-2 chapter 6

Question 1

BATTERY COMPARTMENTS, BOXES, AND

ADJACENT AREAS

Answer 1

Neutralizing solutions are required
prior to cleaning areas contaminated with battery
electrolyte.

Question 2

Neutralizing solutions:

Answer 2

• Sodium Bicarbonate Neutralizing Solution
• Boric Acid Neutralizing Solution
• Monosodium Phosphate Neutralizing Solution

Question 3

AIR INLET DUCTS FOR JET AIRCRAFT

Answer 3

Frequent cleaning
of the ducts is usually sufficient to preclude attack by
corrosion.

Question 4

BERYLLIUM‑COPPER ALLOYS

Answer 4

Berylliumcopper alloys are typically used for high strength
bushing and fittings, and electrical contacts. Surface
discoloration of beryllium copper alloys is normal and
removal is not advised. If removal is required, minimize
the generation of fine beryllium dust particles as much
as possible.

Question 5

CABLES, STEEL

Answer 5

If the surface of a cable is corroded, relieve cable
tension and carefully force the cable open by reverse
twisting. Visually inspect the interior. Corrosion on the
interior strands constitutes failure, and the cable shall
be replaced.

Question 6

DEPLETED URANIUM COUNTERWEIGHTS

Answer 6

If corrosion
occurs, apply a liberal, continuous coat of AMLGUARD
(MIL‑DTL‑85054) and contact the local radiation safety
officer immediately

Question 7

ELECTRICAL AND ELECTRONIC EQUIPMENT

Answer 7

Avionic and electrical equipment are easily damaged
by contamination with corrosion removal debris and
by application of improper corrosion control materials.

Question 8

EMI SEALS AND GASKETS

Answer 8

To prevent
malfunctions caused by electromagnetic interference
(EMI), electrically conductive shielding is either built into
the avionic device or must be added to access panels,
doors, or covers to: 1) prevent emission of EMI from its
own circuits and; 2) prevent susceptibility to outside EMI.
EMI seals and gaskets may also act as environmental
seals in certain locations, especially around doors and
access panels.

Question 9

FASTENERS AND ATTACHING PARTS

Answer 9

Attaching parts, such as nuts, bushings, spacers,
washers, screws, self‑tapping screws, sleeves for
shake‑proof fastener studs, self‑locking nuts, speed
nuts, clamps, and bolts, do not need to be painted
except when dissimilar metal contact is involved with
the materials being joined.

Question 10

FAYING SURFACES, JOINTS, AND SEAMS

Answer 10

When repairs are made on equipment or
accessories, or when components are installed or
structures are reinstalled, the attaching or faying
surfaces shall be protected by sealing all metal-to-metal
contacts and composite-to-metal contacts.

Question 11

HINGES, PIANO TYPE.

Answer 11

Corrosion inhibiting
solid film lubricants are often applied to hinge pins and
nodes to provide lubrication and to reduce corrosion
problems.

Question 12

RELIEF TUBE AREAS

Answer 12

Interior and exterior
relief tube areas shall be inspected and cleaned
after each flight.

Question 13

RUBBER, NATURAL AND SYNTHETIC

Answer 13

Natural and synthetic rubber shall not be painted or
oiled. As a general rule, grease should not be applied
to rubber parts, but some parts, such as “O” rings,
require a grease coating

Question 14

SPRINGS

Answer 14

Springs which are so tightly coiled
that the areas between the coils cannot be plated or
painted for corrosion protection shall be coated with
water displacing corrosion preventive compound
(MIL‑PRF‑81309 Type II) by spraying or dipping, and
allowed to dry for at least one hour.

Question 15

SURFACES AND COMPONENTS EXPOSED
TO EXHAUST GASES, GUN GASES, AND ROCKET
BLAST

Answer 15

Residues from exhaust gases, gun gases,
and rocket blast are very corrosive and can cause
deterioration of paint systems

Question 16

TANKS, POTABLE WATER

Answer 16

The interior
surfaces of aluminum alloy potable water tanks shall
not be painted or conversion coated.