Which of these materials is known for its exceptional strength and resistance to cutting, often leading to increased wear on cutting tools?

Kevlar®

Which of the following tools is primarily used to prevent composite materials from adhering to the working surface during the layup process?

Perforated Release Film

Which of the following materials is applied to the surface of a composite laminate during curing and is later removed to provide a clean surface for bonding?

Peel Ply

 What type of equipment is used to remove air from a vacuum bag, allowing atmospheric pressure to compress and consolidate the composite layers?

Vacuum Pump

 Which flexible material is used to seal the repair area and create a vacuum, allowing for the consolidation of composite layers?

Vacuum Bag

 Which material requires a brush to be applied to dry fibers in the wet layup process?

Resin

 Which of the following tools is used to support composite parts during the curing process and helps ensure a smooth finish on the finished laminate?

Caul Plate

 Which of the following materials is used to absorb excess resin and allow air and volatiles to escape during the curing process?

Bleeder Ply

 What is the primary purpose of vacuum bagging in composite manufacturing?

To apply uniform pressure to the composite material

 How does vacuum bagging work?

By applying a vacuum to remove air from the bag

 What is the typical pressure applied to a composite using vacuum bagging at sea level?

 pounds per square inch

 Which of the following methods can be used in combination with vacuum bagging?

All of the above

 Compared to metallic counterparts, composite structures fabricated using vacuum bagging are typically:

Easier to fabricate

 What is the primary benefit of using filament winding in composite manufacturing?

Lightweight material

 What is a filament winding machine used for?

Winding the reinforcing fibers around a mandrel

 What is the typical method for curing filament wound parts?

Autoclave curing

 Why are repairs on filament wound parts often difficult?

The fibers are continuous and difficult to repair

 What is the major disadvantage of RTM?

The high cost of molds

 What is a one-party system in RTM?

A system that uses a pre-mixed resin and curing agent

 What is the primary advantage of pultrusion over other composite manufacturing methods?

Versatile shapes

 How does pultrusion work?

By pulling fibers through a heated die

 What is the die in pultrusion used for?

To shape the composite part

 Do pultruded parts require vacuum bagging or autoclave curing?

No, for all pultruded parts

 Which of the following is a common application of pultrusion?

Structural profiles

 What is the primary difference between hand lay-up and wet lay-up?

The use of a mold

 What is the typical curing process for hand lay-up parts?

Air drying

 What is the primary advantage of wet lay-up over other composite manufacturing methods?

Low cost

 Which of the following is NOT a common method for curing wet lay-up parts?

Oven curing

 Why is wet lay-up a popular method for home aircraft builders?

It is relatively inexpensive

 Why is wet lay-up a popular method for home aircraft builders?

It is relatively inexpensive

 What is the main problem associated with using different materials for the mold and the part in composite manufacturing?

Different thermal expansion rates

 Why are steel and aluminum molds often used for composite manufacturing despite their CTE problems?

They are stronger

 What is the advantage of using composite tooling with built-in heating elements?

It eliminates the need for an oven

 What is the main disadvantage of building your own composite mold?

Time-consuming process

 Why is it important to make multiple parts from a composite mold to make it cost- effective?

To spread out the cost of the mold

 What is the first step in repairing a damaged composite part using a two-part molding compound?

Remove the damaged area

 Why is it important to clean the damaged area before applying the molding compound?

To ensure a strong bond between the molding compound and the part

 What is the purpose of a backup potting compound when the damage extends through the skin of the composite part?

To provide structural support

 Why is it important to apply a mold release agent to the entire structure before applying the molding compound?

To prevent the molding compound from sticking to the part

 What is the final step in the repair process after bonding the new piece to the existing component?

Sand the repaired area

 Why are repairs on filament wound parts often difficult?

The fibers are continuous and difficult to repair

 Which of the following products are commonly made using filament winding?

Helicopter rotor blades

 What is the primary difference between RTM and other composite manufacturing methods?

The type of resin used

 How does resin transfer molding work?

By injecting resin into a mold containing fabric

 What is the major advantage of RTM over hand lay-up?

Faster production time