel, and M20 grade concrete, the development length is 44cm

The previous project cost was within the allocated budget.

• The cost of the previous project was carefully managed to ensure it stayed within the allocated budget.

• Efficient cost control measures were implemented to prevent any overspending.

• Regular monitoring and tracking of expenses were conducted to ensure adherence to the budget.

• Cost-saving strategies, such as value engineering, were employed to optimize project expenses.

• The project team collaborated closely with suppliers an...read more

Highway engineering is a branch of civil engineering that deals with the design, construction, and maintenance of highways and roads.

• It involves planning and designing highways and roads to ensure safe and efficient transportation.

• Highway engineers consider factors such as traffic volume, speed, and safety when designing roads.

• They also oversee the construction and maintenance of highways and roads to ensure they meet safety standards and are in good condition.

• Examples of hig...read more

Safety on site refers to the measures and protocols put in place to ensure the well-being and protection of workers and visitors at a construction site.

• Implementing proper safety training for all workers

• Enforcing the use of personal protective equipment (PPE)

• Regular inspections of equipment and machinery

• Maintaining a clean and organized work environment

• Having emergency response plans in place

• Ensuring compliance with safety regulations and standards

The minimum slump of concrete should be 25 mm according to standards.

• The minimum slump of concrete is typically specified by standards such as ASTM or ACI.

• A slump test is conducted to measure the consistency of concrete, with a minimum value of 25 mm usually required.

• A higher slump value indicates a more workable concrete mix, while a lower value may result in difficulties during placement and compaction.

Quality is the measure of excellence or superiority of something.

• Quality is meeting or exceeding customer expectations.

• It involves consistency, reliability, and durability.

• Quality can be subjective and vary depending on the context.

• Examples include high-quality construction materials, accurate engineering designs, and reliable infrastructure.

• Quality control measures are implemented to ensure standards are met.

Cost analysis involves evaluating the expenses associated with a project to determine its financial feasibility.

• Identify all costs associated with the project, including materials, labor, equipment, permits, and overhead expenses.

• Estimate the quantities of materials and labor required for the project to calculate costs accurately.

• Consider any potential cost savings or cost overruns that may impact the overall budget.

• Compare the estimated costs with the available budget to ens...read more

Strength of M20 concrete refers to its compressive strength after 28 days of curing.

• M20 concrete has a characteristic compressive strength of 20 MPa (megapascals) after 28 days.

• The strength of M20 concrete can vary depending on factors like water-cement ratio, curing conditions, and quality of materials used.

• Testing is typically done by casting cubes or cylinders and subjecting them to compression tests.

• Strength of M20 concrete is important for ensuring the structural integri...read more

Strength of concrete is its ability to resist compressive stress.

• Concrete strength is measured in terms of compressive strength.

• It is affected by factors such as water-cement ratio, curing time, and aggregate size.

• The strength of concrete can be improved by using additives such as fly ash or silica fume.

• Concrete with higher strength is used in structures such as bridges and high-rise buildings.

Grade M25 is a mix of concrete with a compressive strength of 25 megapascals after 28 days.

• M25 is a standard mix of concrete used in construction.

• It is made up of 1 part cement, 1 part sand, and 2 parts coarse aggregate.

• It has a compressive strength of 25 MPa after 28 days of curing.

• It is commonly used in the construction of buildings, bridges, and other structures.

• M25 is suitable for moderate exposure conditions and can withstand moderate wear and tear.

Quantity of materials is a crucial aspect of any civil engineering project.

• The quantity of materials needed depends on the project specifications and design.

• Calculations are done based on the required strength, durability, and safety factors.

• Factors such as wastage, transportation, and storage also need to be considered.

• Regular monitoring and updating of material quantities is necessary to ensure project success.

• Examples of materials include concrete, steel, asphalt, and aggr...read more

Cement is a binding material used in construction to hold together different components of concrete.

• Cement is a fine powder made from a mixture of limestone, clay, and other minerals.

• It reacts with water to form a paste that hardens and binds the aggregates together.

• It provides strength and durability to structures like buildings, bridges, and roads.

• Different types of cement are available for specific applications, such as Portland cement, slag cement, and fly ash cement.

Site management involves planning, organizing, and coordinating resources to ensure a successful construction project.

• Develop a detailed project plan outlining tasks, timelines, and resources

• Assign roles and responsibilities to team members

• Regularly communicate with stakeholders to provide updates and address concerns

• Implement safety protocols to ensure a secure work environment

• Monitor progress and adjust plans as needed to stay on track

• Utilize technology such as project mana...read more

To determine the workability of concrete mix

• To ensure the concrete mix has the desired consistency for proper placement and compaction

• To assess the water content in the concrete mix

• To check the quality of the concrete mix and its ability to flow and settle

• To prevent issues such as segregation and bleeding in the concrete mix

• To meet the specifications and requirements of the project

• Example: If the slump test result shows a low value, it indicates a stiff mix that may be diffic...read more

Strength of material refers to the ability of a material to withstand applied forces without failing.

• Strength of material is typically measured through tensile, compressive, and shear tests.

• Factors affecting strength include material composition, manufacturing process, and environmental conditions.

• Examples of strong materials include steel, concrete, and titanium.

• Understanding strength of material is crucial in civil engineering for designing structures that can safely suppor...read more