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Stability Triangle & Tip-Over Prevention Flashcards

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  1. What geometric shape defines the stability zone of a counterbalanced forklift?

    Answer: Triangle

    The stability zone of a counterbalanced forklift is a triangle formed by the two front wheels and the center pivot point of the rear steer axle.

  2. Which three points form the stability triangle on a standard counterbalanced forklift?

    Answer: The two front drive wheels and the rear axle pivot point

    The stability triangle connects the two front drive wheels and the center pivot point of the rear steer axle, defining the zone within which the combined center of gravity must remain.

  3. A forklift will tip over when its combined center of gravity moves:

    Answer: Outside the stability triangle

    Tip-over occurs when the combined center of gravity of the forklift and its load shifts outside the boundaries of the stability triangle.

  4. What is the OSHA-recommended action if a forklift begins to tip over sideways?

    Answer: Stay in seat, grip the steering wheel firmly, and lean away from impact

    OSHA recommends operators stay in the seat, grip the steering wheel firmly, brace their feet, and lean away from the direction of the fall to use the overhead guard for protection.

  5. How does elevating a load above the recommended travel height affect stability?

    Answer: It raises the combined center of gravity and reduces stability

    Raising a load increases the height of the combined center of gravity, making the forklift more susceptible to tipping, especially during turns or on uneven surfaces.

  6. Which action while cornering most increases the risk of a lateral tip-over?

    Answer: Turning at high speed with a raised load

    Turning at high speed with a raised load generates centrifugal force while the center of gravity is already elevated, greatly increasing the risk of pushing it outside the stability triangle.

  7. Around which axis does a forward longitudinal tip-over primarily occur?

    Answer: The front axle

    A forward longitudinal tip-over pivots around the front axle — the front wheels act as the fulcrum when the load's moment overcomes the counterbalance.