L&T Construction Interview Questions, Process, and Tips

Electrical department all Technical questions and General averness questions in MCQ type

Q1. Electrical all Technical questions
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Q2. 1.Types of Transformer 2.Types of Electrical Drives 3. What is the frequence of India 4. What is your goal
Ans. 
Types of transformers include power transformers, distribution transformers, instrument transformers. Types of electrical drives include AC drives, DC drives, servo drives.
• Power transformers are used in high voltage transmission and distribution systems.

• Distribution transformers are used to step down voltage for use in homes and businesses.

• Instrument transformers are used for measuring voltage and current in power syst...read more
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Q1. 1. Tell me about yourself 2. What is your greatest strength 3. Why do you want to work here 4. Why should we choose you
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Q1. Which pillar are good
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Q2. What is uniform loading
Ans. 
Uniform loading refers to distributing a load evenly across a surface or structure.
• Uniform loading helps prevent stress concentrations and ensures stability.

• It is commonly used in engineering and construction to ensure the safety and integrity of structures.

• Examples include evenly distributed weight on a shelf or uniform pressure on a bridge.
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Q1. What are the steps for selection of a cable?
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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
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Q2. What is load factor?
Ans. 
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.
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Q3. What is the importance of the tertiary winding in a power transformer?
Ans. 
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
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Q4. How to check a lightning arrestor is working fine or not?
Ans. 
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
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Q1. Technical and aptitude
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Q2. Reasoning aptitude and technical
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Q1. About transmission line
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Q2. Power system and electrical machine
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