Skip to main content

← back to the guide

Mechanisms and Structures module quiz: Singapore N(A)-Level Design and Technology (SEAB 7055) quiz

16questions. Pick an answer and you'll see why right away.

  1. What is the formula for the moment of a force about a pivot?

  2. A child of 300 N sits 1.5 m from a seesaw pivot. What moment do they create?

  3. On a balanced seesaw, a 450 N child must balance a moment of 450 N m. How far from the pivot do they sit?

  4. What is the principle of moments?

  5. Which feature defines the three classes of lever?

  6. A driver gear has 20 teeth and meshes with a driven gear of 60 teeth. What is the gear ratio?

  7. With a gear ratio of 3 to 1, if the driver turns at 90 rev/min, how fast does the driven gear turn?

  8. What happens to turning force (torque) when a gear train reduces the output speed?

  9. What is the main job of an idler gear?

  10. Two gears mesh directly with no idler between them. How do they turn?

  11. In a belt-and-pulley drive, what does a crossed belt do compared with an open belt?

  12. One advantage of a belt-and-pulley drive over a gear train is that:

  13. A structural member that is being pulled or stretched is in:

  14. Why does triangulation make a frame structure stronger?

  15. Which change would make a tall, narrow shelving unit more stable?

  16. Shaping a flat sheet of material into a tube or fold mainly: