Confined Spaces Quiz

By Vladimir / October 12, 2025

Think you know the essentials of confined space safety? Take this short quiz to check your understanding of OSHA 29 CFR 1910.146 requirements and safe work practices.

Instant feedback: After completing the quiz, you’ll receive a detailed email discussing your results and highlighting areas where additional review or training could be beneficial.
Certificate of Achievement: Participants who score 80% or higher will receive a certificate recognizing their confined space safety knowledge.

It only takes a few minutes to complete — click below to start the quiz and see how you measure up!

Confined Space Awareness Quiz (OSHA 29 CFR 1910.146)

This short quiz is designed to check your basic awareness and understanding of OSHA’s Confined Space standard (29 CFR 1910.146). It focuses on key definitions, hazard recognition, entry requirements, and safe work practices related to confined spaces.

The purpose of this quiz is to help reinforce essential safety knowledge and identify any areas where additional training or clarification may be needed. It is not a certification test, but a quick way to confirm your understanding of fundamental confined space safety concepts.

Take your time and answer each question carefully — your results will help guide future training and promote safer confined space operations in your workplace.

NameEmail

1 / 8

A host employer hires a contractor to clean a confined space but does not inform them about prior hazards.

Acceptable if contractor is trained

Violation – host employer must share known hazards and coordinate entry operations

Acceptable for short-term work

Contractor responsible for all testing

2 / 8

An entry supervisor authorizes entry into a tank without completing a confined space entry permit.

Acceptable if employees are trained

Acceptable for short-duration entries

Acceptable if the space was tested and found safe

Not acceptable – written permit must be completed before entry

3 / 8

A confined space has no hazardous atmosphere after continuous ventilation and testing.

Can be reclassified as non-permit if hazards are eliminated

Entry prohibited regardless

Automatically non-permit

Still permit-required

4 / 8

A new employee is assigned confined space duties before training, under supervision of an experienced coworker.

Acceptable for observation only

Acceptable if the space is ventilated

Not acceptable – training required before entry

Acceptable if supervised

5 / 8

Readings in a confined space show 18% oxygen and 3% hydrogen sulfide.

Unsafe – oxygen below 19.5%, H₂S exceeds safe limit

Acceptable if respirators are worn

Safe for entry with ventilation

Acceptable for inspection only

6 / 8

A maintenance worker must enter a large mixing tank to remove residue. The tank has limited entry, poor ventilation, and contains residual vapors.

Only requires PPE, not a permit

Normal workspace if ventilated

Not a confined space because it’s entered for maintenance only

Permit-required confined space – limited entry, potential hazardous atmosphere

7 / 8

Before entering a confined space, the attendant measures for carbon monoxide first, then oxygen, then flammable gases.

Incorrect – oxygen must be tested first, then flammables, then toxics

Acceptable testing sequence

Only oxygen levels are required

Test order doesn’t matter

8 / 8

A worker collapses inside a confined space, and the attendant enters to assist without proper rescue equipment.

Acceptable if oxygen level is safe

Not acceptable – attendant must not enter unless trained and equipped for rescue

Acceptable if entry is for rescue only

Acceptable if another employee is nearby

Your score is

The average score is 67%

Thank you for your feedback, we will use it to improve the quiz.

e-SafetyPro.com

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