CIEE Repetitive Motion & CTD Prevention 5

Question 1

Which nerve conduction study finding confirms median nerve dysfunction at the carpal tunnel in a worker with suspected CTS?

Accepted Answer

Prolonged distal sensory or motor latency across the wrist

Answer

Electrodiagnostic CTS confirmation requires prolonged distal sensory and/or motor latency of the median nerve across the wrist, reflecting slowed conduction through the compressed carpal tunnel.

Question 2

A company implements a symptom surveillance program as part of its CTD prevention strategy. The PRIMARY purpose of early symptom reporting is to:

Accepted Answer

Identify emerging CTDs before they progress to irreversible structural damage

Answer

Early symptom surveillance catches CTDs at reversible stages, allowing timely ergonomic intervention before chronic structural changes such as tendon fibrosis or nerve demyelination occur.

Question 3

The ISO 11228-3 standard provides guidance for ergonomic assessment of:

Accepted Answer

Handling of low loads at high frequency (repetitive tasks)

Answer

ISO 11228-3 specifically covers ergonomic recommendations for handling low loads at high frequency, directly addressing repetitive motion risk in assembly and manufacturing jobs.

Question 4

A new power screwdriver has a no-load speed of 1,200 RPM and produces significant torque reaction. Which handle design feature BEST prevents the torque reaction from producing repetitive wrist injury?

Accepted Answer

Reaction bar or torque arm to absorb reactive force

Answer

A torque reaction bar or fixture-mounted torque arm absorbs the torque reaction at the tool mounting point rather than transmitting it through the operator's wrist.

Question 5

Which psychosocial work factor has been shown in research to INCREASE susceptibility to upper-extremity CTDs independent of physical loading?

Accepted Answer

High job demands combined with low control (job strain)

Answer

Job strain (high demands + low control) is associated with elevated musculoskeletal disorder risk through both physiological stress pathways and reduced ability to modify work pace or technique.

(CIEE) Certified Industrial Ergonomic Evaluator Practice Test

(CIEE) Certified Industrial Ergonomic Evaluator Practice Test

CIEE Repetitive Motion & CTD Prevention 5