NSC Ergonomics 2

Question 1

Which type of hand tool design best reduces wrist deviation during repetitive tasks?

Accepted Answer

Pistol-grip or bent-handle tool

Answer

Pistol-grip or bent-handle tools allow the wrist to remain in a neutral position, reducing ulnar or radial deviation stress.

Question 2

What is the primary ergonomic concern with prolonged use of a computer mouse?

Accepted Answer

Ulnar nerve compression and shoulder strain

Answer

Extended mouse use can compress the ulnar nerve at the wrist and cause shoulder strain from reaching away from the body.

Question 3

In the context of NSC ergonomics guidelines, what does 'neutral posture' refer to?

Accepted Answer

Body position where joints are not at extremes of their range of motion

Answer

Neutral posture means the body's joints are near the middle of their range of motion, minimizing stress on muscles and tendons.

Question 4

Which ergonomic principle applies when a worker adjusts their workstation to fit their body rather than adapting their body to the workstation?

Accepted Answer

Fitting the task to the worker

Answer

Fitting the task to the worker is a core ergonomic principle that modifies equipment or processes to suit human capabilities.

Question 5

A warehouse worker lifts boxes from floor level repeatedly. Which change would MOST reduce lumbar spine loading?

Accepted Answer

Raising the pallet to knee or mid-thigh height

Answer

Raising the starting height of the load reduces the forward trunk lean that dramatically increases lumbar compressive forces.

NSC Practice Test