Larsen & Toubro Limited Assistant Civil Construction Manager Interview Questions and Answers

Types of compactors include plate compactors, vibratory rollers, and rammer compactors.

• Plate compactors are used for small-scale compaction of soil and asphalt.

• Vibratory rollers are used for larger areas and provide a smooth finish.

• Rammer compactors are used for compacting cohesive soils in confined spaces.

Density of soil refers to the mass of soil per unit volume.

• Density of soil is typically measured in units of grams per cubic centimeter (g/cm^3) or kilograms per cubic meter (kg/m^3).

• The density of soil can vary depending on factors such as composition, moisture content, and compaction.

• For example, sandy soil tends to have a lower density compared to clayey soil.

• Compacted soil generally has a higher density than loose ...read more

Types of rock commonly encountered in construction include sedimentary, igneous, and metamorphic. Blasting methods include controlled blasting, presplitting, smooth blasting, and line drilling.

• Sedimentary rock is formed from sediment such as sand, silt, or clay. Examples include limestone and sandstone.

• Igneous rock is formed from cooled and solidified magma or lava. Examples include granite and basalt.

• Metamorphic rock ...read more

Safety during blasting is maintained through proper planning, communication, training, and monitoring.

• Develop a detailed blasting plan that includes safety procedures and precautions.

• Ensure all personnel involved in the blasting operation are properly trained and certified.

• Implement exclusion zones to keep unauthorized personnel away from the blast site.

• Use warning signals and alarms to alert workers before blasting.

• Mo...read more

Sieve analysis is a method used to determine the particle size distribution of a granular material.

• Sieve analysis involves passing a sample of material through a series of sieves with progressively smaller openings.

• The size of the sieve openings varies, typically ranging from 3 inches to 3 microns.

• The material retained on each sieve is weighed and the percentage of total material retained on each sieve is calculated.

• Th...read more

The time cycle for box girder erection varies depending on factors such as size, complexity, equipment availability, and workforce efficiency.

• Time cycle can range from a few days to several weeks, depending on the project requirements.

• Factors such as weather conditions and site accessibility can also impact the time cycle for box girder erection.

• Efficient planning, coordination, and communication among the construction...read more