Larsen & Toubro Limited Site Engineer Interview Questions and Answers

Diploma in mechanical engineering thermal engineering or manufacturing

Q1. Thermodynamics law
Ans. 1st Law of Thermodynamics - Energy cannot be created or destroyed. 2nd Law of Thermodynamics - For a spontaneous process, the entropy of the universe increases. 3rd Law of Thermodynamics - A perfect crystal at zero Kelvin has zero entropy.
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Q2. Gear and type four stock and two stock
Ans. The main difference between a 4-stroke engine and a 2-stroke engine is that a 4-stroke engine goes through four stages, or two complete revolutions, to complete one power stroke, while a 2-stroke engine goes through 2 stages, or one complete revolution, to complete one power stroke.
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Q3. Stress and strain or strain and stress graph
Ans. The Stress-Strain curve is a type of graph plotted between “stress and strain”. This graph explains the relationship between “stress and strain” of different materials when tensile stress is applied to them. This curve is plotted on the basis of an experimental result.
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Q4. Types of mechanical properties
Ans. 
Mechanical properties refer to the behavior of materials under applied forces.
• Strength - ability to withstand applied stress without failure

• Hardness - resistance to deformation or scratching

• Elasticity - ability to return to original shape after deformation

• Ductility - ability to deform without breaking

• Toughness - ability to absorb energy before fracturing
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Q5. Types of heat treatment
Ans. 
Heat treatment is a process used to alter the physical and sometimes chemical properties of a material through heating and cooling.
• Annealing: heating a material to a specific temperature and then slowly cooling it to relieve internal stresses and increase ductility

• Quenching: rapid cooling of a material to increase hardness

• Tempering: heating a material to a specific temperature and then cooling it to improve toughness

• No...read more
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Q6. Heat transfer and types
Ans. 
Heat transfer is the movement of heat from one object to another due to a temperature difference.
• There are three main types of heat transfer: conduction, convection, and radiation.

• Conduction is the transfer of heat through a material without any movement of the material itself.

• An example of conduction is when a metal spoon in a hot cup of tea becomes hot.

• Convection is the transfer of heat through the movement of fluids...read more
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Q7. Types of lathe machine
Ans. 
Types of lathe machines include engine lathe, turret lathe, and center lathe.
• Engine lathe is the most common type used for general purpose turning.

• Turret lathe has a turret tool post for quick tool changes.

• Center lathe is used for precision work and has a tailstock for support.

• Other types include automatic lathe, CNC lathe, and vertical lathe.
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Q1. What are the key considerations in excavation for water supply installation?
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Q2. Excavation engineer
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Q1. How do you guys handle emergency situations?
Ans. 
We have a designated emergency response team trained to handle various emergency situations.
• Designated emergency response team trained for various emergency scenarios

• Regular emergency drills and training sessions to ensure preparedness

• Established communication protocols to quickly coordinate response efforts

• Access to emergency supplies and equipment for immediate assistance

• Collaboration with local authorities and emerg...read more
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Q1. Good telephonic interview
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Q2. Call XXXXX
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Q3. Site engineer telephonic
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Q4. *****
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Q1. Foundations: Be prepared to discuss different types of foundations (shallow, deep, spread, etc.) and their applications.
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Q2. Technical Skills & Knowledge: Foundations:
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Q3. Structural Integrity:
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Q4. Challenges Faced:
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Q5. Environmental Assessments:
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Q6. Project Experience & Skills:
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Q1. Different types of mix design ?
Ans. 
Different types of mix design include nominal mix, standard mix, and design mix.
• Nominal mix design involves using standard ratios without testing.

• Standard mix design follows specific guidelines and proportions.

• Design mix design is customized based on specific project requirements.

• Examples: M20, M30, M40 mixes.
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Q2. Overlaping steel?
Ans. 
Overlapping steel refers to the practice of placing steel bars on top of each other to increase strength and stability in construction.
• Overlapping steel bars helps distribute loads evenly and prevent structural failure.

• Properly overlapping steel bars is crucial for ensuring the structural integrity of a building.

• Commonly used in reinforced concrete structures such as beams, columns, and slabs.

• Overlap length and spacing...read more
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Q3. Soil Compaction test
Ans. Load bearing capacity of soli for any structural work test its density
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Q4. Ratio of mortar for plaster work
Ans. 
The ratio of mortar for plaster work is typically 1:3 to 1:6, depending on the type of surface and desired finish.
• The most common ratio for plaster work is 1 part cement to 3 parts sand.

• For a smoother finish, the ratio can be adjusted to 1 part cement to 4 or 5 parts sand.

• In some cases, a 1:6 ratio (1 part cement to 6 parts sand) may be used for rough surfaces or base coats.

• Water should be added gradually to achieve th...read more
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Q5. Quantity of brick in 50 squre meter
Ans. 
The quantity of bricks in 50 square meters depends on the size of the bricks and the thickness of the wall being built.
• Calculate the area of the wall in square meters

• Determine the size of the bricks being used (e.g. standard size is 0.22m x 0.1m x 0.07m)

• Calculate the number of bricks needed by dividing the wall area by the area of one brick
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Q6. Bar bending schedule
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