Corrosion

Put the steps for cleaning preparation in the correct sequence.

1.Apply pre-wash lubrication. 2.Inspect for water or cleaning compound intrusion.3.Cover vents, openings, and ports.

Put the steps for performing a general inspection of aviation equipment in the correct sequence.

1.Clean the area thoroughly. 2.Examine the area. 3.Remove corrosion.

Put the steps for performing an evaluation of corrosion damage in the correct sequence.

1.Determine if corrosion is in an area that has been previously reworked. 2. Measure the damage. 3.Use a straight edge and a 10X magnifying glass to inspect the area suspected of being previously reworked. 4.Evaluate the depth of the previous rework.

Highly alkaline cleaning compounds, with a pH greater than _____, are not authorized for Navy aircraft.

10

When evaluating corrosion damage, a straight edge and what type of magnifying glass may be used to assist in determining if an area has previously been reworked?

10X

An increase of how much temperature above 75° Fahrenheit is necessary to cut the application time by approximately half?

18°

Paint equipment shall be thoroughly cleaned immediately after use or at least every how many hours?

2

Daily cleaning or wipe down is required on all exposed, unpainted surfaces when deployed within how many miles of salt water and when flown below 3000 feet over salt water?

3

The proper pressure for the air regulator when operating the portable 45 gallon foam generating cleaning unit is between _____ psi.

30-70

During scheduled or unscheduled maintenance actions on aviation equipment or components, the area involved as well as those within what distance of the repair or treatment area must be visually inspected for corrosion?

36 inches

In general, store paint materials between _____ and 100 degrees Fahrenheit?

40

Routine scheduled cleaning should not be performed at temperatures below how many degrees Fahrenheit?

40

The application life of a sealant is the length of time that a mixed sealing compound remains usable at 75° Fahrenheit and how much relative humidity?

50%

If during a test of paint material the material dries properly, the shelf life may be extended for how long?

6 months

How long may it take to achieve a full cure for sealing compounds?

7 days

Which of the following best represents the mixture ratio of isopropyl alcohol and distilled water used to clean battery compartments?

70% Alcohol, 30% Water

What should you always use on bare cadmium plating to prevent corrosion?

A paint system

Where should mixing of a chemical prepaint treatment be done, so as to avoid breathing toxic vapors?

A well ventilated area

With respect to depleted uranium counterweights, if corrosion occurs, what should you apply to prevent further corrosion?

AMLGUARD

Which of these is true concerning surface preparation?

Abrasion of substrate materials during surface preparation can damage structural integrity.

Which paint removal would you use for areas of several square inches or less?

Abrasive mat

Sealants are used on battery compartments and relief tanks for which of the following reasons?

Acid resistance

How often should interior and exterior relief tube areas be inspected and cleaned?

After each flight

Under emergency conditions, who is responsible for minimizing damage?

All hands

Who is responsible for an effective preventive maintenance program?

All maintenance personnel

Which of the following is the primary reason aircraft should be cleaned regularly?

Allow for a thorough inspection

Brushes and rollers are _____ for touch-up painting.

Alternatives

What should you use to prepare the surface of water sensitive areas?

Approved cleaning solvent

Which style of semkit holds proportioned amounts of the two components separated by an aluminum barrier?

Barrier style

If your wash rack is a source of hazardous waste, which of the following should you contact to determine corrective action?

Base safety

Corrosion in faying surfaces, seams, and joints is usually detectable by which of the following?

Bulging on the skin surface

How should unevenly etched faying surface joints or fasteners and sharply protruding objects or corners be scuff sanded?

By hand

Chemical prepaint treatments are also known as which of the following?

Chemical films

All removable structures shall be installed at the faying surfaces with which type of sealant?

Class B

The prevention and control of corrosion on aircraft is whose responsibility?

Command

Paint removal by scuff sanding must not go beyond the primer coat, since complete removal of the paint can damage fibers in the surface layers of which of the following?

Composite materials

The primary purpose of any paint system is the protection against which of the following and other forms of deterioration?

Corrosion

Which of the following is used to protect metal aircraft parts and components by preventing corrosive materials from contacting and corroding bare metal surfaces?

Corrosion preventive compound

RTV silicone adhesive/sealants conforming to MIL-A-46106 emit acetic acid and, therefore, are which of the following?

Corrosive

What is the health hazard while breathing the vapors from organic solvents?

Dangerous

The preferred method is _____________ when fresh water is available for rinsing purposes.

Detergent cleaning

What should you do with the sealant kit if the working time is not suitable for the intended purpose?

Dispose of the kit.

Which of the following is true of using paint equipment?

Do not allow water to remain in the equipment.

To prevent malfunctions caused by EMI, what must be either built into the avionic device or added to access panels and doors?

Electrically conductive shielding

When applying sealants, what should you not allow to happen to the solvent, because it will allow some or all of the oil and dirt to redeposit, making it impossible to be removed with a dry cloth?

Evaporate

MIL-PRF-85570, Type IV is recommended for cleaning which of the following?

Exhaust tracks and gun blast deposits

All permanent structures shall be installed with MIL-PRF-81733 sealant at which of the following surfaces?

Faying

Due to the irregularities in composite surfaces, complete removal of the paint can damage which of the following in the surface layers?

Fibers

Which method should be used for applying corrosion preventive compound to interior surfaces of tubing closed by welded end plugs or components?

Fill and drain method

FED-STD-595 (color fandeck) provides a list of paint colors represented in five digit numbers. Match the description to the number which represents that description.

First digit: Gloss value Second digit: Color Remaining three digits: Color value or hue

What should you do if chemical prepaint treatments accidentally contact the skin or eyes?

Flush immediately with plenty of clean water.

Which of the following would be considered an operational use for painting?

For camouflage

Which of the following is essential to the overall corrosion control program?

Frequent corrosion inspections

Before starting emergency treatment, it is imperative that which of the following supervise purging or inerting procedures and certify that the aircraft is fire and explosion safe?

Gas Free Engineer (GFE)

Which of the following can be used to apply lubricants?

Grease gun, lever type

All aircraft shall be _____ during all painting procedures in order to guard against the danger of fire from static electricity.

Grounded

All rivets shall be installed wet with MIL-PRF-81733 sealant, except those located where?

In fuel contact areas

Which of the following is a part of a disciplined preventive maintenance program?

Keeping low-point drains open

Where is the source for water intrusion found on cases and covers?

Lead-in attachment points

What are the categories used for reporting degrees of corrosion? (Select all that apply.)

Light,moderate,severe

Electrostatic painting is useful for painting small areas and produces _____ overspray with _____ transfer efficiency.

Little, high

Which of the following factors may require more drying time for chemical conversion coatings?

Low temperature

Which of the following generally consists of one component, which cures by reacting with moisture in the air?

MIL-A-46146

Which compound is used to prevent corrosion on pin and/or pin receptacle end of connectors?

MIL-C-81309

Which of the following is a water displacing corrosion preventive compound which forms a clear, dry, flexible film?

MIL-C-85054

Which type of lubricant prevents galvanic corrosion coupling on close tolerance fittings and reduces fretting?

MIL-L-46010

When applying lubricants through pressure type fittings with a grease gun, clean grease fitting with which of the following and a cleaning cloth before applying lubricant?

MIL-PRF-680, Class C

When performing the post-cleaning procedures, which of the following is used to remove all tape adhesive residues?

MIL-PRF-680, Type II

Which of the following should be used prior to lubricating any components or parts to remove any foreign matter from joints, fittings, and bearing surfaces?

Non-woven cleaning cloth

As a general rule, grease shall not be applied to rubber parts, but some parts require a grease coating. Which of the following is one of those parts?

O rings

What is the maximum depth that light corrosion is discolored and pitted?

One mil (0.001 inch)

For how much of its original shelf life can a batch of sealant be extended if it achieves approximately the same hardness as sealant from kits that are not over aged?

One-half

Under which conditions should you apply corrosion preventive compounds?

Operations will not permit the use of the corrosion treatment methods.

Which type of hinges are especially vulnerable to corrosion?

Piano

Which kind of sealant smoothing tools may be manufactured as needed to fit a specific situation?

Plastic

Match the scraper to the metals it is used for removing corrosion.

Plastic scrapers are used on any metal surfaces, aluminum scrapers are used on aluminum and magnesium surfaces, and steel scrapers are used on steel surfaces.

Components that are removed from the aircraft are tagged for identification purposes. When tagging components, make sure to indicate which of the following?

Preservation method

What is the main purpose of emergency preparations?

Prevent further damage.

The epoxy paint system consists of which of the following and a compatible topcoat?

Primer

Which of these is a true statement concerning priority removal?

Priority removal shall always be oriented toward salvageable equipment.

Chromic acid (Form II powder) is a strong oxidizer and may ignite on contact with organic materials and which of the following?

Reducing agents

Failure to remove all the corrosion may allow the corrosion to continue after affected surfaces are which of the following?

Refinished

The first step when operating the portable 15 gallon foam generating cleaning unit is to do which of the following?

Release the pressure.

Which of the following is the first step in the post-cleaning procedures?

Remove covers and masking tape.

If the surface of a steel cable is corroded, how should you relieve cable tension and force the cable open to inspect it?

Reverse twisting

What should you not do to depleted uranium under any circumstances?

Sand

Aircraft wash rack cleaning waste shall receive the equivalent of what type of sewage treatment?

Secondary

Which of the following is an example of a fairing or smoothing tool for working sealants and adhesives into seams?

Spatula

Which of the following requires approximately 14 cfm of air at 50 psi to siphon solvent or cleaner from a container?

Spray cleaning gun

Which type of brush should you use to clean around bolts, rivets, or other hard to reach areas?

Stiff bristle

What does fluorescent penetrant inspection detect?

Stress corrosion cracking

MIL-PRF-81352, Type I, acrylic lacquer coating can be used for application of/on which of the following where environmental regulations permit?

Temporary markings

Why should care be taken when using rivet nozzles?

To prevent sealant material from filling fastener holes

What is the primary purpose of sealants?

To prevent the intrusion of moisture

With how many coats of epoxy primer should electrical conduit (exterior) and junction boxes (interior and exterior) be coated to electrically insulate them?

Two

Which of the following must be operated in the horizontal position?

Universal washer unit

With what must the prepared surface be cleaned if it is allowed to become dirty or is scratched?

Wet abrasive mat

Which of the following sealants is non-toxic?

ePTFE sealing tapes