Ergonomic Tools, Equipment & Technology Flashcards

What is the primary ergonomic advantage of a pistol-grip power tool over an inline (straight) grip tool for horizontal work surfaces?

Answer: Allows neutral wrist position when working on horizontal surfaces

A pistol grip aligns the forearm so the wrist remains neutral when driving fasteners into horizontal surfaces, whereas an inline grip requires wrist extension.

In ergonomic lighting assessment, a lux meter measures:

Answer: Illuminance (light falling on a surface)

A lux meter measures illuminance — the amount of light falling on a surface — which is compared to recommended levels for different task types.

Spring-loaded scissors (with return spring) are recommended ergonomically because they:

Answer: Eliminate the opening stroke muscle effort, reducing fatigue

The return spring passively opens the scissor blades, removing the need for the extensor muscles to actively open the fingers after each cut, halving cumulative exertion.

Exoskeleton devices used in industrial ergonomics primarily aim to:

Answer: Augment or offload forces on specific body segments during demanding tasks

Passive or powered exoskeletons redistribute load from vulnerable body regions (e.g., lumbar spine, shoulders) to stronger structures or actuators, reducing musculoskeletal strain.

What is the recommended minimum handle diameter for a power grip on hand tools?

Answer: 1.25–2.0 inches

Handle diameters of 1.25–2.0 inches (30–50 mm) allow maximum grip force generation and minimize contact stress on the palm.

Anti-vibration gloves are most effective at reducing vibration in which frequency range?

Answer: 25–200 Hz

Anti-vibration gloves provide meaningful attenuation primarily in the 25–200 Hz range; they are less effective at lower frequencies where most powerful tools operate.