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Mechanisms and Structures module quiz: Singapore O-Level Design and Technology (SEAB 7059) quiz

15questions. Pick an answer and you'll see why right away.

  1. What does the principle of moments state for a balanced lever?

  2. A load of 400 N sits 0.3 m from a pivot. What effort, applied 1.2 m from the pivot, will balance it?

  3. How is mechanical advantage calculated?

  4. A lever lifts a 600 N load with an effort of 150 N. What is its mechanical advantage?

  5. What does a linkage do in a mechanism?

  6. Which linkage changes the direction of an input push into an output pull on a parallel rod?

  7. How is the gear ratio of a simple gear pair calculated?

  8. A driver gear of 15 teeth meshes with a driven gear of 45 teeth, turning at 600 rev/min input. What is the output speed?

  9. What is the purpose of an idler gear?

  10. How is the velocity ratio of a simple belt-and-pulley drive calculated?

  11. What is one advantage of a belt drive over a gear drive?

  12. In a structure, what is a member in compression called?

  13. Why does triangulation make a frame structure stronger?

  14. What gives a product good stability?

  15. A reduction gear train (ratio above 1) has what effect on the output?