CIH CIH Ergonomics & Human Factors 2

Question 1

Which observational ergonomic assessment tool uses a body posture coding system to rate the risk of upper-extremity disorders?

Accepted Answer

RULA (Rapid Upper Limb Assessment)

Answer

RULA (Rapid Upper Limb Assessment) scores postures of the upper arm, lower arm, wrist, neck, trunk, and legs to estimate musculoskeletal risk levels.

Question 2

The ACGIH TLV for Hand Activity Level (HAL) uses what two variables to determine acceptable hand-intensive work limits?

Accepted Answer

Hand Activity Level and peak hand force

Answer

The ACGIH HAL TLV plots Hand Activity Level (0–10 scale of exertion frequency and recovery) against normalized peak hand force to identify action limit and TLV boundaries.

Question 3

What is the primary goal of an ergonomic job hazard analysis (JHA)?

Accepted Answer

Identify and control ergonomic risk factors before injury occurs

Answer

An ergonomic JHA systematically identifies task-level ergonomic stressors and prioritizes engineering, administrative, or PPE controls to prevent MSDs.

Question 4

Whole-body vibration (WBV) is primarily associated with which occupational setting?

Accepted Answer

Operators of vehicles and heavy mobile equipment

Answer

WBV affects workers operating forklifts, trucks, tractors, and heavy equipment, with vibration transmitted through the seat or floor to the entire body, contributing to low back disorders.

Question 5

Which hierarchy of controls is MOST preferred when addressing an identified ergonomic hazard?

Accepted Answer

Engineering controls such as redesigning the workstation

Answer

Engineering controls (workstation redesign, tool modification, mechanical assists) are most effective because they eliminate or reduce the hazard at the source.

CIH - Certified Industrial Hygienist Exam Practice Test

CIH - Certified Industrial Hygienist Exam Practice Test

CIH CIH Ergonomics & Human Factors 2