Codes, Regulations, and Safety Practices
Codes, Regulations, and Safety Practices
This domain tests code jurisdiction, inspection, permits, lockout/tagout, confined-space entry, hot work, incident reporting, and environmental compliance. Fourth Class candidates must know when a task requires authorization and documentation.
Core rules
- Boilers and pressure vessels are inspected under the applicable code and jurisdiction; nameplate and certificate must match the installation.
- Confined-space entry requires atmospheric testing, isolation, ventilation, attendant, and permit.
- Hot work requires a permit, fire watch, and removal or protection of combustibles.
- Lockout/tagout isolates energy sources and verifies zero energy.
- Report accidents, near misses, and code violations through the site procedure; do not conceal them.
Worked example
A confined-space permit requires oxygen between 19.5% and 23.5%. A reading of 18.0% is oxygen-deficient. Entry must be denied, ventilation and testing repeated, and the space reclassified if needed. Reason: the permit is valid only while test results and controls meet the entry conditions.
Traps
Do not treat a permit as permission to skip testing; do not enter a space to rescue someone without trained backup and equipment; do not perform hot work on a tank that has not been cleaned and tested; and do not assume a boiler inspection certificate transfers to a new location.