AEROSPACE MATERIALS EXAMS SCRIPT 2026/2027
QUESTIONS AND SOLUTIONS RATED A+
✔✔A non-structural part attached to a truss structure to streamline the shape. This
piece is oriented perpendicular to the longitudinal axis. - ✔✔Former
✔✔What type of aircraft construction did the Wright "R" of 1910 use? - ✔✔Truss or Box-
Type structure
✔✔An internal force that resists deformation of a body caused by the imposition of an
external load. - ✔✔Stress
✔✔The property of a solid body whereby it undergoes a permanent change in shape
when the yield point is exceeded. - ✔✔Plasticity
✔✔This type of stress is applied to a body when it is twisted. The stresses set up by the
force applied are actually shear stresses caused by a combination of internal tension
and compression. When a body is twisted, tension is created which operates diagonally
across the body. At right angles to the tension stress is a comprehensive stress. The
combination of these two stresses is known as this type of stress. - ✔✔Torsion
✔✔This term is used to describe the point where material becomes permanently
deformed. When a material is stressed beyond this point, the elastic limit has been
exceeded and it will no longer return to its original shape. - ✔✔Yield Point
✔✔This term is used to the describe the most stress that can be applied to a member
before it will fracture or break - ✔✔Ultimate Strength
✔✔The property of a material to fracture without changing shape. - ✔✔Brittleness
✔✔The property of a material to resist abrasion, penetration, or permanent deformation.
- ✔✔Hardness
✔✔The property of a material that allows it to be hammered, rolled or pressed into
various shapes without detrimental effects on its strength or other desirable properties. -
✔✔Malleability
✔✔The property of a material that allows it to be permanently drawn bent or twisted into
various shapes. - ✔✔Ductility
✔✔This law states the degree of stress deformation (strain) is directly proportional to
the stress as long as the elastic limit is not exceeded. - ✔✔Hooke's Law
, ✔✔To cause mechanical deformation in (a body or structure) as the result of stress.
This is simply stress deformation. - ✔✔Strain
✔✔This strength quantifies a material's ability to resist elongation. This is an important
consideration where fasteners such as rivets are employed. The shear strength of the
rivet should be slightly lower than this strength of the material being fastened in order to
prevent elongation of the hole. - ✔✔Bearing Strength
✔✔This type of stress occurs when the force per unit area tries to stretch a structural
member. Some structural member are designed to withstand this type of stress only.
One example of this is a control cable, which withstands this type of stress very well but
no resistance to a compression load. This is the opposite of compression. - ✔✔Tension
✔✔This type of stress is the opposite of tension. This stress reduces the size or volume
of an object by the application of pressure. This type of stress tends tends to shorten or
crush a structural member - ✔✔Compression
✔✔This type of stress results in a deformation within a body in which two adjacent
planes tend to move in opposite directions to each other while remaining parallel. An
example of this type of stress is the stress typically exerted on a rivet fastening two
pieces of skin together . - ✔✔Shear
✔✔This type of stress is sometimes called beam stress and is actually a combination of
tension and compression. The wing of an airplane in flight experiences this type of
stress in an upward direction in flight. This upper surface of the wing spar is subject to
compression while the lower surface is subject to tension. Upon landing, this type of
stress on the wing is in a downward direction. After landing, the load on the wing
reverses and the upper surface of the wing spar is subject to tension while the lower
surface is subject to compression. - ✔✔Bending
✔✔It is common practice to size the machines, so that the maximum design strength is
below the yield strength by an appropriate factor. This is sometimes refereed to as the
factor of safety. This value is used to provide a design margin over the theoretical
design capacity to allow for uncertainty in the design process or bad handling during
aircraft operation. The factor used is determined by the conditions over which the
designer has no control and accounts for the uncertainties involved in the design and
manufacturing process and vehicle operation after manufacturing. - ✔✔Safety Factor
✔✔In the late 1920's, John Northrop designed the Lockheed Vega, which became one
of the most successful planes of the era. What was the major design innovation that
was incorporated in the aircraft that led to its exceptional.
a. Composite construction
b. stressed skin construction
c. Truss Type construction - ✔✔Stressed Skin Construction
QUESTIONS AND SOLUTIONS RATED A+
✔✔A non-structural part attached to a truss structure to streamline the shape. This
piece is oriented perpendicular to the longitudinal axis. - ✔✔Former
✔✔What type of aircraft construction did the Wright "R" of 1910 use? - ✔✔Truss or Box-
Type structure
✔✔An internal force that resists deformation of a body caused by the imposition of an
external load. - ✔✔Stress
✔✔The property of a solid body whereby it undergoes a permanent change in shape
when the yield point is exceeded. - ✔✔Plasticity
✔✔This type of stress is applied to a body when it is twisted. The stresses set up by the
force applied are actually shear stresses caused by a combination of internal tension
and compression. When a body is twisted, tension is created which operates diagonally
across the body. At right angles to the tension stress is a comprehensive stress. The
combination of these two stresses is known as this type of stress. - ✔✔Torsion
✔✔This term is used to describe the point where material becomes permanently
deformed. When a material is stressed beyond this point, the elastic limit has been
exceeded and it will no longer return to its original shape. - ✔✔Yield Point
✔✔This term is used to the describe the most stress that can be applied to a member
before it will fracture or break - ✔✔Ultimate Strength
✔✔The property of a material to fracture without changing shape. - ✔✔Brittleness
✔✔The property of a material to resist abrasion, penetration, or permanent deformation.
- ✔✔Hardness
✔✔The property of a material that allows it to be hammered, rolled or pressed into
various shapes without detrimental effects on its strength or other desirable properties. -
✔✔Malleability
✔✔The property of a material that allows it to be permanently drawn bent or twisted into
various shapes. - ✔✔Ductility
✔✔This law states the degree of stress deformation (strain) is directly proportional to
the stress as long as the elastic limit is not exceeded. - ✔✔Hooke's Law
, ✔✔To cause mechanical deformation in (a body or structure) as the result of stress.
This is simply stress deformation. - ✔✔Strain
✔✔This strength quantifies a material's ability to resist elongation. This is an important
consideration where fasteners such as rivets are employed. The shear strength of the
rivet should be slightly lower than this strength of the material being fastened in order to
prevent elongation of the hole. - ✔✔Bearing Strength
✔✔This type of stress occurs when the force per unit area tries to stretch a structural
member. Some structural member are designed to withstand this type of stress only.
One example of this is a control cable, which withstands this type of stress very well but
no resistance to a compression load. This is the opposite of compression. - ✔✔Tension
✔✔This type of stress is the opposite of tension. This stress reduces the size or volume
of an object by the application of pressure. This type of stress tends tends to shorten or
crush a structural member - ✔✔Compression
✔✔This type of stress results in a deformation within a body in which two adjacent
planes tend to move in opposite directions to each other while remaining parallel. An
example of this type of stress is the stress typically exerted on a rivet fastening two
pieces of skin together . - ✔✔Shear
✔✔This type of stress is sometimes called beam stress and is actually a combination of
tension and compression. The wing of an airplane in flight experiences this type of
stress in an upward direction in flight. This upper surface of the wing spar is subject to
compression while the lower surface is subject to tension. Upon landing, this type of
stress on the wing is in a downward direction. After landing, the load on the wing
reverses and the upper surface of the wing spar is subject to tension while the lower
surface is subject to compression. - ✔✔Bending
✔✔It is common practice to size the machines, so that the maximum design strength is
below the yield strength by an appropriate factor. This is sometimes refereed to as the
factor of safety. This value is used to provide a design margin over the theoretical
design capacity to allow for uncertainty in the design process or bad handling during
aircraft operation. The factor used is determined by the conditions over which the
designer has no control and accounts for the uncertainties involved in the design and
manufacturing process and vehicle operation after manufacturing. - ✔✔Safety Factor
✔✔In the late 1920's, John Northrop designed the Lockheed Vega, which became one
of the most successful planes of the era. What was the major design innovation that
was incorporated in the aircraft that led to its exceptional.
a. Composite construction
b. stressed skin construction
c. Truss Type construction - ✔✔Stressed Skin Construction
