Practice question What does the abbreviation SCBA stand for? Standard Chemical Breathing ApparatusSelf-Contained Breathing ApparatusSupplemental Chemical-Biological ApparatusSafety Certified Breathing Assembly Answer: B — Self-Contained Breathing Apparatus The correct answer is shown above. Try the full quiz for additional practice. Practice more: Hazmat Technician Practice Questions - Hazardous Materials Technician Exam →