CEA Industrial Ergonomics 3

Question 1

Which factor does the ACGIH Hand Activity Level (HAL) TLV primarily quantify?

Accepted Answer

Combined hand activity frequency and exertion pattern

Answer

The HAL TLV is based on the frequency of hand motions and duty cycle (exertion-to-rest ratio) to characterize repetitive hand/wrist exposure.

Question 2

A worker experiences hand-arm vibration while operating a grinder. Which health outcome is specifically associated with this exposure?

Accepted Answer

Raynaud's phenomenon (vibration white finger)

Answer

Prolonged hand-arm vibration exposure can cause vibration white finger (VWF), a form of Raynaud's phenomenon involving vascular and neurological damage.

Question 3

In the RULA (Rapid Upper Limb Assessment) method, a score of 7 indicates:

Accepted Answer

Implement changes immediately

Answer

A RULA grand score of 7 is the highest level, indicating the posture is unacceptable and changes must be implemented immediately.

Question 4

Which design change BEST reduces shoulder loading for overhead assembly work?

Accepted Answer

Using articulating arms or lift assists to bring parts to elbow height

Answer

Articulating arms or positioning systems that bring work to elbow height eliminate overhead reach, dramatically reducing deltoid and shoulder muscle loading.

Question 5

What is 'dead man's hand' or 'trigger finger' most associated with in industrial ergonomics?

Accepted Answer

Repetitive or sustained flexion of finger tendons combined with high grip force

Answer

Trigger finger (stenosing tenosynovitis) results from repetitive forceful gripping causing tendon sheath inflammation, making finger flexion catching or locking.

(CEA) Certified Ergonomics Associate Practice Test

(CEA) Certified Ergonomics Associate Practice Test

CEA Industrial Ergonomics 3