CES Office Ergonomics & Computer Workstations 2

Question 1

What is the recommended minimum seat pan depth adjustment range for office chairs?

Accepted Answer

2–4 inches

Answer

A seat pan depth range of 2–4 inches accommodates variation in thigh length while maintaining 2–3 finger-widths of clearance behind the knee.

Question 2

The 20-20-20 rule for computer users recommends:

Accepted Answer

Every 20 minutes look at something 20 feet away for 20 seconds

Answer

The 20-20-20 rule helps reduce digital eye strain by giving the ciliary muscles a rest through distant focusing every 20 minutes.

Question 3

An ergonomic mouse should be selected primarily based on which criterion?

Accepted Answer

Hand size and grip style of the user

Answer

Mouse fit to hand size and grip style (palm, claw, or fingertip) is the primary criterion because a poorly sized mouse causes sustained awkward postures.

Question 4

Which type of office lighting arrangement best reduces veiling reflections on monitor screens?

Accepted Answer

Luminaires placed parallel to and between workstations

Answer

Placing overhead luminaires parallel to workstation rows and between workstations prevents direct overhead light from reflecting off monitor screens into the user's eyes.

Question 5

Which standard provides ergonomic guidelines specifically for office workstations with display screen equipment in the US?

Accepted Answer

ANSI/HFES 100

Answer

ANSI/HFES 100 (Human Factors Engineering of Computer Workstations) provides US-specific dimensional and design recommendations for display screen workstations.

CES - Certified Ergonomic Specialist Practice Test

CES - Certified Ergonomic Specialist Practice Test

CES Office Ergonomics & Computer Workstations 2