CSS CSS - Certified Safety Supervisor Ergonomics and Confined Space Safety Questions and Answers

Question 1

Under OSHA 29 CFR 1910.146, what defines a 'permit-required confined space'?

Accepted Answer

A space that contains or has potential for a hazardous atmosphere, engulfment, or other recognized serious safety hazard

Answer

Any space smaller than 4 ft × 4 ft

Answer

Any enclosed space requiring a ladder to enter

Answer

A space with limited lighting only

Question 2

What is the minimum oxygen concentration considered acceptable in a confined space atmosphere per OSHA standards?

Accepted Answer

19.5%

Answer

16.5%

Answer

21%

Answer

23.5%

Question 3

Which ergonomic risk factor is most associated with cumulative trauma disorders (CTDs) of the upper extremities?

Accepted Answer

High repetition combined with forceful exertions

Answer

Static posture only

Answer

Cold temperatures alone

Answer

Vibration only

Question 4

The Waters equation (NIOSH Lifting Equation) calculates which value to guide safe manual lifting?

Accepted Answer

Recommended Weight Limit (RWL)

Answer

Maximum allowable weight per shift

Answer

Cumulative trauma threshold

Answer

Fatigue allowance index

Question 5

What is the role of an 'attendant' in a confined space entry operation under 29 CFR 1910.146?

Accepted Answer

To remain outside, track authorized entrants, and initiate rescue if needed

Answer

To enter the space and monitor air quality from inside

Answer

To sign the permit and authorize entry

Answer

To operate the ventilation equipment inside the space

Question 6

Which condition would trigger non-entry rescue rather than entry rescue for a confined space?

Accepted Answer

Entrant becomes incapacitated in an IDLH atmosphere without a rescue team on site

Answer

Entrant slips on a wet surface inside

Answer

Entrant requests assistance removing equipment

Answer

Entrant loses communication for 30 seconds