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

Any space that requires a ladder to enter

Answer

Any underground vault or tank

Answer

A space that requires two or more employees to access

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 attendant

Answer

The authorized entrant

Answer

The safety officer

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

Enter the space to assist the entrant if needed

Answer

Test the atmosphere inside the space every 30 minutes

Answer

Maintain the ventilation equipment inside the space

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

Below 16% or above 25%

Answer

Below 18% or above 22%

Answer

Below 15% or above 20%

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

Temperature

Answer

Lighting levels

Answer

Noise levels

Question 6

Which of the following is a non-entry rescue method acceptable under OSHA's confined space standard?

Accepted Answer

Using a retrieval system with a lifeline attached to the entrant's body harness

Answer

Sending in a second employee with a respirator

Answer

Calling 911 and waiting for fire department rescue

Answer

Lowering a stretcher into the space