7.18 Inspection & Repair Techniques

Question 1

What does ‘damage’ refer to in the Structure Repair Manual (SRM)?
A) A temporary change in shape
B) A cross-sectional area or permanent distortion of a structural member
C) A defect caused by corrosion

Answer 1

B) A cross-sectional area or permanent distortion of a structural member

Question 2

What is a ‘defect’ in the context of the Structure Repair Manual (SRM)?
A) A minor crack in the structure
B) Any event or condition which reduces the serviceability of the aircraft
C) A minor dent with no impact on performance

Answer 2

B) Any event or condition which reduces the serviceability of the aircraft

Question 3

What is a ‘gouge’ according to the Structure Repair Manual (SRM)?
A) A damaged area where the result is a cross-sectional change caused by a sharp object
B) A surface crack with no change in shape
C) A small dent with no significant structural effect

Answer 3

A) A damaged area where the result is a cross-sectional change caused by a sharp object

Question 4

What is the classification for damage that is within acceptable limits?
A) Non-Allowable Damage
B) Allowable Damage
C) Non-Repairable Damage

Answer 4

B) Allowable Damage

Question 5

What classification is given to damage that requires a repair?
A) Allowable Damage
B) Non-Allowable Damage
C) Non-Repairable Damage

Answer 5

B) Non-Allowable Damage

Question 6

What classification is given to damage that requires replacement instead of repair?
A) Allowable Damage
B) Non-Allowable Damage
C) Non-Repairable Damage

Answer 6

C) Non-Repairable Damage

Question 7

What magnification is typically used for viewing inside structures during inspection?

A) 8x
B) 10x
C) 20x

Answer 7

A) 8x

Question 8

Which magnification is required to confirm a defect during inspection?

A) 8x
B) 10x
C) 20x

Answer 8

B) 10x

Question 9

What magnification level is used for a stereoscopic magnifying glass?

A) 8x
B) 10x
C) 20x

Answer 9

C) 20x

Question 10

What are common indicators of corrosion on a painted surface during visual inspection?

A) Scaly or blistered surface, change of color, blisters in the paint
B) Cracks and peeling paint
C) Dents and scratches

Answer 10

A) Scaly or blistered surface, change of color, blisters in the paint

Question 11

What signs indicate corrosion on a metallic surface during visual inspection?

A) Pitted surface, dull or darkened area, white, grey, or red dust
B) Shiny surface with clean edges
C) Scratches and chips

Answer 11

A) Pitted surface, dull or darkened area, white, grey, or red dust

Question 12

What is abrasion by hand best suited for during corrosion removal?

A) Removing heavy corrosion
B) Removing light corrosion
C) Polishing surfaces

Answer 12

B) Removing light corrosion

Question 13

When is wire brushing used in corrosion removal?

A) To remove light corrosion from aluminum parts
B) To remove heavy corrosion, especially on steel components
C) To prepare painted surfaces for inspection

Answer 13

B) To remove heavy corrosion, especially on steel components

Question 14

Why should wire brushing not be used on aluminum aircraft parts?

A) It creates scratches that cannot be repaired
B) It risks damaging the aluminum surface
C) It leaves steel debris that can cause further corrosion

Answer 14

B) It risks damaging the aluminum surface

Question 15

Why should hot temperatures be avoided during grinding?

A) It can damage tools
B) It can change the mechanical properties of the material
C) It slows down the grinding process

Answer 15

B) It can change the mechanical properties of the material

Question 16

What is abrasive blasting best suited for?

A) Removing filiform corrosion quickly
B) Smoothing surfaces for painting
C) Removing heavy corrosion from steel parts

Answer 16

A) Removing filiform corrosion quickly

Question 17

Why should abrasive blasting be used externally?

A) To avoid generating excessive dust
B) To prevent FOD from being created
C) To ensure better lighting for inspection

Answer 17

B) To prevent FOD from being created

Question 18

What tool should be used to inspect areas after abrasive blasting?

A) A magnifying glass with 10x magnification
B) A magnifying glass with 20x magnification
C) A stereoscopic microscope

Answer 18

A) A magnifying glass with 10x magnification

Question 19

What must be done to any defective fasteners?

A) They should be coated with anti-corrosion treatment
B) They should be removed entirely
C) They should be tightened to proper torque specifications

Answer 19

B) They should be removed entirely

Question 20

What is the most common type of corrosion found on carbon steel?

A) Black pitting
B) Rust (ferrous oxide)
C) Salt deposits

Answer 20

B) Rust (ferrous oxide)

Question 21

How does corrosion on stainless steel and nickel chromium alloys typically appear?

A) As red rust
B) As black pitting
C) As white oxide

Answer 21

B) As black pitting

Question 22

What causes corrosion on titanium alloys, and how is it identified?

A) Exposure to air, identified by red rust
B) Salt deposits and metal impurities, identified as black or white oxide
C) High temperatures, identified by cracks in the material

Answer 22

B) Salt deposits and metal impurities, identified as black or white oxide

Question 23

What does “CAA” stand for, and what is it used for?

A) Chemical Acid Application
B) Chromic Acid Anodising
C) Conversion Acid Anodising

Answer 23

B) Chromic Acid Anodising

Question 24

What does ELOXAL stand for, and what acid does it use as an electrolyte?

A) Electric oxidise aluminium; sulphuric acid
B) Electrolytic oxidation aluminium; chromic acid
C) Electrical oxide aluminium; nitric acid

Answer 24

A) Electric oxidise aluminium; sulphuric acid

Question 25

What does "CCC" refer to in surface treatments? A) Chromic Conversion Coating B) Chemical Conversion Coating C) Chemical Corrosion Control

Answer 25

B) Chemical Conversion Coating

Question 26

What does "SAA" stand for, and what acid is used? A) Sulphuric Acid Anodising; sulphuric acid B) Surface Aluminium Anodising; chromic acid C) Sulphur Acid Aluminium; sulphuric acid

Answer 26

A) Sulphuric Acid Anodising; sulphuric acid

Question 27

How many layers are in the Airbus paint system? A) 1 layer B) 2 layers C) 3 layers

Answer 27

C) 3 layers

Question 28

How many layers of paint does Boeing typically use for the cabin and fuselage outer skin? a) 1 layer b) 3 layers c) 2 layers

Answer 28

c) 2 layers

Question 29

What are the types of surface protection repairs? A) Fixing, polishing, buffing B) Fixing, partial or total renewal, basic renewable C) Patching, sanding, layering

Answer 29

B) Fixing, partial or total renewal, basic renewable

Question 30

What does basic renewable paint finishing involve when dealing with heavily aged paint finishes with cracks? a) Complete removal of the old paint b) Applying a new layer of paint over the cracks c) Only sanding the surface without removing the paint

Answer 30

a) Complete removal of the old paint

Question 31

What should electrically conductive paints not be applied to? a) Antennae covers b) Aircraft wings c) Engine parts

Answer 31

a) Antennae covers

Question 32

What is the most commonly encountered water-displacing inhibitor manufacturer? a) Dinitrol b) 3M c) Loctite

Answer 32

a) Dinitrol

Question 33

What must be covered with electrically conductive paint on composite components? a) 75% of all countersinks b) 50% of all countersinks c) 100% of all countersinks

Answer 33

a) 75% of all countersinks

Question 34

What is sealing? a) A process that confines liquids and gases within a given area or prevents them from entering areas from which they must be excluded b) A process that allows liquids and gases to escape freely c) A process to remove moisture from an area

Answer 34

a) A process that confines liquids and gases within a given area or prevents them from entering areas from which they must be excluded

Question 35

What do seals protect against in acid areas? a) Battery acid attack b) UV radiation c) Corrosion from saltwater

Answer 35

a) Battery acid attack

Question 36

What colours are silicone compounds typically available in? a) White, red, grey b) Blue, green, yellow c) Black, white, brown

Answer 36

a) White, red, grey

Question 37

Where are silicone compounds used? a) Where heat resistance is required b) Where low temperature resistance is needed c) Where flexibility is important

Answer 37

a) Where heat resistance is required

Question 38

What colour can non-silicone compounds be? a) Any colour b) Red and green c) Only black and white

Answer 38

a) Any colour

Question 39

What is the "tack-free time" for sealants? a) The time required for the sealant to cure sufficiently so it won't transfer to the finger after thawing (for one-part silicones) b) The time it takes for the sealant to dry completely c) The time it takes for the sealant to become fully hardened

Answer 39

a) The time required for the sealant to cure sufficiently so it won't transfer to the finger after thawing (for one-part silicones)

Question 40

Which sealing method is applied with a brush? a) Class A b) Class B c) Class C

Answer 40

a) Class A

Question 41

What is the purpose of a Class B seal? a) To prevent leaks at the edges of structural joints b) To apply to one faying surface with a roller c) To be sprayable

Answer 41

a) To prevent leaks at the edges of structural joints

Question 42

What is the sealing method for a fraying surface seal (Class C)? a) Applied with a roller to one faying surface b) Applied with a brush c) Sprayable

Answer 42

a) Applied with a roller to one faying surface

Question 43

Which classes of seals are sprayable? a) Class E & F b) Class A & B c) Class B & C

Answer 43

a) Class E & F

Question 44

What type of sealing system is used for integral fuel tank sealing? a) 2-phase system b) 3-phase system c) 4-phase system

Answer 44

b) 3-phase system

Question 45

How many Class A and Class B seals are involved in the integral fuel tank sealing system? a) 1x Class A, 1x Class B b) 1x Class A, 2x Class B c) 2x Class A, 1x Class B

Answer 45

b) 1x Class A, 2x Class B

Question 46

What are the 4 levels of sealant? a) Basic, Extensive, Intermediate, Limited b) Absolute, Extensive, Intermediate, Limited c) Absolute, Standard, Extensive, Limited

Answer 46

b) Absolute, Extensive, Intermediate, Limited

Question 47

What type of freezers should be used for sealing materials? a) Chemical freezers b) Mechanical freezers c) Cryogenic freezers

Answer 47

b) Mechanical freezers

Question 48

What tools should be used for silicone sealant? a) Any general-purpose tools b) Tools used only for silicone sealants c) Tools used for any type of material

Answer 48

b) Tools used only for silicone sealants

Question 49

What should cutting tools for silicone sealants be made of? a) Plastic or rubber b) Hardwood or metal no harder than 2024-T3 aluminium c) Stainless steel

Answer 49

b) Hardwood or metal no harder than 2024-T3 aluminium