CES Ergonomic Tools, Equipment & Technology 2

Question 1

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

Accepted Answer

Allows neutral wrist position when working on horizontal surfaces

Answer

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

Question 2

In ergonomic lighting assessment, a lux meter measures:

Accepted Answer

Illuminance (light falling on a surface)

Answer

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

Question 3

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

Accepted Answer

Eliminate the opening stroke muscle effort, reducing fatigue

Answer

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.

Question 4

Exoskeleton devices used in industrial ergonomics primarily aim to:

Accepted Answer

Augment or offload forces on specific body segments during demanding tasks

Answer

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

Question 5

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

Accepted Answer

1.25–2.0 inches

Answer

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

CES - Certified Ergonomic Specialist Practice Test

CES - Certified Ergonomic Specialist Practice Test

CES Ergonomic Tools, Equipment & Technology 2