Larsen & Toubro Limited Site Engineer Interview Questions, Process, and Tips

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
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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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Q1. What is density of steel
Ans. 
Density of steel is approximately 7.85 g/cm^3
• The density of steel is around 7.85 grams per cubic centimeter

• Density can vary slightly depending on the specific type of steel

• Steel is a commonly used material in construction and manufacturing due to its strength and durability
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Q2. What is defined M20
Ans. 
M20 is a mix of concrete with a compressive strength of 20 megapascals.
• M20 refers to the mix of concrete with a compressive strength of 20 megapascals.

• It is commonly used in construction for residential buildings, pavements, and small-scale projects.

• The mix ratio for M20 concrete is 1:1.5:3, which means 1 part cement, 1.5 parts sand, and 3 parts aggregate.
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Q3. What is the weight of D32 steel baar
Ans. 
The weight of D32 steel bar is approximately 7.65 kg per meter.
• The weight of D32 steel bar is calculated based on its dimensions and density

• The density of steel is around 7.85 g/cm^3

• To calculate the weight, you need to know the length of the bar

• For example, a 1 meter long D32 steel bar would weigh approximately 7.65 kg
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Q4. What is density of cement Ans-1440kg/m3
Ans. 
The density of cement is 1440kg/m3.
• Density of cement is a measure of its mass per unit volume.

• It is commonly expressed in kilograms per cubic meter (kg/m3).

• The density of cement can vary slightly depending on the type and brand.

• For example, Portland cement typically has a density of around 1506kg/m3.
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Q5. What is ratio of M25 grade concrete? Ans-1:1:2
Ans. 
The ratio of M25 grade concrete is 1:1:2, which means 1 part cement, 1 part sand, and 2 parts aggregate.
• M25 grade concrete has a ratio of 1:1:2 for cement, sand, and aggregate respectively

• This ratio indicates the proportion of each ingredient in the concrete mix

• For example, for every 1 bag of cement, 1 cubic foot of sand and 2 cubic feet of aggregate are used
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Q1. What is stater ?
Ans. 
A stater is a unit of weight used in ancient Greece for coins.
• Staters were typically made of silver or gold.

• The most famous stater is the Athenian silver tetradrachm, featuring the owl of Athena.

• Staters were used as a form of currency in ancient Greek city-states.
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Q2. How calculate weight of one meter steel bar formula ?
Ans. 
The weight of one meter steel bar can be calculated using a specific formula.
• The formula to calculate the weight of one meter steel bar is: Weight = (D^2/162) * L, where D is the diameter of the steel bar in mm and L is the length of the steel bar in meters.

• To calculate the weight of one meter steel bar, you need to know the diameter of the steel bar and the density of steel (which is 7850 kg/m^3).

• For example, if the d...read more
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The duration of the aptitude test was 120 minutes (2 hrs), for 130 questions (including 100 Logical Reasoning, Verbal ability, Quantitative Ability and other 30 questions from TECHNICAL DOMAIN), Mine was Civil Background. Technical Questions were quite moderate to tough. Whereas, first 100 questions of LR, VA, Quant was quite easy and short.

Q1. Technical interview mostly revolved around internships and College Projects that we did. Very few Structural design questions and 1 or 2 from soil mech.
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Q1. Based mainly on you CGPA, If CGPA is above 9, chances are quite high for getting selected, even if interview doesn't go well. (This was my case, I had CGPA of 9.56)
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Q2. About Family background, future plans, Why not M.Tech after Btech?
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Q1. Deptt. Interview
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Q2. Only E&M (OHE )
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Q3. Material & Erection knowledge
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Q4. Adjustment and sed checking
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Q5. Earthing & Bonding
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Q1. About nptel Mechanical engineering related questions
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