Machine Design Fundamentals Knowledge Test

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1. 1

   What is the primary purpose of a flywheel in mechanical systems?

   A To store rotational energy B To increase friction C To reduce noise
2. 2

   In material selection, what does the term 'ductility' refer to?

   A Resistance to scratching B Resistance to oxidation C Ability to deform under tensile stress
3. 3

   For a simple gear train, what does the 'gear ratio' help determine?

   A The mechanical advantage B The thermal expansion C The noise level
4. 4

   What characteristic of a beam affects its deflection the most?

   A Length B Moment of inertia C Density
5. 5

   Which type of stress primarily acts on a bolted joint under axial loading?

   A Shear stress B Tensile stress C Compressive stress
6. 6

   What element is added to steel to improve its ability to harden through heat treatment?

   A Aluminum B Nickel C Carbon
7. 7

   In a stress-strain curve, what does the 'yield point' signify?

   A The maximum strength B The onset of permanent deformation C The start of the elastic region
8. 8

   Which factor does NOT affect the fatigue life of a material?

   A Mean stress B Color of the material C Surface finish
9. 9

   What is the function of a key in a mechanical shaft?

   A To transmit torque B To reduce weight C To absorb shock
10. 10

    Which material is generally used for ball bearings?

    A Aluminum B Chrome steel C Copper
11. 11

    What component increases the load-carrying capacity in a belt drive system?

    A Pulley diameter B Belt tension C Belt length