AM Safety Procedures & PPE 2

Question 1

When working in a confined space on an aircraft, what is the minimum requirement before entry?

Accepted Answer

Atmospheric testing for oxygen, flammable, and toxic gases

Answer

Confined space entry requires atmospheric testing to confirm oxygen levels (19.5–23.5%) and absence of hazardous gases before anyone enters.

Question 2

Which class of fire extinguisher is appropriate for an electrical fire in an avionics bay?

Accepted Answer

Class C

Answer

Class C extinguishers use non-conductive agents and are rated for fires involving energized electrical equipment.

Question 3

What does the term 'lockout/tagout' (LOTO) specifically prevent during aircraft maintenance?

Accepted Answer

Unexpected energization or release of stored energy

Answer

LOTO procedures isolate energy sources—electrical, hydraulic, pneumatic, or mechanical—to prevent accidental startup or energy release while personnel work on equipment.

Question 4

A technician must sand composite panels for an extended period. Which respiratory protection is most appropriate?

Accepted Answer

A half-face air-purifying respirator with P100 particulate filters

Answer

Composite dust contains hazardous fibers; a half-face APR with P100 filters provides the highest particulate filtration needed for prolonged exposure.

Question 5

What is the primary purpose of grounding an aircraft before refueling?

Accepted Answer

To equalize static charge between the aircraft and fuel vehicle, preventing spark ignition

Answer

Bonding and grounding dissipate static electricity accumulated during fueling, eliminating ignition sources near flammable vapors.

(AM) Aircraft Maintenance Certification Practice Test

(AM) Aircraft Maintenance Certification Practice Test

AM Safety Procedures & PPE 2