Safety Procedures & PPE Flashcards
7 cards from real AM practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Safety Procedures & PPE flashcards as text
What is the hazard classification of liquid oxygen (LOX) used in aircraft oxygen systems?
Answer: Oxidizer and cryogenic hazard
LOX is both a cryogenic hazard (causing cryogenic burns at −183°C) and a strong oxidizer that greatly accelerates combustion of other materials.
When must a safety observer be present during aircraft fuel cell entry?
Answer: Always—OSHA requires an attendant outside every permit-required confined space
OSHA 29 CFR 1910.146 mandates an attendant stationed outside every permit-required confined space entry at all times to monitor entrants and summon rescue.
Which sign color and shape combination indicates a mandatory action (e.g., 'Wear hearing protection')?
Answer: Blue circle with a white pictogram
ISO 7010 and OSHA use a blue circle to indicate mandatory action signs, requiring the depicted protective equipment or behavior.
Before using an abrasive wheel on a bench grinder in the hangar, what inspection is required?
Answer: Visual inspection and ring test (tap test) to detect cracks
A visual inspection combined with a ring (tap) test—a clear ring indicates an intact wheel; a dull thud indicates cracks—must be performed before each use per OSHA 1910.215.
What is 'tool control' in the context of aircraft maintenance safety?
Answer: Accounting for all tools before and after a maintenance task to prevent FOD
Tool control is a systematic process—typically using shadow boards or tool control logs—that ensures every tool is accounted for to prevent foreign object debris (FOD) from being left inside an aircraft.
Which of the following correctly describes a 'buddy system' as used in aviation maintenance safety?
Answer: One technician monitoring another during hazardous operations such as confined space entry or working at height
A buddy system pairs a working technician with an observer during high-risk tasks to provide immediate assistance or emergency response if an incident occurs.
Why must non-sparking tools be used when working inside or near aircraft fuel tanks?
Answer: Metal-on-metal sparks can ignite residual fuel vapors in the explosive range (1.3–7.6% for Jet-A)
Residual fuel vapors in tanks can form flammable mixtures; a single spark from standard steel tools can trigger an explosion, so non-sparking (brass, bronze, or beryllium copper) tools are mandatory.