STSC Confined Space Entry Procedures 4

Question 1

Under OSHA 29 CFR 1910.146, what must an employer do before reclassifying a permit-required confined space to a non-permit space?

Accepted Answer

Eliminate or control all hazards through continuous forced-air ventilation and document the conditions

Answer

An employer may reclassify a permit space to a non-permit space only by eliminating or continuously controlling all hazards and documenting that the space no longer poses a serious physical hazard.

Question 2

A worker inside a confined space reports feeling dizzy and disoriented. What is the FIRST action the attendant should take?

Accepted Answer

Order the entrant to exit the space immediately

Answer

The attendant's first priority is to order the entrant to exit the space immediately upon any sign of physiological distress.

Question 3

Which gas is often called a 'simple asphyxiant' and is particularly dangerous in confined spaces because it is odorless and colorless?

Accepted Answer

Nitrogen

Answer

Nitrogen is a simple asphyxiant that displaces oxygen without any warning odor or color, making it extremely dangerous in confined spaces.

Question 4

What is the minimum oxygen concentration required for safe entry into a confined space according to OSHA standards?

Accepted Answer

19.5%

Answer

OSHA requires a minimum of 19.5% oxygen concentration for safe entry into a confined space; below this level is considered oxygen-deficient.

Question 5

During confined space entry, the entry supervisor notices the permit has expired but work is not complete. What should occur?

Accepted Answer

A new permit must be issued after re-evaluating the space conditions

Answer

An expired permit is invalid; all entrants must exit and a new permit must be issued after re-evaluating all hazards and conditions.

(STSC) Safety Trained Supervisor Construction Practice Test

(STSC) Safety Trained Supervisor Construction Practice Test

STSC Confined Space Entry Procedures 4