SAF Workplace Ergonomics & Health 2

Question 1

Which keyboard placement best reduces wrist extension and ulnar deviation during typing?

Accepted Answer

Keyboard tilted away from the user (negative tilt)

Answer

A negative keyboard tilt keeps the wrists in a neutral or slightly extended position, reducing ulnar deviation and strain.

Question 2

A worker reports numbness and tingling in the ring and little fingers after prolonged elbow flexion. Which nerve is most likely compressed?

Accepted Answer

Ulnar nerve

Answer

The ulnar nerve runs behind the medial epicondyle and is compressed by prolonged elbow flexion, causing symptoms in the ring and little fingers.

Question 3

What is the recommended maximum angle of neck flexion for sustained computer work to minimize cervical strain?

Accepted Answer

0–15 degrees

Answer

Neck flexion beyond 15 degrees significantly increases compressive forces on the cervical spine and should be avoided for sustained work.

Question 4

Under OSHA's ergonomics guidance, what is the first recommended action when a worker reports early signs of a musculoskeletal disorder (MSD)?

Accepted Answer

Provide early symptom reporting and prompt health care referral

Answer

Early reporting systems and prompt health care referral are central to OSHA's MSD management approach, preventing progression of injuries.

Question 5

Which lighting measurement unit is used to quantify illuminance on a work surface?

Accepted Answer

Foot-candle (lux)

Answer

Foot-candles (or lux in SI units) measure illuminance — the amount of light hitting a surface per unit area.

(SAF) Safety Assessment Federation Certification Practice Test