CIEE Ergonomic Principles & Evaluation Techniques 3

Question 1

Which evaluation method uses time-lapse or video-based observation to code worker postures at predetermined intervals for exposure assessment?

Accepted Answer

OWAS (Ovako Working Posture Analysis System)

Answer

OWAS was developed for steel industry use and codes trunk, arm, and leg postures from video observations to quantify awkward posture exposure.

Question 2

In the context of ergonomic risk assessment, 'force coupling' refers to:

Accepted Answer

The combination of high force and high repetition as compounding risk factors

Answer

Force coupling (or the interaction of force and repetition) compounds musculoskeletal injury risk beyond what either factor alone would cause.

Question 3

An ergonomic evaluator is assessing a packaging line where workers perform 12,000 hand motions per shift. Which metric would best quantify the repetitiveness risk for this task?

Accepted Answer

Strain Index score based on frequency of exertions per minute

Answer

The Strain Index uses frequency of exertions per minute as a primary input to quantify the repetitiveness component of upper extremity risk.

Question 4

According to the NIOSH Work Practices Guide, which factor does NOT reduce the Recommended Weight Limit (RWL) when present?

Accepted Answer

Vertical origin height at knuckle level (75 cm)

Answer

A vertical origin of 75 cm (knuckle height) is the optimal lift origin and yields a vertical multiplier of 1.0, meaning it does not reduce the RWL.

Question 5

A worker reports hand-arm vibration exposure from operating a pneumatic grinder for 4 hours daily. The most appropriate first step in managing this hazard is to:

Accepted Answer

Quantify vibration exposure by measuring tool vibration magnitude and daily exposure A(8)

Answer

Quantifying vibration magnitude and daily exposure A(8) is the necessary first step to assess whether exposure exceeds action or limit values and to prioritize controls.

(CIEE) Certified Industrial Ergonomic Evaluator Practice Test

(CIEE) Certified Industrial Ergonomic Evaluator Practice Test

CIEE Ergonomic Principles & Evaluation Techniques 3