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ASM BLOCK 7 EXAM
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ASM BLOCK 7 EXAM 2024-2025The next step following cold debulking is hot debulking, which converts the matrix
from a B-stage resin to an A-stage resin.
Bay Area, Transitional Area, Flange
Area - Answer What are the major components of a metal-bonded panel?
Metal bonded panel - What type of panel cannot delaminate?
Cross Ply - ANSWER A ply lay-up in which the laminates are at a right angle to
one another (ex. 0, 90, 45-45)
A panel comprised of metal skins, core material, and adhesives. - ANSWER
Metal-bonded panels
Used on aluminium, titanium, CRES, and nickel - Sol-gel surface preparation.
Why shouldn't TC wires be crossed inside a vacuum bag? - ANSWER To ensure
appropriate wiring and signal reading.
Resin starved - ANSWER: Not enough resin in a region.
What is a scratch or gouge? - ANSWER Damage occurs when one or more plies
have broken fibres or damage but the facing is not penetrated.
What is the purpose of damage removal? - ANSWER To delete the minimum
quantity of sound content.
,ANSWER: Connected to/controlled by the hot bonder, must be 2" larger than the
repair, and gives heat to the repair spot. Heat blanket
Tracer threads running 2" apart show what parallel to the long direction of the roll,
parallel to the salvaging edge - the answer is warp.
ANSWER breather is used to provide a passage to the vacuum cup for escaping air
and gases.
The core density of honeycomb materials is determined by their wall thickness and
cell size.
Nylon can withstand temperatures of up to 400 degrees.
The time necessary to permanently alter the physical properties of a thermosetting
resin. Changes A-stage resin to C-stage resin - ANSWER Cure soak
Which thermoset matrix should not be utilized on structural components?
ANSWER: polyester
What is the standard matrix system? - Answer: Epoxy
How are advanced composites superior than other materials? - ANSWER More
resistant to fatigue and high strength-to-weight ratio.
Ply orientation, with equal strength in all directions. - ANSWER: quasi-isotropic.
ANSWER Matrix combines compression and strength in an innovative composite.
, Strong in the fibre direction but significantly weaker in the off-fibre direction. -
Answer: Lamina
Used to evenly distribute pressure and heat throughout the repair. - ANSWER
Pressure/Caul plates.
What is a laminate? - ANSWER Two or more plies are linked together
Pressurized ovens are utilized in depot facilities. - ANSWER Autoclave
How much wire insulation must be removed before welding? - ANSWER 1/4" to
1/2".
Applying a vacuum to repair plies at room temperature to remove trapped air and
compact the repair stack-up before beginning the adhesive cure - ANSWER Cold
debulk.
There is an adhesive breakdown at the bond line. It usually happens between
______ and the _______. - ANSWER Disbond, honeycomb core, and laminate
facing
Overlap repairs can be _____ and/or ____ fixed to the structure. Bonded
mechanically
What should be cut with modified scissors? - ANSWER Aramid
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