LOCKOUT/TAGOUT
A technician shuts off a truck but leaves the batteries connected while replacing starter wiring.
What is an incomplete lockout?
This atmospheric condition is checked FIRST before entry.
What is oxygen concentration?
This should ALWAYS be verified before welding on a tanker.
What is atmospheric testing and product identification?
This should ALWAYS be used in addition to a hydraulic jack.
What are jack stands?
This document identifies the hazardous material inside a tanker.
What is shipping papers or a bill of lading?
This hidden hazard can remain even after a truck is powered down.
What is stored energy?
This OSHA term describes a confined space where hazards are eliminated—not merely controlled.
What is a non-permit confined space?
This class of fire extinguisher is commonly used in diesel shops.
What is ABC?
This type of injury commonly occurs when technicians bypass wheel chocks.
What is a struck-by or crush injury?
This DOT reference book is used during hazardous material emergencies.
What is the Emergency Response Guidebook (ERG)?
This suspension component can violently release energy if improperly serviced.
What is a brake chamber spring or suspension spring assembly?
A cargo tank tests safe at the manway but unsafe near the bottom. This explains why.
What is vapor stratification or heavier-than-air gases settling?
This invisible hazard is produced during welding and cutting operations.
What are toxic fumes or ultraviolet radiation?
This term describes equipment movement caused by residual pressure after shutdown.
What is unintended energy release?
This must occur before entering a cargo tank previously containing flammable material.
What is hazard assessment and atmospheric testing?
OSHA requires this before another employee removes someone else’s lock.
What is verification that the original employee is unavailable and specific removal procedures are followed?
This role is prohibited from entering the confined space during rescue unless properly trained and equipped.
What is the attendant?
This dangerous condition can occur when welding near chlorinated brake cleaner.
What is phosgene gas formation?
This OSHA principle requires employees to stop work when unsafe conditions exist.
What is the employee right and responsibility to refuse unsafe work?
This DOT requirement ensures tanker repairs meet certified standards.
What is the R-stamp/National Board repair process?
This is the MOST common behavioral reason technicians bypass lockout/tagout.
What is complacency or production pressure?
Under OSHA, continuous forced-air ventilation alone does NOT eliminate this requirement.
What is the confined space permit requirement?
This NFPA concept explains why combustible dust explosions can occur in enclosed spaces.
What is fuel-air ignition within explosive concentration limits?
This is the leading contributing factor in many experienced-technician injuries.
What is routine familiarity or overconfidence?
This is the PRIMARY danger when entering an “empty” tanker.
What is residual vapor atmosphere or oxygen deficiency?