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Design and technology
Levers and linkages: interactive books

Starter quiz

  • Which of these linkages work in the same way?
    • bell crank
    • parallel  ✓
    • push pull  ✓
    • reverse motion
  • How many pivot points are there on a bell crank linkage?
    • 2 - one loose and one fixed
    • 3 - two loose and one fixed  ✓
    • 3 - two fixed and one loose
    • 4 - two fixed and two loose
  • What do we call the effort needed to start movement in a mechanism?
    • 'input' ✓
  • What does 'opposite direction' mean?
    • a similar direction
    • the same direction
    • the wrong direction
    • the reverse direction  ✓
  • A 90 degree angle is also known as a...
    • fixed angle
    • right angle  ✓
    • left angle
    • quarter angle
  • Match the linkage to the description.
    • Lazy-tong
      ⇔
      Lengthens and shortens when it is pushed or pulled. ✓
    • Bell crank
      ⇔
      Has levers that move at right angles to each other. ✓
    • Parallel
      ⇔
      Has two pairs of levers that move in the same way. ✓
    • Reverse motion
      ⇔
      Creates an output opposite to the input. ✓
    • Push Pull
      ⇔
      Creates an output in the same direction as the input. ✓
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