Interview experience
L&T Interview Questions and Answers (2026)
Overview
Section titled “Overview”Larsen & Toubro’s core engineering GET hiring (civil, mechanical, electrical) runs a 4-stage process - a large branch-domain-plus-aptitude online test, a technical interview, a distinctive final interview with the business unit’s IC head, and HR - built around L&T’s construction and heavy-engineering project execution culture.
L&T interview process at a glance
Section titled “L&T interview process at a glance”| Round | Duration | What it tests |
|---|---|---|
| Online Assessment | ~120 min, 130 questions | 40 domain-specific (branch-wise) + 30 verbal + 30 logical + 30 quantitative |
| Technical Interview | 30-45 min | Branch-specific fundamentals, general aptitude |
| Final Interview (sometimes with IC head) | 30-45 min | Learning attitude, innovation, safety awareness, cost-consciousness |
| HR Interview | ~30 min | Background, motivation, project-site relocation |
Online Assessment
Section titled “Online Assessment”A large, structured test: 130 questions in about 120 minutes, split into a 40-question domain section (numerical and theoretical, specific to your branch) and 90 questions of verbal, logical reasoning, and quantitative aptitude (30 each). There’s no negative marking and you can navigate freely between questions.
Common questions
- Branch-domain numericals and theory (structural analysis/concrete technology for civil, thermodynamics/machine design for mechanical, circuits/machines for electrical)
- Quantitative aptitude - percentages, time-speed-distance, ratios
- Logical reasoning - puzzles, sequences, data sufficiency
- Verbal ability - grammar, comprehension, vocabulary
Technical Interview
Section titled “Technical Interview”Goes deeper into your branch fundamentals from the online assessment’s domain section, plus general aptitude and a look at your final-year project.
Common questions
- Core branch fundamentals at a deeper level than the OA (structural design, thermodynamics, or power systems depending on discipline)
- Walk through your final-year project - design assumptions and outcomes
- Basic aptitude and reasoning follow-ups
- Explain a core-subject concept you find difficult and why
Round-by-round breakdowns are on the L&T interview experience page.
Final Interview (sometimes with the business unit’s IC head)
Section titled “Final Interview (sometimes with the business unit’s IC head)”A distinctive closing technical/managerial round, on some drives conducted directly by the In-Charge (IC) head of the hiring business unit. It’s technical and domain-related, but explicitly assesses learning attitude, innovation, and - given L&T’s construction and heavy-engineering context - safety and cost awareness.
Common questions
- How would you approach a safety-versus-deadline conflict on a project site?
- Where do you see scope for cost optimization in a typical project of your branch?
- What’s something new you learned recently, outside your coursework?
- Domain questions probing genuine understanding rather than memorized answers
HR Interview
Section titled “HR Interview”A closing ~30-minute round on personal background, motivation, career goals, and communication, with a strong emphasis on willingness to work at project sites.
Common questions
- Tell me about yourself and why L&T
- Are you ready to relocate anywhere in India and work at a project site?
- How would you cope with living and working at a remote construction or project site?
- Long-term career goals and notice-period questions
Sample answer frameworks for each of these are on the L&T HR interview questions page.
Core L&T engineering vs. L&T Technology Services (LTTS)
Section titled “Core L&T engineering vs. L&T Technology Services (LTTS)”This page scopes to core Larsen & Toubro engineering/construction GET hiring - civil, mechanical, and electrical roles across L&T’s construction, heavy engineering, and infrastructure businesses, where project-site posting and safety/cost discipline are central to the interview. L&T Technology Services (LTTS) is a separate, publicly listed engineering-R&D-services company with its own distinct hiring process and technical focus (embedded systems, mechanical CAD/CAE, software for engineering clients) - it’s covered separately on this site rather than folded into this page.
Common technical interview questions and answers
Section titled “Common technical interview questions and answers”Q: What does M25 mean in concrete, and what governs its strength? (Civil)
The M stands for mix and 25 is the characteristic compressive strength in N/mm2 at 28 days on a 150 mm cube - defined as the strength below which no more than 5 percent of test results are expected to fall. The nominal proportion is roughly 1:1:2 by volume of cement, fine aggregate, and coarse aggregate, though IS 456 treats M25 and above as design mixes rather than nominal ones. Water-cement ratio is the dominant strength variable: a lower ratio gives higher strength but poorer workability, which is why plasticisers are used instead of adding water. Concrete reaches roughly 65 to 70 percent of its 28-day strength by day 7, and curing for at least 7 days is essential to control shrinkage cracking.
Q: How are shear force and bending moment diagrams related? (Civil)
Shear force at a section is the algebraic sum of vertical forces on one side of it; bending moment is the algebraic sum of moments about that section. The two are linked by calculus - the slope of the shear force diagram equals the load intensity, and the slope of the bending moment diagram equals the shear force - so the bending moment is maximum exactly where the shear force crosses zero. For a simply supported beam of span L carrying a central point load W, the maximum bending moment is WL/4 at midspan; under a uniformly distributed load w it is wL2/8. Those two standard results are the ones L&T panels most often ask you to state from memory.
Q: State the laws of thermodynamics and explain entropy. (Mechanical)
The zeroth law establishes temperature: two bodies each in equilibrium with a third are in equilibrium with each other. The first law is conservation of energy, dQ = dU + dW, so heat added either raises internal energy or does work. The second law states heat cannot spontaneously flow from a colder body to a hotter one without work input, and it introduces entropy - a measure of unavailable energy, or molecular disorder, that never decreases in an isolated system. The third law says entropy approaches a constant, effectively zero, as temperature approaches absolute zero. Entropy is precisely why no real engine reaches the Carnot efficiency of 1 - T_cold/T_hot.
Q: What does a stress-strain curve show, and how do stress and strain differ? (Mechanical)
Stress is internal resisting force per unit area in N/mm2; strain is the dimensionless ratio of change in length to original length. For mild steel the curve rises linearly to the proportional limit, where Hooke’s law holds and the slope is Young’s modulus, then passes the elastic limit, the upper and lower yield points, a strain-hardening region up to the ultimate tensile strength, and finally necking to fracture. Engineering stress uses the original area, so the curve appears to fall after the ultimate point, whereas true stress uses the instantaneous area and keeps rising. Materials without a distinct yield point, such as aluminium, are specified by 0.2 percent proof stress instead.
Q: How does a three-phase induction motor start, and why does it need a starter? (Electrical)
Three-phase supply through the stator windings produces a rotating magnetic field at synchronous speed Ns = 120f/P. That field cuts the rotor conductors, inducing an EMF and current, and the resulting force drags the rotor along - always a little slower than the field, which is slip, because at synchronous speed there would be no relative motion and therefore no induced current. At standstill slip is 1 and the rotor behaves like a short-circuited secondary, drawing five to seven times full-load current. Star-delta, autotransformer, and soft starters reduce the applied voltage during starting to limit that inrush; star-delta cuts both starting current and starting torque to about one-third.
Q: What is power factor, and why does improving it matter on site? (Electrical)
Power factor is the cosine of the phase angle between voltage and current, equal to real power in kW divided by apparent power in kVA. Inductive loads such as motors and welding sets draw lagging reactive current that does no useful work yet still heats cables and loads transformers. A poor power factor therefore means higher current for the same output - larger cable sizes, higher copper losses, greater voltage drop, and penal tariffs from the utility. Correction means connecting capacitor banks close to the load to supply the reactive component locally, ideally with automatic power factor correction relays that switch stages as the load varies. It is a direct, quantifiable cost saving, which is exactly the cost-consciousness L&T’s final round probes for.
Q: What is a factor of safety and how do you choose one?
Factor of safety is the ratio of a material’s failure strength to the working or allowable stress used in design. It absorbs uncertainty in load estimation, material variability, manufacturing tolerance, corrosion, and the consequence of failure. Ductile materials are normally designed against yield strength with a factor of about 1.5 to 2, brittle materials against ultimate strength with 3 to 4 or more, and lifting equipment or anything where failure endangers people carries substantially higher factors. A stronger answer notes that modern codes such as IS 456 use partial safety factors instead - separate factors applied to loads and to material strength in limit state design - rather than a single global number.
Q: How would you handle a safety-versus-deadline conflict on a project site?
Treat safety as non-negotiable rather than as one variable to trade off. Stop the unsafe activity first, because an incident costs far more schedule than the delay you were trying to avoid, then escalate to the site engineer or EHS officer with the specific hazard named. Next, look for a compliant way to protect the schedule - resequencing independent activities, adding a shift, pre-fabricating something off the critical path - rather than accepting the delay passively. Back it with a concrete example where you insisted on a permit-to-work, a toolbox talk, or proper fall protection, and mention the cost angle too: rework and incident downtime are among the largest avoidable costs on any construction site.
Frequently asked questions about L&T interviews
Section titled “Frequently asked questions about L&T interviews”What is the Larsen & Toubro interview process for freshers?
L&T’s Graduate Engineer Trainee (GET) process for core engineering roles typically runs 4 stages: 1. Online Assessment (~120 minutes, 130 questions) - 40 domain-specific questions (numerical and theoretical, branch-wise) plus 30 verbal, 30 logical reasoning, and 30 quantitative aptitude questions, no negative marking. 2. Technical Interview - branch-specific fundamentals (mechanical, electrical, or civil) plus general aptitude. 3. A final interview, sometimes with the business unit’s IC (in-charge) head, assessing learning attitude, innovation, safety awareness, and cost-consciousness. 4. HR Interview (~30 minutes) - background, motivation, and willingness to work at a project site. A medical exam follows for selected candidates.
Is this L&T page about core engineering or L&T Technology Services (LTTS)?
This page covers core Larsen & Toubro engineering/construction GET hiring - civil, mechanical, and electrical roles across L&T’s construction, heavy engineering, and infrastructure businesses. L&T Technology Services (LTTS) is a separate, publicly listed engineering-R&D-services company with its own hiring process, covered separately on this site.
What questions are asked in L&T interviews?
The online assessment’s domain section tests branch fundamentals at a numerical-and-theoretical level (structural analysis and concrete technology for civil, thermodynamics and machine design for mechanical, circuits and machines for electrical). Technical interviews go deeper into the same fundamentals plus your final-year project. The closing interview with the IC head is distinctive - it explicitly probes learning attitude, innovation, safety awareness, and cost-consciousness rather than pure technical recall, reflecting L&T’s project-execution culture.
How many rounds are there in the L&T interview?
Most GET candidates go through 4 stages: an Online Assessment, a Technical Interview, a final interview (sometimes with the business unit’s IC head), and an HR Interview, followed by a medical exam for selected candidates. Some drives compress the technical and final interview into a single panel round.
How should I prepare for L&T interviews?
Revise your branch’s core subjects hard, since 40 of the 130 online-assessment questions are domain-specific, and the technical interview goes deeper into the same areas. Keep verbal, logical, and quantitative aptitude sharp too - they make up 90 of the 130 questions. For the final/IC-head interview, prepare to speak concretely about safety-first thinking and cost-consciousness on any project or internship you’ve done, since L&T’s process explicitly evaluates for these traits. For HR, be ready to discuss relocation to a project site.
Is L&T’s eligibility criteria strict?
Yes - L&T shortlisting for GET roles typically requires 65%+ marks (or equivalent CGPA) with no active or past backlogs. Confirm the exact cutoff and any branch-specific requirements in your college placement notification, since these can vary slightly by year and business unit.