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Mechanical Engineering · 1,149 questions

Mechanical Engineering Interview Questions for freshers and experienced engineers

Mechanical is the largest non-IT engineering branch in India. Campus and off-campus interviews at core companies open with your final-year project and then test fundamentals - strength of materials, thermodynamics, fluid mechanics, manufacturing and machine design - while PSU interviews after GATE go deeper on the same subjects. Experienced hires are tested on design tools, codes and shop-floor practice.

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B.Tech enrolment 2024-25
2.37 lakh
GATE ME 2025 registrations
79,830
Placement rate
66%

Three sections, one ladder

Core covers the campus and GATE/PSU technical round. Design covers the tools, codes and standards experienced hires are tested on. Industry covers plant, site and production practice.

Mechanical Core

SOM, thermo, fluids, HT, manufacturing, design

Engineering mechanics, strength of materials, theory of machines, thermodynamics, fluid mechanics, heat transfer, manufacturing, machine design, materials, IC engines, RAC and industrial engineering — the campus technical round and GATE/PSU interview spine.

Mechanical Design

CAD, GD&T, FEA, machine elements, codes

CAD modelling (SolidWorks, CATIA, Creo, NX), GD&T per ASME Y14.5, FEA/CAE, machine elements, fits & tolerances, heat treatment, DFM/DFA, ASME/IS/API codes, DFMEA & validation, PLM, pressure vessels and automotive design — the design-engineer and experienced-hire layer.

Production & Plant

Lean, Six Sigma, quality systems, maintenance, safety

Production planning, lean/TPS, Six Sigma & SPC, ISO 9001/IATF 16949/PPAP, TPM/RCM maintenance, welding & NDT, CNC practice, automotive plants, HVAC & utilities, industrial safety, supply chain and project execution — what production, quality and maintenance interviews ask.

Who hires mechanical engineers

  • L&T (Heavy Engineering, Construction, LTTS)
  • Tata Motors, Maruti Suzuki, Mahindra, Ashok Leyland, Bajaj, TVS, Hero
  • Bosch, ZF, Cummins, Caterpillar, JCB
  • Godrej, Thermax, Kirloskar, Tata Steel, JSW
  • Reliance GET, engineering services (Tata Technologies, Cyient)

Government route

  • GATE ME -> BHEL, NTPC, IOCL, ONGC, GAIL, SAIL, PGCIL, NHAI
  • UPSC ESE (ME 89 posts in 2026)
  • ISRO Scientist/Engineer SC (160 Mechanical posts in 2025)
  • SSC JE, RRB JE, state PSC AE/JE
GATE ME pattern setESE ME pattern setSSC JE ME pattern setAll government jobs →

How the interview runs

  1. 1Online test: aptitude + mechanical MCQs (thermo, fluids, manufacturing)
  2. 2Technical panel (30-60 min): final-year project first, then fundamentals and CAD/CAE tools
  3. 3HR: relocation, plant shifts, site readiness; medical at L&T
  4. 4Eligibility typically 60-65% with no active backlogs

What experienced engineers get asked

  • GD&T per ASME Y14.5, tolerance stack-ups, DFM/DFA, DFMEA and DVP&R
  • SolidWorks, CATIA, Creo, NX; ANSYS, HyperMesh, Abaqus; Teamcenter/Windchill
  • ASME BPVC VIII, ASME B31.3, API 610/650, TEMA, IS 2062, IATF 16949, PPAP/APQP
  • Production: lean/TPM, OEE, SPC, Six Sigma, 8D; maintenance: RCM, vibration analysis

Your level, your role

Pick where you are and what you are targeting; placd builds the prep journey and the mock-interview rounds from it.

Levels

  • Fresher · Core / PSU
    BHEL / NTPC / ISRO / DRDO — GATE-style core + technical interview
  • Fresher · Private / Campus
    L&T / Tata Motors / Maruti / Bosch — aptitude + core technical + HR
  • Engineer (2–5 yrs)
    2–5 yrs — design tools, standards and shop-floor practice decide
  • Senior (5–10 yrs)
    5–10 yrs — design ownership, failure analysis, cost & quality
  • Lead / Manager
    Lead / Manager — plant, people, projects; fundamentals still screened

Roles

  • Design Engineer
    CAD / CAE, GD&T, machine elements, DFMEA
  • Production / Manufacturing
    Shop floor, lean, CNC, PPC, OEE
  • Maintenance / Plant
    TPM, RCM, utilities, breakdown analysis
  • Quality (QA / QC)
    IATF, PPAP, SPC, MSA, 8D, metrology
  • Core PSU / GATE
    BHEL, NTPC, ISRO, DRDO, SAIL, IOCL

Interview questions by topic

Browse any topic free. Answers and explanations are one free account away; the free readiness check gives you a scored taste of the mock interview.

Frequently asked

What is asked in a mechanical engineering fresher interview?

Your final-year project in depth, then fundamentals: stress-strain and Mohr's circle, thermodynamic cycles, Bernoulli and pump NPSH, casting/welding/machining, gears and bearings, Fe-C diagram and heat treatment, and the CAD/CAE tools you used.

How do L&T, Tata Motors and Maruti select mechanical freshers?

An online test (aptitude plus domain MCQs), one or two technical panel rounds that start from your project, then HR and medical. Maruti adds a presentation round; L&T runs a medical with colour-blindness check.

What do PSUs ask mechanical engineers after GATE?

IOCL weights GATE 85% and GD/GT plus interview 15%; BHEL runs a three-member panel on fundamentals and power-plant questions. Expect thermodynamics, heat transfer, manufacturing and your project, plus why-this-PSU questions.

What do experienced mechanical engineers get asked?

Design roles: GD&T, stack-ups, FEA validation, DFMEA, standards such as ASME and IS. Production roles: lean, TPM, OEE, PPAP, SPC, root-cause analysis. Maintenance roles: RCM, vibration, failure investigations.

Guide

Mechanical Engineering Interview Questions 2026: Freshers to Design Engineers

How L&T, Tata Motors, Maruti, Bosch and PSU panels interview mechanical engineers, 28 real questions with answers, and a 4-week plan.

Read the guide

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