AAC Corrosion Prevention and Control 2

Question 1

What is the primary purpose of a corrosion inhibiting compound (CIC) applied to Army aircraft?

Accepted Answer

To provide a protective barrier that displaces moisture and inhibits the corrosion process

Answer

To increase the structural strength of metal components

Answer

To improve aerodynamic performance by smoothing aircraft surfaces

Answer

To identify corroded areas with a color change for inspection purposes

Question 2

What is intergranular corrosion and why is it particularly dangerous for aircraft structural integrity?

Accepted Answer

Corrosion that attacks the grain boundaries within a metal, weakening its structure from within without obvious external signs

Answer

Corrosion that occurs on the outer painted surface of metal components

Answer

Corrosion caused by direct contact between different metal alloys

Answer

Corrosion that develops only in high-temperature turbine engine areas

Question 3

How frequently should Army aircraft be washed to control corrosion accumulation under standard maintenance requirements?

Accepted Answer

At least every 30 days, or more frequently based on environmental exposure

Answer

Once per year during the annual depot inspection

Answer

Only when corrosion is visually detected during preflight inspection

Answer

Every 180 days during phased maintenance cycles

Question 4

Which corrosion severity level indicates that damage exceeds allowable limits and requires depot-level repair or component replacement?

Accepted Answer

Level 3

Answer

Level 1

Answer

Level 2

Answer

Level 4

Question 5

What is the proper technique for removing light surface corrosion from an aluminum aircraft component?

Accepted Answer

Using fine abrasive materials and hand tools, working in the direction of the metal grain

Answer

Using a steel wire brush and chemical paint stripper

Answer

Applying high-pressure water blasting directed at the affected area

Answer

Sandblasting the entire component surface to bare metal

Question 6

What is the purpose of anodizing aluminum aircraft components in Army aviation?

Accepted Answer

To create a hard, corrosion-resistant aluminum oxide layer on the component surface

Answer

To increase the weight-bearing strength and hardness of aluminum structural parts

Answer

To improve electrical conductivity for bonding and grounding purposes

Answer

To prepare aluminum surfaces for welding repair procedures

Question 7

Which metal combination creates the greatest risk of galvanic corrosion when used together in Army aircraft construction?

Accepted Answer

Copper components in contact with magnesium alloy parts

Answer

Aluminum in contact with titanium fasteners

Answer

Steel fasteners in contact with aluminum skin panels

Answer

Stainless steel fittings in contact with titanium tubing