Larsen & Toubro Limited Pipeline Designer Interview Questions and Answers

A line chart for a 10 km action plan with safety precautions, procurement, manpower, and equipment.

• Identify safety precautions needed for the project

• Procure necessary equipment and manpower

• Create a timeline for the project

• Allocate resources efficiently

• Ensure compliance with regulations and standards

• Monitor progress and adjust plan as needed

To calculate pup-piece length for a 12 inch pipeline with two sections already lowered and overlap 5m and s-bend rolling, two 90 degree LR bends.

• Calculate the total length of the pipeline

• Subtract the length of the two sections already lowered and overlap 5m

• Add the length of the two 90 degree LR bends

• Divide the result by 2 to get the length of each pup-piece

Collapse and damage percentage for HDD crossings are calculated based on various factors such as soil type, borehole diameter, and drilling fluid properties.

• Collapse percentage is calculated using the Mohr-Coulomb failure criterion

• Damage percentage is calculated based on the tensile strength of the pipe and the bending stress induced during the pullback process

• Factors such as soil type, borehole diameter, and drilling ...read more

Methodology for rock excavation involves drilling, blasting, and removal of debris. Quantity is measured by volume or weight.

• Drilling holes in rock using specialized equipment

• Placing explosives in the holes and detonating them

• Removing the debris using heavy machinery

• Measuring the quantity of rock excavated by volume or weight

• Using software to calculate the amount of explosives needed for a specific excavation project