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100+ MECHANICAL engineering INTERVIEW questions

Name: 100+ MECHANICAL engineering INTERVIEW questions
Rating: 4.0 (73 reviews)

More than 100 interesting question and answers from various MECHANICAL engineering subjects - Get INTERVIEW ready !!

Created byJ Aatish Rao

Last updated 3/2022

English

What you'll learn

Interview/Viva/Important questions with proper explanatory answers from major mechanical engineering subjects.
Basic Mechanical Engineering (BME) - Explain the term torque,Explain different types of fits etc. (10+ questions)
Manufacturing & Material Science - Define pitting,Why is heat treatment of steel metal crucial etc. (20+ Questions)
Strength Of Material (SOM) - Define Buckling Factor,What is Stress Concentration etc. (10+ Questions)
Theory Of Machine (TOM) - What is gear ratio,What do you mean by cotter joint etc. (10+ Questions)
Automobile Engineering - What are the various types of brakes,What causes white smoke in two stroke locomotive engines etc. (10+ Questions)
Fluid Mechanics (FM) - What is a Newtonian fluid,Explain The Difference Between Rotational And Irrotational Flow etc. (15+ Questions)
Thermodynamics - What is the second law of thermodynamics,What is the difference between the heat engine & heat pump etc. (5+ Questions)
RAC & HMT - Explain mechanical refrigeration,What is heat transfer co-efficient etc. (15+ Questions)
Miscellaneous - What is the advantage of using pneumatic, Define least count etc. (10+ Questions)

Course content

10 sections • 53 lectures • 2h 21m total length

Scope of the course3:12

Introduction to Basic Mechanical Engineering1:50
Mechanical engineering is an engineering branch that combines engineering physics and mathematics principles with materials science to design, analyse, manufacture, and maintain mechanical systems. It is one of the oldest and broadest of the engineering branches.
The mechanical engineering field requires an understanding of core areas including mechanics, dynamics, thermodynamics, materials science, structural analysis, and electricity.
Today mechanical engineers are pursuing developments in such areas as composites, mechatronics, and nanotechnology. It also overlaps with aerospace engineering, metallurgical engineering, civil engineering, electrical engineering, manufacturing engineering, chemical engineering, industrial engineering, and other engineering disciplines to varying amounts.
In this section, we will deal with certain important questions pertaining to basic mechanical engineering as such
What is torque?
What is latent heat?
What is limiting friction ?
What are manometers ? etc.
Explain the term torque.3:04
Level - EASY
Q.1. Explain the term torque.
Q.2. Define the term latent heat.
Q.3. What Do You Understand by Dimensional Analysis?
State Archimedes Principle.2:29
Level - EASY
Q.4. State Archimedes Principle.
Q.5. What is limiting friction?
Q.6. What are manometers?
What is the importance of tolerance in engineering?4:11
Level - MEDIUM
Q.7. What is the importance of tolerance in engineering?
Q.8. What is universal coupling?
Q.9. What does angular momentum mean?
Q.10. What is spring constant?
Explain different types of fits.2:55
Level - HARD
Q.11. Explain different types of fits.
Q.12. Why gas containers are mostly cylindrical in shape?
Revision BME

Introduction to Manufacturing & Material Science1:15
Manufacturing technology is a term that can refer to a number of modern methods of science, production, and engineering that assist in industrial production and various manufacturing processes.
Materials science is an interdisciplinary field involving the properties of matter and its applications to various areas of science and engineering.
In this section, we will deal with certain important questions pertaining to Manufacturing & material science as such
What is pitting?
What is caustic embrittlement?
Why is cast iron seasoning important before machining?
What is the role of nitrogen in welding? Etc.
Define pitting.2:49
Level - EASY
Q.13. Define pitting.
Q.14. What is caustic embrittlement?
Q.15. What Parameters Influence the Tool Life?
Distinguish Between A Jig And Fixture.2:31
Level - EASY
Q.16. Distinguish Between A Jig And Fixture.
Q.17. What is the main classification of coals?
Explain knurling.2:59
Level - MEDIUM
Q.18. Explain knurling.
Q.19. Why is cast iron seasoning important before machining?
Q.20. Define case hardening.
Why is heat treatment of steel metal crucial?2:37
Level - MEDIUM
Q.21. Why is heat treatment of steel metal crucial?
Q.22. What is the role of nitrogen in welding?
Q.23. How does iron ore turn into steel?
What is extruded aluminium?2:06
Level - MEDIUM
Q.24. What is extruded aluminium?
Q.25. How the rank of the coal is obtained?
What do you mean by annealing?3:31
Level - HARD
Q.26. What do you mean by annealing?
Q.27. Explain important rules that must be kept in mind while designing castings?
Q.28. How can you identify mild steel, cast iron, and high carbon steel?
Q.29. How to report calorific values of fuel?
How is martensite structure formed in steel?3:43
Level - HARD
Q.30. How is martensite structure formed in steel?
Q.31. How Oxygen Can Be Removed From Steel during Melting? What Are Fully Killed Steels?
Q.32. Describe lathe chucks.
Revision MMS

Introduction to Strength Of Material1:16
Strength of materials, also know as mechanics of materials, is focused on analyzing stresses and deflections in materials under load. Knowledge of stresses and deflections allows for the safe design of structures that are capable of supporting their intended loads.
In this section, we will deal with certain important questions pertaining to Strength of materials or mechanics of materials as such
What is a udl
What is Bulk Modulus Of Elasticity
Distinguish Between Creep And Fatigue?
Define Buckling Factor?
What is slenderness ratio? And many more
Define a uniformly distributed load.3:38
Level - EASY
Q.33. Define a uniformly distributed load.
Q.34. What is Bulk Modulus Of Elasticity?
Q.35. Distinguish Between Creep And Fatigue?
Define Buckling Factor.2:09
Level - EASY
Q.36. Define Buckling Factor?
Q.37. What is Lateral strain?
Is it the stress that produces strain or vice-versa?3:45
Level - MEDIUM
Q.38. Is it the stress that produces strain or vice-versa?
Q.39. What Is The Difference Between Proof Resilience And Modulus Of Resilience?
Q.40. What is Hoop Stress and longitudinal stress in a thin walled cylinder?
What is the value of modulus of elasticity of steel?2:37
Level - HARD
Q.41. What is the value of modulus of elasticity of steel?
Q.42. What is slenderness ratio?
Q.43. What is Bending Moment?
What is Stress Concentration?3:08
Level - HARD
Q.44. What is Stress Concentration?
Q.45. What are the differences between beams and columns?
Q.46. What is section modulus?
Revision SOM

Introduction to Theory Of Machine1:09
The subject Theory of Machines may be defined as that branch of Engineering-science, which deals with the study of relative motion between the various parts of a machine, and forces which act on them. The knowledge of this subject is very essential for an engineer in designing the various parts of a machine.
In this section, we will deal with certain important questions pertaining to Theory of Machines as such
What is gear ratio?
What is universal coupling?
What are the advantages of Gear drive?
What is Herringbone Gear?
What are the different types of springs. And many more
What is gear ratio?0:50
Level - EASY
Q.47. What is gear ratio?
What do you mean by cotter joint.3:56
Level - MEDIUM
Q.48. What do you mean by cotter joint?
Q.49. What is the difference between projectile motion and a rocket motion?
Q.50. What is universal coupling?
What are the advantages of Gear drive?4:02
Level - MEDIUM
Q.51. What are the advantages of Gear drive?
Q.52. What is Engine Governor?
Q.53. What is Gear Module?
Q.54. What is Herringbone Gear?
What are the benefits of cycloidal gears?3:11
Level - HARD
Q.55. What are the benefits of cycloidal gears?
Q.56. Differentiate Between Gear Hobbing And Gear Shaping.
Q.57. What are the different types of springs.
Revision TOM

Introduction to automobile engineering1:10
Automobile Engineering is the branch of engineering which deals with designing, manufacturing, mechanical mechanisms as well operations of automobiles.
In this section, we will deal with certain important questions pertaining to Automobile Engineering as such
What is the importance of thermostat in the cooling system of an engine?
What is the main difference between petrol engine and diesel engine?
Differentiate between scavenging and supercharging.
Why more lubricating oil is needed in two-stroke engines than four stroke engines?
What causes white smoke in two stroke locomotive engines?
What are the various types of brakes?3:26
Level - EASY
Q.58. What are the various types of brakes?
Q.59. What is the importance of thermostat in the cooling system of an engine?
Q.60. What is the main difference between petrol engine and diesel engine?
Q.61. What is water jacket?
Differentiate between scavenging and supercharging.3:18
Level - MEDIUM
Q.62. Differentiate between scavenging and supercharging.
Q.63. Why more lubricating oil is needed in two-stroke engines than four stroke engines?
Q.64. What is the function of flywheel?
In IC engine which part is known as column?2:56
Level - MEDIUM
Q.65. In IC engine which part is known as column?
Q.66. Which one has greater efficiency for the same compression ratio? Diesel engine or petrol engine?
What causes white smoke in two stroke locomotive engines?2:38
Level - HARD
Q.67. What causes white smoke in two stroke locomotive engines?
Q.68. How Does A Super Charger Work In A Car?
Q.69. What Is The Difference Between Hydraulic Oil And Engine Oil?
What is the difference between turbocharger and supercharger?1:58
Level - HARD
Q.70. What is the difference between turbocharger and supercharger?
Q.71. Define Crossflow Scavenging.
Revision Automobile

Introduction to Fluid Mechanics1:11
Fluid mechanics is the branch of physics concerned with the mechanics of fluids (liquids, gases, and plasmas) and the forces on them. ... It can be divided into fluid statics, the study of fluids at rest; and fluid dynamics, the study of the effect of forces on fluid motion.
In this section, we will deal with certain important questions pertaining to Fluid mechanics as such
What Is Boundary Layer?
What Is The Difference Between Path Line And Stream Line ?
What is a Newtonian fluid
What are the differences between elbows and bend?
What is the function of butterfly valve? And many more
Explain The Difference Between Rotational And Irrotational Flow?2:58
Level - EASY
Q.72. Explain The Difference Between Rotational And Ir-rotational Flow?
Q.73. What Is Boundary Layer?
Q.74. What Is The Difference Between Path Line And Stream Line?
Navier Stokes Equation Represents The Conservation Of Which Quantity?2:35
Level - EASY
Q.75. Navier Stokes Equation Represents The Conservation Of Which Quantity?
Q.76. What is viscosity? What is Newton’s law of viscosity?
Q.77. What is meant by no-slip condition in fluids?
What are major and minor head losses in a fluid flow system?2:44
Level - EASY
Q.78. What are major and minor head losses in a fluid flow system?
Q.79. Name some of the flow meters.
Q.80. What is Reynolds Number?
What is a Newtonian fluid?4:50
Level - MEDIUM
Q.81. What is a Newtonian fluid?
Q.82. How does Cavitation cause damage?
Q.83. Explain The Difference Between Friction Drag And Pressure Drag?
Q.84. How Much Hydrostatic Pressure Acts On A Curved Surface?
What are the differences between elbows and bend? Which has greater head losses?5:12
Level - MEDIUM
Q.85. What are the differences between elbows and bend? Which has greater head losses?
Q.86. What is the function of orifice meter?
Q.87. What is a nozzle?
Q.88. What is priming of centrifugal pump?
What is the ratio of the thickness of TBL to the thickness of HBL?3:25
Level - HARD
Q.89. What is the ratio of the thickness of thermal boundary layer to the thickness of hydrodynamic boundary layer?
Q.90. What Happens If Centrifugal Pump Is Operated At Excessive Speeds?
Q.91. What is the function of butterfly valve?
Revision FM

Introduction to Thermodynamics1:07
Thermodynamics is the study of the relations between heat, work, temperature, and energy. The laws of thermodynamics describe how the energy in a system changes and whether the system can perform useful work on its surroundings.
In this section, we will deal with certain important questions pertaining to Thermodynamics as such
What is the second law of thermodynamics?
Explain enthalpy.
What is the difference between the heat engine & heat pump?
Why is Reversed Carnot Cycle not possible practically?
Explain the Otto cycle in brief. And many more
What is the second law of thermodynamics?3:33
Level - EASY
Q.92. What is the second law of thermodynamics?
Q.93. Name two vital conditions of a perfect gas.
Q.94. Explain enthalpy.
Q.95. What Is The Difference Between Heat Capacity And Specific Heat Of A Material ?
What is the difference between the heat engine & heat pump?4:41
Level - EASY
Q.96. What is the difference between the heat engine & heat pump?
Q.97. Why is Reversed Carnot Cycle not possible practically?
Q.98. Give the names of different Thermodynamic Processes.
Q.99. Explain the Otto cycle in brief.
Revision Thermodynamics

Introduction to RAC & HMT1:25
Refrigeration is the science of moving heat from low temperature to high temperature. In addition to chilling and freezing applications, refrigeration technology is applied in air conditioning and heat pumps. ... If a change of enthalpy can be sensed as a change of temperature, it is called sensible heat.
Heat transfer is classified into various mechanisms, such as thermal conduction, thermal convection, thermal radiation, and transfer of energy by phase changes. Engineers also consider the transfer of mass of differing chemical species, either cold or hot, to achieve heat transfer.
In this section, we will deal with certain important questions pertaining to RAC & HMT as such
What is Refrigeration? What is the unit of refrigeration?
What is the LMTD method?
What is advantage of vapor compression refrigeration system ?
What do you mean by emissive power?
Explain mechanical refrigeration. And many more
What is Refrigeration? What is the unit of refrigeration?2:41
Level - EASY
Q.100. What is Refrigeration? What is the unit of refrigeration?
Q.101. Detect absorbers and refrigerant in these systems – Li-Br and NH3 – H2O.
Q.102. What is the LMTD method?
Which Cycle is used in Air Refrigeration System?1:49
Level - EASY
Q.103. Which Cycle is used in Air Refrigeration System?
Q.104. What is advantage of vapor compression refrigeration system?
Q.105. Define thermal conductivity.
Q.106. What is boundary layer thickness?
What do you mean by emissive power?1:47
Level - MEDIUM
Q.107. What do you mean by emissive power?
Q.108. Will A Steel Cable Become Longer If It Is Heated While Under Load?
Q.109. Under What Condition The Thermal Boundary Layer Thickness Will Be Equal To The Hydrodynamic Boundary Layer Thickness?
What is Under-cooling or Sub-cooling of refrigeration system?3:12
Level - MEDIUM
Q.110. What is Under-cooling or Sub-cooling of refrigeration system?
Q.111. Which has higher COP? Vapor compression or Vapor absorption?
Explain mechanical refrigeration.2:22
Level - HARD
Q.112. Explain mechanical refrigeration.
Q.113. Which conducts heat faster steel copper or brass?
Q.114. Why Over-pressurizing Air Conditioning System Considered Bad?
What is heat transfer co-efficient?1:25
Level - HARD
Q.115. What is heat transfer co-efficient?
Q.116. Describe vapor compression refrigeration cycle.
Revision RAC & HMT

What is the advantage of using pneumatic?2:48
Level - EASY
Q.117. What is the advantage of using pneumatic?
Q.118. What are turbo machines?
Q.119. What do you understand by engineering drawing?
Define least count. How to calculate for vernier calipers?2:04
Level - EASY
Q.120. Define least count. How to calculate for vernier calipers?
Q.121. What is an orthographic drawing?
Why do you need a biological shield in nuclear plants?2:33
Level - MEDIUM
Q.122. Why do you need a biological shield in nuclear plants?
Q.123. What is a positive displacement pump?
Q.124. What Keeps The Shaft In Floating Condition In Hydrodynamic Journal Bearing?
What Is The Value Of Coefficient Of Friction For Ball Bearing?1:56
Level - MEDIUM
Q.125. What Is The Value Of Coefficient Of Friction For Ball Bearing?
Q.126. What does CNC Means?
Do not forget to download your FREE e-book.Check the resources associated with this next lecture.
BONUS Lecture0:28
So this here is the last lecture of the course. I hope you understood everything. Download the FREE e-book available in resources.
All the very BEST !!

Requirements

Basic Physics - Density,Viscosity,Law of conservation of energy,Moment,Buoyancy,Moment Of Inertia etc.
Basic Mathematics - Differentiation,Integration,Partial differentiation,Logarithm etc.
Basic Mechanical Engineering - Welding,Crystal structure,Metal casting,Fe-C phase diagram,Stress & strain,P-V diagram etc.

Description

Mechanical engineering final-year students, graduates, and even seasoned professionals often struggle to find the right guide for acing interviews or viva sessions. I’ve been in your shoes, and through my 8+ years of industrial experience and numerous interviews, I’ve learned what works and what doesn’t.

This course is my effort to make the process easier for you. I’ve compiled 100+ mechanical engineering interview and viva questions that will not only help you succeed in interviews but also strengthen your academic foundation.

Who Is This Course For?

Final-year and pre-final-year mechanical engineering students.
Recent graduates looking to kickstart their careers.
Working professionals aiming to refresh their knowledge and interview skills.

What’s Inside the Course?

More than a hundred questions are discussed from major subjects in mechanical engineering, including:

Basic Mechanical Engineering (BME)
Manufacturing Science
Material Science
Strength of Material (SOM)
Theory of Machine (TOM)
Automobile Engineering
Fluid Mechanics (FM)
Thermodynamics
Refrigeration & Air Conditioning (RAC)
Heat & Mass Transfer (HMT) and many more!

Unique Learning Approach

For each question, you’ll get two types of answers:

Explanatory Answer: Written in simple language with a practical approach for better understanding.
Interview Answer: Slightly theoretical and concise—perfect for viva and interview scenarios.

Levels of Complexity

The questions are categorized into three levels:

EASY
MEDIUM
HARD

While you might find a hard question easy or vice versa, one thing is guaranteed: You’ll gain knowledge!

Why This Course?

This course is more than just a list of questions—it’s a comprehensive guide to mastering the most important topics in mechanical engineering, boosting your confidence for interviews, viva sessions, and academic excellence.

Enroll now and take a significant step toward a successful career in mechanical engineering!

Who this course is for:

Pre-Final Year mechanical engineering students
Final year mechanical engineering students
Mechanical engineering graduates and professionals
Anyone from mechanical stream who wants to sharpen their interview skills
Students preparing for their practicals (Viva) in the mechanical engineering stream.

100+ MECHANICAL engineering INTERVIEW questions

What you'll learn

Explore related topics

Course content

Introduction1 lecture • 3min

Basic Mechanical Engineering (BME)5 lectures • 14min

Manufacturing & Material Science8 lectures • 22min

Strength Of Material (SOM)6 lectures • 17min

Theory Of Machine (TOM)5 lectures • 13min

Automobile Engineering6 lectures • 15min

Fluid Mechanics (FM)7 lectures • 23min

Thermdynamics3 lectures • 9min

RAC & HMT7 lectures • 15min

Miscellaneous5 lectures • 10min

Requirements

Description

Who this course is for: