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OCR A-Level Product Design structures, mechanisms and electronic systems overview quiz quiz

14questions. Pick an answer and you'll see why right away.

  1. A drinks can, with a thin outer skin carrying the load, is an example of which structure?

  2. A moment is calculated as:

  3. A 60 N load hangs 0.30 m from a pivot. A strut acts 0.10 m from the pivot. What force keeps the system in equilibrium?

  4. Triangulation stiffens a frame because it:

  5. A wheelbarrow is which class of lever?

  6. Mechanical advantage for an ideal lever is calculated as:

  7. A driver gear of 20 teeth meshes with a driven gear of 60 teeth. The gear ratio is:

  8. If that driver turns at 300 rpm, the 60-tooth driven gear turns at:

  9. A cam and follower is used to:

  10. A 30 mm driver pulley drives a 90 mm pulley at a motor speed of 1500 rpm. The output speed is:

  11. Ohm's law states that:

  12. A 12 V supply drives 0.04 A through a resistor. Its resistance is:

  13. In an LDR, the resistance:

  14. A potential divider has a 2 kilohm LDR on top and a 10 kilohm fixed resistor at the bottom across a 9 V supply, with the output across the fixed resistor. The output voltage is: