NSC Ergonomics 4

Question 1

Which ergonomic risk factor is defined as the number of times a motion or exertion is performed within a given time period?

Accepted Answer

Repetition

Answer

Repetition refers to how frequently a motion or exertion is performed, and high repetition rates are a primary ergonomic risk factor for MSDs.

Question 2

What is the NSC-recommended approach when an ergonomic hazard cannot be eliminated entirely?

Accepted Answer

Apply multiple controls in combination (hierarchy of controls)

Answer

When hazards can't be eliminated, combining engineering, administrative, and PPE controls from the hierarchy offers the best protection.

Question 3

A production line worker experiences pain in the tendons of the forearm. This condition is MOST consistent with which MSD?

Accepted Answer

Tendinitis

Answer

Tendinitis is inflammation of tendons, commonly affecting the forearm of workers performing repetitive gripping or twisting motions.

Question 4

Which ergonomic guideline addresses the risk of awkward posture by specifying elbow height for work surface placement?

Accepted Answer

Work surfaces for precision tasks should be slightly above elbow height

Answer

Precision tasks benefit from a surface slightly above elbow height to support the forearms and provide close visual access without neck flexion.

Question 5

In ergonomics, 'duration' as a risk factor refers to:

Accepted Answer

The length of time a worker is exposed to a hazardous condition or posture

Answer

Duration measures how long a worker is continuously exposed to a risk factor, with longer exposures increasing injury risk.

NSC Practice Test