1
Arulmigu Meenakshi Amman college of Engineering
Vadamavandal-604410.
Prepared by,
V.Umapathy,
Prof./Mech.
Imortant Questions and Answers
ME25C03-Introduction to Mechanical Engineering
Syllabus
1. Engineering: History and evolution of mechanical engineering, Basic mechanical
engineering principles (force, motion, energy, work, power), Units and dimensions, SI
system, Ethics and professionalism in engineering.
Activities: Interactive quiz, Conversion between SI and other unit systems.
2. Mechanics of Materials and Structures: Stress and strain, types of stresses (tensile,
compressive, shear), Elasticity and plasticity, Mechanical properties of materials (strength,
toughness, hardness), Introduction to bending, torsion, and axial loading, Simple structural
analysis and design concepts.
Activities: Demonstration of Simple truss or beam problems solved using software.
3. Energy Interactions: System, Energy Transfer, Conduction, convection, and radiation,
Working principle of Heat Engines, Refrigeration and HVAC systems.
Activities: Demonstration of working model of internal combustion engine & refrigerator,
Virtual demonstration of Thermodynamic cycles.
4. Machine Elements: Gears, bearings, shafts, fasteners, couplings, Selection of machine
components, Quality control and safety in mechanical engineering.
Activities: Demonstration of working of Gears, bearings, etc. in a mechanical system.
5. Manufacturing Processes: Casting, forming, machining & joining processes, CNC and
additive manufacturing, overview of smart manufacturing.
Activities: Demonstration of various machining processes, 3D printing of simple parts.
S.No. Description
Unit-I
, 2
Engineering
Prepared by,
V.Umapathy,Prof./Mech.
Basic Concepts
1. History & Evolution- Ancient Roots:
- Archimedes (287-212 BC): Levers, pulleys, screws.
- Vedic India: Chariots, irrigation tools.
- Industrial Revolution (18th-19th century):
- James Watt: Steam engine (1769).
- Mechanization → mass production.
- Modern Era:
- 20th century: Autos (Ford), aerospace (Wright brothers).
- Today: Robotics, AI, 3D printing, green tech.
- India:
- Ancient: Vishwakarma (temple engineering).
- Modern: IITs, automotive hubs (Pune, Chennai).
2. Basic Mechanical Principles- Force (F):
- Push/pull → change motion.
- Newton’s 2nd Law: F = ma.
- Units: Newton (N) = kg·m/s².
- Motion:
- Linear: v = u + at.
- Rotary: ω = θ/t, α = dω/dt.
- Energy (E):
- KE: 1/2mv², PE: mgh.
- Conservation: Eᵢₙ = Eₒᵤₜ.
- Work (W) & Power (P):
- W = F·d·cosθ (Joules).
- P = W/t (Watts).
- Examples:
- Lift 10 kg → 1 m → W = mgh = 98 J.
- Car engine: 100 HP = 74.6 kW.
3. Units & Dimensions- SI Units:
, 3
- Dimensions:
- F: [MLT⁻²].
- E: [ML²T⁻²].
- Tips:
- Always check units.
- Convert → SI.
4. Ethics & Professionalism
- Ethics:
- Safety, honesty, public welfare.
- Example: Design safe brakes for trains.
- Professionalism:
- Respect, teamwork, lifelong learning.
- Codes → ASME, IEEE, IEI (India).
- India:
- IEI Code: Integrity, competence.
- Responsibility → society, environment.
Multiple Choice QA
Q1. Which invention is considered a major milestone that accelerated the Industrial Revolution and
the development of mechanical engineering?
A) Telephone
B) Steam Engine
C) Radio
D) Computer
Answer: B) Steam Engine
Explanation: The steam engine, significantly improved by James Watt, revolutionized manufacturing,
transportation, and industrial processes.
, 4
Q2. Work is said to be done when:
A) A force acts on a body without displacement
B) A body moves without force
C) A force causes displacement in its direction
D) Energy is stored in a body
Answer: C) A force causes displacement in its direction
Explanation: Work = Force × Displacement × cos θ.
Q3. Power is defined as:
A) Force × Velocity
B) Work done per unit time
C) Energy stored per unit mass
D) Force × Distance
Answer: B) Work done per unit time
Explanation: Power = Work / Time. The SI unit of power is the Watt (W).
Q4. What is the SI unit of force?
A) Joule
B) Pascal
C) Newton
D) Watt
Answer: C) Newton
Explanation: One Newton (N) is the force required to accelerate a mass of 1 kg at 1 m/s².
Q5. According to engineering ethics, the primary responsibility of an engineer is to:
A) Maximize company profits
B) Satisfy client demands at any cost
C) Protect public safety, health, and welfare
D) Complete projects as quickly as possible
Answer: C) Protect public safety, health, and welfare
Arulmigu Meenakshi Amman college of Engineering
Vadamavandal-604410.
Prepared by,
V.Umapathy,
Prof./Mech.
Imortant Questions and Answers
ME25C03-Introduction to Mechanical Engineering
Syllabus
1. Engineering: History and evolution of mechanical engineering, Basic mechanical
engineering principles (force, motion, energy, work, power), Units and dimensions, SI
system, Ethics and professionalism in engineering.
Activities: Interactive quiz, Conversion between SI and other unit systems.
2. Mechanics of Materials and Structures: Stress and strain, types of stresses (tensile,
compressive, shear), Elasticity and plasticity, Mechanical properties of materials (strength,
toughness, hardness), Introduction to bending, torsion, and axial loading, Simple structural
analysis and design concepts.
Activities: Demonstration of Simple truss or beam problems solved using software.
3. Energy Interactions: System, Energy Transfer, Conduction, convection, and radiation,
Working principle of Heat Engines, Refrigeration and HVAC systems.
Activities: Demonstration of working model of internal combustion engine & refrigerator,
Virtual demonstration of Thermodynamic cycles.
4. Machine Elements: Gears, bearings, shafts, fasteners, couplings, Selection of machine
components, Quality control and safety in mechanical engineering.
Activities: Demonstration of working of Gears, bearings, etc. in a mechanical system.
5. Manufacturing Processes: Casting, forming, machining & joining processes, CNC and
additive manufacturing, overview of smart manufacturing.
Activities: Demonstration of various machining processes, 3D printing of simple parts.
S.No. Description
Unit-I
, 2
Engineering
Prepared by,
V.Umapathy,Prof./Mech.
Basic Concepts
1. History & Evolution- Ancient Roots:
- Archimedes (287-212 BC): Levers, pulleys, screws.
- Vedic India: Chariots, irrigation tools.
- Industrial Revolution (18th-19th century):
- James Watt: Steam engine (1769).
- Mechanization → mass production.
- Modern Era:
- 20th century: Autos (Ford), aerospace (Wright brothers).
- Today: Robotics, AI, 3D printing, green tech.
- India:
- Ancient: Vishwakarma (temple engineering).
- Modern: IITs, automotive hubs (Pune, Chennai).
2. Basic Mechanical Principles- Force (F):
- Push/pull → change motion.
- Newton’s 2nd Law: F = ma.
- Units: Newton (N) = kg·m/s².
- Motion:
- Linear: v = u + at.
- Rotary: ω = θ/t, α = dω/dt.
- Energy (E):
- KE: 1/2mv², PE: mgh.
- Conservation: Eᵢₙ = Eₒᵤₜ.
- Work (W) & Power (P):
- W = F·d·cosθ (Joules).
- P = W/t (Watts).
- Examples:
- Lift 10 kg → 1 m → W = mgh = 98 J.
- Car engine: 100 HP = 74.6 kW.
3. Units & Dimensions- SI Units:
, 3
- Dimensions:
- F: [MLT⁻²].
- E: [ML²T⁻²].
- Tips:
- Always check units.
- Convert → SI.
4. Ethics & Professionalism
- Ethics:
- Safety, honesty, public welfare.
- Example: Design safe brakes for trains.
- Professionalism:
- Respect, teamwork, lifelong learning.
- Codes → ASME, IEEE, IEI (India).
- India:
- IEI Code: Integrity, competence.
- Responsibility → society, environment.
Multiple Choice QA
Q1. Which invention is considered a major milestone that accelerated the Industrial Revolution and
the development of mechanical engineering?
A) Telephone
B) Steam Engine
C) Radio
D) Computer
Answer: B) Steam Engine
Explanation: The steam engine, significantly improved by James Watt, revolutionized manufacturing,
transportation, and industrial processes.
, 4
Q2. Work is said to be done when:
A) A force acts on a body without displacement
B) A body moves without force
C) A force causes displacement in its direction
D) Energy is stored in a body
Answer: C) A force causes displacement in its direction
Explanation: Work = Force × Displacement × cos θ.
Q3. Power is defined as:
A) Force × Velocity
B) Work done per unit time
C) Energy stored per unit mass
D) Force × Distance
Answer: B) Work done per unit time
Explanation: Power = Work / Time. The SI unit of power is the Watt (W).
Q4. What is the SI unit of force?
A) Joule
B) Pascal
C) Newton
D) Watt
Answer: C) Newton
Explanation: One Newton (N) is the force required to accelerate a mass of 1 kg at 1 m/s².
Q5. According to engineering ethics, the primary responsibility of an engineer is to:
A) Maximize company profits
B) Satisfy client demands at any cost
C) Protect public safety, health, and welfare
D) Complete projects as quickly as possible
Answer: C) Protect public safety, health, and welfare
