Composite and Non-Metallic Materials Quiz

Thermosetting plastics are

• Hardened upon heating and can be reshaped

• Hardened upon heating and cannot be reshaped

• Soften upon heating and can be reshaped

A thermoplastic can be.

• heated and formed only once.

• is not affected by even low temperatures.

• can be reheated and reformed more than once.

Mark the correct statement with respect to storage of acrylic plastic

• When sheets are stored vertically it must be tilted at approximately 18° from vertical

• If stored horizontally, piles should not be over 10 inches high.

• The storage temperature should not exceed 120°F

Due to direct sunlight masking adhesive is dry and hardened then how to remove it.

• Place the sheet in an oven at 250 °F for minimum 1 minute,

• If an oven is not available, remove hardened masking paper by softening the adhesive with aromatic naphtha.

• Sheets treated with aromatic naphtha must be washed immediately with clean water

The three main form of fiber reinforcements are

• Particles, alloys, and fibers

• Particles, whiskers and fiber

• Particles, crystals and fiber

Laminated structure with a core center is called

• Honeycomb structure

• Plastic structure

• Sandwich structure

Most honeycombs are

• Isotropic

• Anisotropic

• Allotropic

An individual fiber is called

• Roving

• Filament

• Splice

Butyl is used with

• Phosphate ester hydraulic fluid(Skydrol)

• Silicon fluid

• Gases, ketones, and acetones

Buna - S is normally used for

• Gasket and seals

• For oil and gasoline hose

• Tires and tubes