L&T Construction Assistant Engineering Manager Interview Questions, Process, and Tips

Selection of a cable involves considering factors like voltage rating, current carrying capacity, insulation material, and environmental conditions.

• Determine the voltage rating required for the application.

• Calculate the current carrying capacity needed based on the load.

• Select the appropriate size and type of cable based on the current rating.

• Consider the insulation material suitable for the environment (e.g. PVC, XLPE...read more

Load factor is the ratio of the average load to the maximum load that a system can handle.

• Load factor is calculated by dividing the average load by the maximum load capacity.

• It is used to measure the efficiency of a system or equipment in handling varying loads.

• For example, a power plant with a load factor of 0.8 means it is operating at 80% of its maximum capacity.

The tertiary winding in a power transformer is important for providing a path for zero-sequence currents and reducing harmonics.

• Provides a path for zero-sequence currents, which helps in balancing the three-phase system

• Reduces harmonics in the system, improving power quality

• Helps in limiting fault currents and improving the overall efficiency of the transformer

To check if a lightning arrestor is working fine, you can perform visual inspections, check for physical damage, test for continuity, and monitor surge protection levels.

• Perform visual inspections for any signs of physical damage or wear

• Check for loose connections or corrosion on the lightning arrestor

• Test for continuity using a multimeter to ensure proper electrical connection

• Monitor surge protection levels to ensure ...read more