Mechanical interview questions
500 questions with model answers, in four levels. Start with Basic, check yourself honestly, then move up.
Basic questions
- Engineering Mechanics (12)
- Strength of Materials (14)
- Thermodynamics (14)
- Fluid Mechanics (13)
- Heat Transfer (12)
- Theory of Machines & Vibrations (13)
- Machine Design (12)
- Manufacturing Processes (14)
- IC Engines (12)
- Refrigeration & Air Conditioning (11)
- Engineering Materials (12)
- Metrology, CAD/CAM & GD&T (11)
Intermediate questions
- Engineering Mechanics (12)
- Strength of Materials (14)
- Thermodynamics (14)
- Fluid Mechanics (13)
- Heat Transfer (12)
- Theory of Machines & Vibrations (13)
- Machine Design (12)
- Manufacturing Processes (14)
- IC Engines (12)
- Refrigeration & Air Conditioning (11)
- Engineering Materials (12)
- Metrology, CAD/CAM & GD&T (11)
Advanced questions
- Engineering Mechanics (10)
- Strength of Materials (11)
- Thermodynamics (11)
- Fluid Mechanics (11)
- Heat Transfer (11)
- Theory of Machines & Vibrations (11)
- Machine Design (11)
- Manufacturing Processes (10)
- IC Engines (10)
- Refrigeration & Air Conditioning (10)
- Engineering Materials (10)
- Metrology, CAD/CAM & GD&T (9)
Tricky questions
- Engineering Mechanics (6)
- Strength of Materials (7)
- Thermodynamics (7)
- Fluid Mechanics (7)
- Heat Transfer (7)
- Theory of Machines & Vibrations (6)
- Machine Design (6)
- Manufacturing Processes (6)
- IC Engines (6)
- Refrigeration & Air Conditioning (6)
- Engineering Materials (6)
- Metrology, CAD/CAM & GD&T (5)
Sample questions
- What is a force and what is its SI unit?
- What is resilience and modulus of resilience?
- What are surface tension and capillarity?
- What are the types of gear trains?
- What is the difference between up milling and down milling?
- What are typical human comfort conditions?
- A 10 kg block rests on a surface with μs = 0.4. What horizontal force starts it moving?
- How do series and parallel springs combine?
- What is cavitation?
- What are underdamped, critically damped and overdamped systems?
- What is powder metallurgy?
- What is ODP and GWP of a refrigerant?
- A uniform ladder rests against a smooth wall with floor friction μ = 0.3. What is the minimum angle to the floor before it slips?
- 1 kJ of heat flows from a 500 K reservoir to a 300 K reservoir. Find entropy generated and exergy destroyed (T₀ = 300 K).
- How do fouling factors affect heat exchanger design?
- A shaft keeps failing in fatigue at its keyway. What would you change?
- How do you choose between air-cooled and water-cooled chillers?
- Does a heavier object fall faster than a lighter one?
- Does water drain clockwise in one hemisphere and anticlockwise in the other?
- Is climb (down) milling always better than conventional milling?