Practice Test Geeks(CEA) Certified Ergonomics Associate Practice Test
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Manual Material Handling Flashcards

7 cards from real CEA practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Manual Material Handling flashcards as text

  1. What is the primary purpose of the asymmetry multiplier (AM) in the NIOSH lifting equation?

    Answer: To reduce the RWL when lifts involve trunk rotation from the sagittal plane

    The asymmetry multiplier penalizes lifts that require trunk twisting, which adds torsional and shear stress to lumbar structures.

  2. Which handle coupling type yields the highest coupling multiplier (CM = 1.0) in the NIOSH equation?

    Answer: Good coupling — optimal handles within the power grasp zone

    Good coupling (CM = 1.0) means handles allow a full power grasp without requiring deviated or awkward wrist positions.

  3. A worker carries a 30 lb tote 150 feet to a workstation 20 times per shift. Which engineering control would MOST effectively reduce cumulative lumbar load?

    Answer: Replace the carry task with a wheeled cart or conveyor

    Eliminating the carrying task by substituting mechanical transport (cart or conveyor) removes cumulative lumbar loading entirely.

  4. Snook psychophysical tables are used primarily to determine which of the following?

    Answer: Acceptable force limits for lifting, lowering, pushing, pulling, and carrying based on worker self-selection

    Snook tables present maximum acceptable weights and forces based on psychophysical studies where workers self-selected loads they could sustain without excessive strain.

  5. A load's center of gravity is shifted unexpectedly during a lift. Which immediate injury mechanism is most likely?

    Answer: Sudden asymmetric spinal loading causing disc herniation

    Unexpected load shifts create sudden uncontrolled torques on the lumbar spine, substantially increasing the risk of acute disc herniation.

  6. When a worker must lower a heavy box from an overhead shelf, the NIOSH equation destination multipliers apply to the:

    Answer: Both origin and destination, with the lower RWL governing the task

    The NIOSH equation is applied at both the origin and destination; the more restrictive (lower) RWL controls task design.

  7. Which measure best quantifies spinal compressive force during a manual lift for biomechanical analysis?

    Answer: L4/L5 compression force in Newtons

    L4/L5 compression force (N) is the standard biomechanical criterion used to quantify spinal loading risk during lifting tasks.