CIEE Repetitive Motion & CTD Prevention 3

Question 1

A keyboard operator reports tingling in the thumb, index, and middle fingers that worsens at night. The MOST likely CTD diagnosis is:

Accepted Answer

Carpal tunnel syndrome

Answer

Nocturnal tingling in the median nerve distribution (thumb, index, middle finger) is a hallmark presentation of carpal tunnel syndrome.

Question 2

Job rotation is used as an administrative control for CTDs. For rotation to be effective, the alternate job must primarily differ in which characteristic?

Accepted Answer

The specific muscle groups and joints loaded

Answer

Effective job rotation requires that the alternate task loads different muscle groups and joints, preventing cumulative exposure on the same tissues.

Question 3

Which tool feature BEST reduces ulnar deviation during a repetitive assembly task?

Accepted Answer

Angled or bent handle that keeps the wrist in neutral

Answer

An angled handle (pistol-grip or bent) allows the wrist to remain straight/neutral while the tool axis aligns with the work, eliminating chronic ulnar deviation.

Question 4

In the context of CTD prevention, the term 'recovery time ratio' refers to the proportion of:

Accepted Answer

Work-rest cycle dedicated to low-load or no-load recovery relative to exertion time

Answer

Recovery time ratio describes how much of the work cycle is devoted to tissue recovery (low force/rest) versus active exertion, with higher ratios reducing cumulative strain.

Question 5

Lateral epicondylitis (tennis elbow) in industrial workers is MOST closely associated with which job demand?

Accepted Answer

Repetitive wrist extension combined with forearm pronation

Answer

Lateral epicondylitis involves overload of the wrist extensor muscles that originate at the lateral epicondyle, commonly caused by repetitive wrist extension and forearm pronation.

(CIEE) Certified Industrial Ergonomic Evaluator Practice Test

(CIEE) Certified Industrial Ergonomic Evaluator Practice Test

CIEE Repetitive Motion & CTD Prevention 3