HCCT 300 PRELIM PERIODICAL
EXAMINATION
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Option 1
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01. A single grouping of filament or fiber ends known as. *
1 point
b. Filament
a. Roving
c. Fibers
d. Ply orientation
02. Type of fiber which have a very stiff and have a high tensile and compressive
strength. *
1 point
b. Graphite fiber
a. Carbon fiber
d. Kevlar
c. Boron
Type of fiber which have 3 to 10 times stiffer than glass fibers. *
1 point
b. Caron
d. Boron
a. Kevlar
c. Graphite
04. Type of fiber glass used for electrical application. *
1 point
c. Boron
a. S-glass
d. Hybrid composite
b. E-glass
05. The strength and stiffness of a composite buildup depends on. *
1 point
d. Resin matrix.
b. characteristics of the fiber
a. Types of fibers
c. Orientation sequence of the plies
06. What makes a composite material stiff and strong? *
1 point
b. Resin matrix
a. Direction of the fibers
c. Types of fibers
d. Types of core materials
07. A material that has uniform properties in all directions known as *
1 point
a. Anisotropic structure
d. Sandwich structure
c. Limited structure
b. Isotropic structure
08. What is the purpose of ±45° ply orientation? *
1 point
b. Shear loads
a. Axial load
d. Both A and C
c. Side load
09. Used to describe direction of fibers on a diagram, spec sheet, or manufacturer’s
sheets *
1 point
a. Roving
d. Ply orientation
c. Wrap clock
b. Filament
10. What type of resin impregnated for unidirectional prepreg tapes? *
1 point
c. Polyester resin
b. Thermosetting resins
a. Polyimides
d. Vinyl Ester Resin
11. Type of resin excel in high-temperature environments where their thermal
resistance, oxidative stability, low coefficient of thermal expansion. *
1 point
b. Polyester resin
d. Phenolic Resin
c. Vinyl Ester Resin
a. Polyimide’s resin
12. What type of resin used for aero engines and high temperature components? *
1 point
b. Bismaleimides (BMI)
d. Polyimides
a. Thermosetting resins
c. Vinyl Ester Resin
13. What stage that the resin is fully cured? *
1 point
b. B stage
d. D stage
c. C stage
a. A stage
14. What is the prescribe temperature curing Polyimide’s resin? *
1 point
d. 800 °F (290 °C).
c. 750 °F (290 °C).
a. 550 °F (290 °C).
b. 650 °F (290 °C).
15. What is the major disadvantages of epoxy resin? *
1 point
b. Curing process
d. Low bonding quality
a. Weight
c. Brittleness
16. What type of fiber used to repair cracked aluminum aircraft skins? *
1 point
a. S-glass
c. Boron
d. Aramid
b. E-glass
17. What type of matrix materials known as PEEK, is a high temperature thermoplastic?
*
1 point
d. Polyester Resins
a. Polyether Ether Ketone
c. Polybenzimidazoles (PBI)
b. Bismaleimides (BMI)
18. What type of adhesive used as an alternative to film adhesive? *
1 point
a. Foaming Adhesives
b. Paste Adhesives
c. Film Adhesives
d. Liquid Adhesives
19. What type of core material which have a best strength-to-weight ratio and energy
absorption? *
1 point
c. Kraft paper
a. Aramid paper
d. Aluminum
b. Ceramics
20. What type of core material used for homebuilt and lighter aircraft? *
1 point
b. Foam core
d. Aluminum honeycomb
a. Nomex honeycomb
c. Balsa wood
21. What type of foam core material which have very good fire-resistant properties and
can have very low density, but relatively low mechanical properties? *
1 point
d. Polymethacrylimide (Rohacell)
c. Polypropylene
a. Polyurethane
b. Phenolic
22. An interface between the layers in the laminate. *
1 point
d. Erosion
a. Delamination
b. Corrosion
c. Debonding
23. What is the purpose of 90° ply orientation? *
1 point
b. Shear loads
c. Side loads
d. Both a and b
a. Axial loads
24. Type of aircraft which have 50 percent composite structure. *
1 point
a. B767
b. B787
c. A380
d. A320
25. What is the primary load carrying element of the composite material?
1 point
a. Resin matrix
b. Ply sequence
c. Laminae
d. Fiber
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