OSHA Confined Space Entry

Question 1

Under OSHA 29 CFR 1910.146, what is the definition of a permit-required confined space?

Accepted Answer

A space large enough to enter, with limited entry/exit, and not designed for continuous occupancy, plus one or more serious hazard

Answer

OSHA defines a permit-required confined space as a space meeting all three size/entry criteria AND containing at least one serious hazard such as a hazardous atmosphere, engulfment risk, or converging walls.

Question 2

Who is responsible for signing and authorizing an entry permit for a permit-required confined space?

Accepted Answer

The entry supervisor

Answer

The entry supervisor is responsible for signing the entry permit, verifying all conditions are acceptable, and authorizing entry into a permit-required confined space.

Question 3

What is the primary duty of an attendant during confined space entry operations?

Accepted Answer

Remain outside the space and monitor entrants and conditions continuously

Answer

The attendant must remain outside the permit space, keep count of entrants, monitor conditions, and initiate rescue if necessary — they must never enter the space themselves.

Question 4

What atmospheric oxygen level is considered immediately dangerous to life or health (IDLH) in a confined space?

Accepted Answer

Below 19.5% or above 23.5%

Answer

OSHA specifies that an atmosphere with less than 19.5% or more than 23.5% oxygen is considered hazardous and requires respiratory protection or ventilation.

Question 5

Before an employee enters a permit-required confined space, what must be tested first?

Accepted Answer

Atmospheric conditions (oxygen, flammable gases, toxic substances)

Answer

OSHA requires that atmospheric conditions be tested for oxygen content, flammable gases/vapors, and potential toxic air contaminants before any entry occurs.

OSHA Safety Certificate Practice Test

OSHA Safety Certificate Practice Test

OSHA Confined Space Entry