CHST Confined Space Entry and Rescue 3

Question 1

Three characteristics that define a 'confined space' under OSHA include all of the following EXCEPT:

Accepted Answer

Contains electrical or mechanical hazards

Answer

Large enough for an employee to bodily enter and perform work

Answer

Limited or restricted means for entry or exit

Answer

Not designed for continuous employee occupancy

Question 2

When must the atmosphere of a permit-required confined space be monitored during entry operations?

Accepted Answer

Continuously throughout the duration of all entry operations

Answer

Only during initial entry before work begins

Answer

Every 30 minutes while workers are inside

Answer

Only when mechanical ventilation is not in use

Question 3

What retrieval system components are required when workers enter a permit-required confined space where non-entry rescue may be needed?

Accepted Answer

Full-body harness and wristlets connected to a retrieval line and mechanical lifting device outside the space

Answer

Standard work belt with a rope tied to a fixed point inside the space

Answer

Self-contained breathing apparatus with a buddy system inside

Answer

A retrieval rope attached to the worker's ankle and secured to the entrance

Question 4

Under what circumstance is it permissible for the confined space attendant to enter the permit space?

Accepted Answer

Never — the attendant must not enter the permit space under any circumstances

Answer

When an entrant calls for help and no rescue service is immediately available

Answer

When equipped with an SCBA and rescue harness

Answer

When authorized by the entry supervisor and rescue services are delayed

Question 5

An entrant working inside a permit-required confined space notices an unusual odor and begins to feel dizzy. What is the correct immediate action?

Accepted Answer

Immediately exit the space and notify the attendant

Answer

Notify the attendant and continue working while the hazard is assessed

Answer

Don the supplied-air respirator stored inside the space and continue the task

Answer

Wait for the entry supervisor to arrive and authorize evacuation

Question 6

Which condition would require a permit-required confined space entry operation to be terminated immediately?

Accepted Answer

Detection of a prohibited condition such as an oxygen level drop to 18%

Answer

A work shift change requiring new entrants to replace current workers

Answer

The entry permit expiration time is approaching within 2 hours

Answer

A new worker arrives who was not listed on the original entry permit

Question 7

What is the OSHA definition of a 'competent person' in the context of confined space evaluation on a construction site?

Accepted Answer

A person capable of identifying existing and predictable hazards and authorized to take prompt corrective action

Answer

A person who has completed a 30-hour OSHA construction safety course

Answer

A person holding a state-issued confined space entry certification

Answer

A person with at least 5 years of experience working in confined spaces