L&T Construction Interview Questions, Process, and Tips for Freshers

Q1. Tell me about yourself
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Q2. Total experience
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Q1. About working areas
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Q2. How to do
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Hard but medium not very easy but not so hard

Q1. M15 ratio? In construction
Ans. 
M15 ratio is the mix ratio of cement, sand, and aggregate in construction.
• M15 ratio is commonly used in construction for preparing concrete.

• It refers to the mix ratio of 1:2:4, which means 1 part cement, 2 parts sand, and 4 parts aggregate.

• This ratio is suitable for general construction purposes where high strength is not required.
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Q2. Initial setting time of rhc?
Ans. 
Initial setting time of rhc is the time taken for the cement paste to lose its plasticity and become rigid.
• Initial setting time is typically around 30 minutes for ordinary Portland cement.

• It is influenced by factors such as temperature, water-cement ratio, and type of cement used.

• Testing for initial setting time is done using the Vicat apparatus.
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Q1. Why should we hire you?
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Q2. Why you want this job?
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Normal SubPar Questions

Q1. Explain working of Transformer
Ans. 
A transformer is a device that transfers electrical energy between two or more circuits through electromagnetic induction.
• Transformers work on the principle of electromagnetic induction

• They have primary and secondary coils wound around a core

• Step-up transformers increase voltage while step-down transformers decrease voltage

• Efficiency of a transformer is determined by its core material and design
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Q2. Explain working of Synchronous Motor
Ans. 
Synchronous motor is a type of AC motor where the rotation of the shaft is synchronized with the frequency of the supply current.
• Synchronous motor has a rotor with electromagnets and stator with field windings.

• The rotor rotates at the same speed as the rotating magnetic field produced by the stator.

• It requires DC excitation to create a magnetic field in the rotor.

• Used in applications where constant speed is required, s
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Q3. Explain method of Torque Variation of Squirrel Cage Motor.
Ans. 
Torque variation in squirrel cage motors is achieved by changing the rotor resistance.
• Torque in squirrel cage motors can be varied by changing the rotor resistance.

• Increasing the rotor resistance will increase the torque produced by the motor.

• Decreasing the rotor resistance will decrease the torque produced by the motor.

• This method is commonly used in applications where variable torque is required, such as in fans or p
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Q4. Multiple questions on Slip of Induction Motor
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Q5. Speed and Torque Variation Methods
Ans. 
Speed and torque variation methods are used in electrical systems to control the performance of motors.
• Speed variation methods include changing the frequency of the power supply or using variable speed drives.

• Torque variation methods involve adjusting the voltage or current supplied to the motor.

• Examples of speed variation methods include VFDs (Variable Frequency Drives) and soft starters.

• Examples of torque variation m...read more
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Easy and basic questions

Q1. What is pavement and how they are constructed ?
Ans. 
Pavement is a hard surface constructed on top of a base layer to support vehicular or foot traffic.
• Pavements are typically made of materials like asphalt, concrete, or bricks.

• They are constructed by first preparing the subgrade, then adding a base layer for support, followed by the pavement material.

• Pavements can be designed for different traffic loads and environmental conditions.

• Proper drainage is important in paveme...read more
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Q2. What is the width of pavement ?
Ans. 
The width of pavement varies depending on the type of road and number of lanes.
• Width of pavement can range from 10 feet for a single lane road to over 100 feet for a multi-lane highway

• Standard width for a two-lane road is typically around 24 feet

• Interstate highways can have pavement widths of up to 48 feet per lane
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3 hours of test with basic apptitude questions

Q1. Tell me about yourself
Ans. 
I am a recent graduate with a degree in Computer Science and a passion for coding and problem-solving.
• Recent graduate with a degree in Computer Science

• Passionate about coding and problem-solving

• Experience with programming languages such as Java, Python, and C++

• Completed internships at tech companies like Google and Microsoft
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Logical and reasoning

Q1. Basics of structural engineering
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