L&T Construction Interview Questions, Process, and Tips

Q1. What is the denisty of flyash blocks
Ans. 
The density of flyash blocks varies depending on the manufacturing process and composition.
• Flyash blocks can have a density ranging from 600 kg/m3 to 1600 kg/m3.

• The density is influenced by factors such as the amount of fly ash, cement, and water used in the mix.

• Higher density blocks are typically stronger and more durable.

• Density can be measured using a variety of methods, including water displacement and weighing.

• It ...read more
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Q2. How do you cast concrete cubes
Ans. 
Concrete cubes are cast by filling a cube-shaped mold with freshly mixed concrete and allowing it to cure.
• Prepare the mold by cleaning and oiling it to prevent sticking.

• Mix the concrete according to the desired strength and consistency.

• Fill the mold with the concrete, making sure to compact it well and eliminate any air pockets.

• Smooth the surface of the concrete and cover the mold with a plastic sheet to prevent moistu...read more
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Q3. How do deal with safety issues at site
Ans. 
I prioritize safety by implementing strict protocols, conducting regular inspections, and providing proper training to workers.
• Establish and enforce safety protocols and guidelines

• Conduct regular safety inspections and audits

• Provide proper training and education to workers on safety procedures

• Encourage workers to report any safety concerns or hazards

• Investigate and address any safety incidents or accidents promptly

• Stay...read more
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Q4. What is the productivity of a Carpenter
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The productivity of a carpenter depends on various factors such as experience, skill level, tools used, and complexity of the project.
• The productivity of a carpenter can be measured in terms of the amount of work completed in a given time frame.

• Factors that affect productivity include the carpenter's experience and skill level, the tools and equipment used, and the complexity of the project.

• For example, a highly skille...read more
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Q5. How much do you add for crank in slab
Ans. 
Crank in slab is added to prevent cracking due to temperature and shrinkage.
• Crank is added to slabs at intervals of 1.5 to 2 meters.

• The amount of crank depends on the thickness of the slab and the expected temperature changes.

• For a 150mm thick slab, 0.15% of steel is added as crank.

• For a 200mm thick slab, 0.12% of steel is added as crank.

• Crank bars are usually 6mm to 10mm in diameter.
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The online test was bit lengthy

Q1. Questions asked from thermodynamics, som,manufacturing.
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Q2. Also from design related question
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Q1. Why Rotation equipment will get sound and vibration.
Ans. 
Rotation equipment can develop sound and vibration due to various reasons such as imbalance, misalignment, wear and tear, or bearing issues.
• Imbalance in rotating parts can cause vibration and noise. For example, a misaligned shaft or uneven distribution of mass.

• Misalignment of components can lead to vibration and noise. For instance, if a motor shaft is not properly aligned with the pump shaft.

• Wear and tear in bearings...read more
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Q2. What is meant breathers and purpose.
Ans. 
Breathers are devices used to prevent the build-up of pressure or vacuum within a sealed container or system.
• Breathers allow for the exchange of air to prevent pressure differentials.

• They are commonly used in hydraulic systems to prevent contamination.

• Breathers can also be used in storage tanks to prevent the formation of a vacuum.

• The purpose of breathers is to maintain optimal operating conditions within a system.
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Q3. What is purposes of Inter cooler in Air line.
Ans. 
Inter cooler in an air line is used to cool down the compressed air before it enters the engine, increasing its density and efficiency.
• Increases air density for better combustion efficiency

• Reduces the risk of engine knocking or detonation

• Improves overall engine performance and power output
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Q4. What is Periodical Maintenance
Ans. 
Periodical maintenance refers to regular scheduled maintenance tasks performed on equipment or systems to ensure optimal performance and prevent breakdowns.
• Periodical maintenance involves routine inspections, cleaning, lubrication, and adjustments.

• It helps to identify and address potential issues before they become major problems.

• Examples include changing the oil in a car every 5,000 miles, inspecting HVAC systems quar
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Q5. What is Check list
Ans. 
A checklist is a list of items or tasks that need to be completed or verified.
• Used to ensure all necessary tasks are completed

• Can be used in various fields such as project management, quality control, and safety inspections

• Examples: pre-flight checklist for pilots, grocery shopping list, daily to-do list
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Q6. What is A,B,C&D Service.
Ans. 
A,B,C&D Service refers to different levels of maintenance services provided for equipment or machinery.
• A Service: Regular maintenance to prevent breakdowns

• B Service: Intermediate level maintenance to address minor issues

• C Service: Major maintenance to address significant issues

• D Service: Overhaul or complete refurbishment of the equipment

• Example: A car manufacturer may offer A, B, C, and D services for their vehicles
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Q7. What is Tail light,high intensity light Radium Stickers.
Ans. 
Tail light, high intensity light Radium Stickers are reflective stickers used on vehicles to enhance visibility and safety.
• Tail light Radium Stickers are placed on the rear of vehicles to make them more visible in low light conditions.

• High intensity light Radium Stickers are used on bicycles, helmets, and other objects to increase visibility to others.

• These stickers contain radium material that reflects light, making t...read more
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Q8. What is the difference of RR,BD &LBD
Ans. 
RR stands for Relative Risk, BD stands for Base Diameter, and LBD stands for Largest Base Diameter.
• RR is a measure of the risk of an event happening in one group compared to another group.

• BD refers to the diameter of the base of a structure or object.

• LBD is specifically referring to the largest diameter of the base of a structure or object.

• Example: RR can be used in epidemiology to compare the risk of developing a dise...read more
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Q9. What is PTO in In Power and Documents.
Ans. 
PTO in In Power and Documents stands for Power Take Off, a mechanism used to transfer power from a vehicle's engine to another application.
• PTO is commonly used in trucks and other heavy-duty vehicles to power auxiliary equipment such as hydraulic pumps or generators.

• In In Power and Documents, PTO may refer to the specific settings or configurations related to power take off systems in vehicles.

• Understanding PTO in In P...read more
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Q10. What is LCV and HDD Vehicles
Ans. 
LCV stands for Light Commercial Vehicles and HDD stands for Heavy Duty Vehicles.
• LCV vehicles are designed for transporting goods or passengers with a gross vehicle weight of up to 3.5 tons.

• Examples of LCV vehicles include vans, pickup trucks, and small buses.

• HDD vehicles are designed for heavy-duty tasks such as construction, mining, or transportation of heavy loads.

• Examples of HDD vehicles include dump trucks, tractor
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Q11. What is showing "W" in 15W/40 Oil
Ans. 
The 'W' in 15W/40 oil stands for winter, indicating the oil's viscosity in cold temperatures.
• The 'W' stands for 'winter' in multi-grade oils, indicating the oil's viscosity in cold temperatures

• The number before the 'W' (15 in this case) represents the oil's viscosity at low temperatures

• The number after the 'W' (40 in this case) represents the oil's viscosity at high temperatures
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Q12. If Bolt Thired is 20 mm . What will be Size of bolt head size in mm
Ans. 
The size of the bolt head will typically be larger than the bolt thread size.
• The size of the bolt head is usually larger than the bolt thread size for proper grip and torque application.

• Common sizes for bolt heads include 22mm, 24mm, 27mm, etc.

• The size of the bolt head is determined based on the application and required torque specifications.
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Q13. In Ball bearing Number is 6405. What is inserting Shaft size in mm.
Ans. 
The inserting shaft size for a ball bearing number 6405 is typically 25 mm.
• The inserting shaft size for ball bearing 6405 is usually 25 mm.

• The shaft size can vary depending on the specific design and application.

• It is important to ensure the correct shaft size is used to prevent damage to the bearing.
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Q1. Outer dia of HDPE pipe and specifications
Ans. 
The outer diameter of HDPE pipe varies based on the intended use and specifications.
• HDPE pipes are available in a range of sizes from 16mm to 2000mm.

• The outer diameter of HDPE pipe is typically larger than the inner diameter.

• The thickness of the pipe wall also varies based on the intended use and pressure requirements.

• HDPE pipes are commonly used for water supply, gas distribution, and sewage systems.
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Q2. Work process how to handle contractor and local people how to exicute SOP
Ans. 
To handle contractors and local people, we follow a structured process and execute SOPs.
• We establish clear communication channels with contractors and local people.

• We ensure that all parties understand the project goals and objectives.

• We provide training and support to contractors and local people on the SOPs.

• We monitor and evaluate the performance of contractors and local people regularly.

• We address any issues or conc...read more
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Q1. All Question Related to resume and experience in your privous jobs And Project.
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Q2. All Testing, site related work question, MMS, DC & AC. Quality related documents work. FQP.
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General Aptitude with core technical questions.

Q1. Afterwards there were technical interview along with HR.
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Q2. Introduce Yourself. Tell something about your family background. Tell something about your college project. Difference between annealing and normalising. Write a extempore on "Should 75% be mandatory?
Ans. 
I am a Graduate Engineer Trainee with a strong family background and experience in college projects. I can explain the difference between annealing and normalising and provide an extempore on the mandatory 75% rule.
• Family background: My father is a civil engineer and my mother is a teacher. They have always encouraged me to pursue my passion for engineering.

• College project: I worked on a project to design and develop a...read more
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