ME-602 Machine Component Design - Jun 2026 Question Paper

Under each question, How to answer lists the points an answer should cover, outlined by CampusPrep from the syllabus. Check the details against your textbook.

1. 7 Marks
   aDiscuss design considerations for fatigue loading in machine elements.
   How to answer

   • Define fatigue loading and S-N / endurance limit concept
   • List design considerations: stress concentration, surface finish, size, reliability, temperature
   • Explain safety factors and modification factors
   • Discuss material selection and preventive measures
2. 7 Marks
   bExplain fluctuating stresses and discuss Goodman, Modified Goodman with neat diagrams.
   How to answer

   • Define fluctuating / repeated stresses with mean and amplitude
   • Explain Goodman line diagram and equation
   • Explain Modified Goodman diagram with yield limit
   • Compare applications with neat sketches
3. 7 Marks
   aExplain the design procedure of shafts subjected to combined bending and torsion.
   How to answer

   • State bending and torsional moment effects on shaft
   • Derive equivalent bending and equivalent torque using max shear / max normal theory
   • Give design steps: power-torque, bending moment, shock factors, diameter
   • Mention ASME code factors and check for rigidity
4. 7 Marks
   bA solid steel shaft transmits $75\ \text{kW}$ power at $300\ \text{rpm}$. The shaft is subjected to a bending moment of $4\ \text{kN}\cdot\text{m}$ due to pulley loads and a torque due to power transmission. The allowable shear stress for the shaft material is $50\ \text{MPa}$. Using the maximum shear stress theory, determine the required diameter of the shaft.
   How to answer

   • Calculate torque from $P = 2\pi N T/60$
   • Given bending moment $M = 4\ \text{kN}\cdot\text{m}$ and allowable shear $50\ \text{MPa}$
   • Apply maximum shear stress theory: $T_{eq} = \sqrt{M^2+T^2}$
   • Solve $T_{eq} = (\pi/16) d^3 \tau_{allow}$ for diameter d
5. 7 Marks
   aExplain fatigue loading in springs and discuss spring failure.
   How to answer

   • Define fatigue / fluctuating loading in springs
   • Explain causes of spring failure: overloading, corrosion, resonance, defects
   • Discuss stress concentration and endurance considerations
   • Suggest remedial design and material aspects
6. 7 Marks
   bA close-coiled helical spring made of steel wire of diameter $12\ \text{mm}$ has a mean coil diameter of $96\ \text{mm}$ and $10$ active coils. The spring is subjected to an axial load of $1200\ \text{N}$. Determine the maximum shear stress and deflection of the spring. Take modulus of rigidity $G = 80\ \text{GPa}$.
   How to answer

   • Compute spring index $C = D/d$ and Wahl factor $K$
   • Calculate maximum shear stress $\tau = K \cdot 8PD/(\pi d^3)$
   • Calculate deflection $\delta = 8PD^3n/(Gd^4)$
   • Substitute $d=12\ \text{mm}, D=96\ \text{mm}, n=10, P=1200\ \text{N}, G=80\ \text{GPa}$
7. 7 Marks
   aExplain the design of single plate and multi-plate clutches.
   How to answer

   • Define single-plate and multi-plate clutches
   • Explain construction and torque transmission formula
   • Discuss uniform pressure vs uniform wear theory
   • Compare applications and design steps
8. 7 Marks
   bA band brake acts on a drum of diameter $600\ \text{mm}$ rotating at $250\ \text{rpm}$ and absorbs $20\ \text{kW}$ power. The coefficient of friction between the band and the drum is $0.3$, and the angle of contact is $210^\circ$. Determine the tensions in the tight side and slack side of the band.
   How to answer

   • Calculate braking power and tangential force from $P = (T1-T2)v$
   • Use capstan relation $T1/T2 = e^{\mu\theta}$ with $\theta=210^\circ$
   • Solve for tight-side tension T1 and slack-side tension T2
   • Check units: drum dia 600 mm, 250 rpm, mu=0.3
9. 7 Marks
   aExplain the design procedure of journal bearings.
   How to answer

   • Define journal bearing and hydrodynamic lubrication
   • List design parameters: L/D, clearance, lubricant, Sommerfeld number
   • Give step-by-step design procedure with checks
   • Mention heat balance and material selection
10. 7 Marks
    bCompare journal bearings and rolling contact bearings with suitable examples.
    How to answer

    • Define journal (sliding) vs rolling contact bearings
    • Compare on friction, load capacity, speed, life, maintenance
    • Give suitable examples of each type
    • Summarize selection criteria in table
11. 7 Marks
    aCompare helical, leaf, and torsion springs with suitable examples.
    How to answer

    • Define helical, leaf and torsion springs with sketches
    • Compare on construction, load type, energy storage
    • Give applications: suspension, automobile, hinges
    • Summarize differences in table
12. 7 Marks
    bExplain friction materials used in brakes and clutches with their properties.
    How to answer

    • List friction material types: asbestos, sintered metal, cermet, organic
    • Explain required properties: high mu, heat resistance, wear resistance
    • Discuss selection for brakes vs clutches
    • Give examples of applications
13. 7 Marks
    aExplain the design of shafts subjected to axial load and dynamic loading.
    How to answer

    • Explain axial and dynamic / shock loading effects on shaft
    • Discuss combined stress and fatigue factors
    • Give design steps with shock and fatigue factors
    • Mention ASME procedure and checks
14. Marks
    bDiscuss Soderberg, and Gerber criteria with neat diagrams.
    How to answer

    • Define Soderberg and Gerber fatigue criteria
    • Draw neat mean vs alternating stress diagrams
    • Write equations for each criterion
    • Discuss applications and conservatism
15. 14 Marks
    Write short notes on any two:

    1. (a))S-N Curve
    2. (b))Design of power screw
    3. (c))Design of rope brake.
    4. (d))Reynolds equation in journal bearings.
    How to answer

    • For chosen topics define key terms and formulas
    • Explain design steps / theory with sketches
    • Give applications and influencing factors
    • Conclude with significance in machine design