South Carolina Aircraft Structures
Technician Certification License Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. Which of the following materials is most commonly used in aircraft
primary structural components due to its high strength-to-weight
ratio?
A. Steel
B. Aluminum alloy
C. Pure titanium
D. Magnesium
Aluminum alloys are widely used in aircraft structures because they
provide a favorable combination of strength and light weight
compared to other metals.
2. What is the purpose of a nondestructive inspection (NDI) in aircraft
structural maintenance?
A. To test pilot performance
B. To detect flaws without damaging components
C. To calibrate flight instruments
D. To adjust fuel mixture
Nondestructive inspection techniques allow technicians to find
, defects like cracks or corrosion without harming the part being
examined.
3. Which type of fastener is typically used where frequent disassembly
of aircraft structure is required?
A. Blind rivet
B. Bolt and nut assembly
C. Welded joint
D. Adhesive bond
Bolt and nut assemblies are preferred when components must be
removed often for maintenance or inspection.
4. When riveting, what is the primary reason for using a bucking bar?
A. To measure hole diameter
B. To lubricate the rivet
C. To support the rivet tail during forming
D. To mark rivet spacing
A bucking bar provides resistance against the rivet tail so that the
shop head can be formed properly.
5. In aircraft structural repair, what does the term “splice plate” refer
to?
A. A decorative cover
B. A type of weld seam
C. A reinforcing plate used to join two structural members
D. A corrosion preventive compound
Splice plates connect and strengthen two damaged or replaced
structural sections.
6. Which inspection method uses high-frequency sound waves to detect
internal flaws?
A. Visual inspection
B. Liquid penetrant
, C. Eddy current
D. Ultrasonic testing
Ultrasonic testing uses sound waves that reflect off internal
discontinuities, revealing hidden defects.
7. What is the primary hazard associated with magnesium aircraft
components?
A. Excessive corrosion resistance
B. Flammability in chip or dust form
C. Low conductivity
D. Difficulty in machining
Magnesium is highly flammable when in fine particle form, creating
a significant fire hazard during machining.
8. When performing a structural repair, what factor determines the
type and size of fasteners used?
A. Cost of materials
B. Paint type
C. Loads and stresses on the joint
D. Availability of tools
Fastener selection is based on the structural loads and environmental
conditions the joint will experience.
9. What is the purpose of a “shear web” in a wing structure?
A. Fuel distribution
B. Access panel
C. Resisting shear forces between spars
D. Supporting landing gear
Shear webs are vertical or diagonal elements that stabilize wing
spars against shear loads.
10. Which corrosion type forms under paint and is often difficult to
detect visually?
Technician Certification License Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. Which of the following materials is most commonly used in aircraft
primary structural components due to its high strength-to-weight
ratio?
A. Steel
B. Aluminum alloy
C. Pure titanium
D. Magnesium
Aluminum alloys are widely used in aircraft structures because they
provide a favorable combination of strength and light weight
compared to other metals.
2. What is the purpose of a nondestructive inspection (NDI) in aircraft
structural maintenance?
A. To test pilot performance
B. To detect flaws without damaging components
C. To calibrate flight instruments
D. To adjust fuel mixture
Nondestructive inspection techniques allow technicians to find
, defects like cracks or corrosion without harming the part being
examined.
3. Which type of fastener is typically used where frequent disassembly
of aircraft structure is required?
A. Blind rivet
B. Bolt and nut assembly
C. Welded joint
D. Adhesive bond
Bolt and nut assemblies are preferred when components must be
removed often for maintenance or inspection.
4. When riveting, what is the primary reason for using a bucking bar?
A. To measure hole diameter
B. To lubricate the rivet
C. To support the rivet tail during forming
D. To mark rivet spacing
A bucking bar provides resistance against the rivet tail so that the
shop head can be formed properly.
5. In aircraft structural repair, what does the term “splice plate” refer
to?
A. A decorative cover
B. A type of weld seam
C. A reinforcing plate used to join two structural members
D. A corrosion preventive compound
Splice plates connect and strengthen two damaged or replaced
structural sections.
6. Which inspection method uses high-frequency sound waves to detect
internal flaws?
A. Visual inspection
B. Liquid penetrant
, C. Eddy current
D. Ultrasonic testing
Ultrasonic testing uses sound waves that reflect off internal
discontinuities, revealing hidden defects.
7. What is the primary hazard associated with magnesium aircraft
components?
A. Excessive corrosion resistance
B. Flammability in chip or dust form
C. Low conductivity
D. Difficulty in machining
Magnesium is highly flammable when in fine particle form, creating
a significant fire hazard during machining.
8. When performing a structural repair, what factor determines the
type and size of fasteners used?
A. Cost of materials
B. Paint type
C. Loads and stresses on the joint
D. Availability of tools
Fastener selection is based on the structural loads and environmental
conditions the joint will experience.
9. What is the purpose of a “shear web” in a wing structure?
A. Fuel distribution
B. Access panel
C. Resisting shear forces between spars
D. Supporting landing gear
Shear webs are vertical or diagonal elements that stabilize wing
spars against shear loads.
10. Which corrosion type forms under paint and is often difficult to
detect visually?
