Mach Design UPDATED ACTUAL Questions and CORRECT Answers
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Mach Design
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Mach Design
Mach Design UPDATED ACTUAL
Questions and CORRECT Answers
yield strength - CORRECT ANSWER- the stress for a specified deviation fron the
straight part of the stress-strain curve.
Strain - CORRECT ANSWER- it is the deformation per unit gauge length
Ultimate stress - CORRECT ANSWER- the highest...
Mach Design UPDATED ACTUAL
Questions and CORRECT Answers
yield strength - CORRECT ANSWER✔✔- the stress for a specified deviation fron the
straight part of the stress-strain curve.
Strain - CORRECT ANSWER✔✔- it is the deformation per unit gauge length
Ultimate stress - CORRECT ANSWER✔✔- the highest point on the stress-strain curve... is
the max load divided by the original area before straining occurs
0.2%(0.002in/in) - CORRECT ANSWER✔✔- it is amount of offset for steel, Al, and
magnesium
Elastic limit - CORRECT ANSWER✔✔- the max stress to which a standardized test
specimen may be subjected without permanent deformation
Proportional limit - CORRECT ANSWER✔✔- the stress at which the stress-strain curve
deviates
modulus of elasticity - CORRECT ANSWER✔✔- the stress is proportional to strain below
the proportional limit
stiffness - CORRECT ANSWER✔✔- a measure of modulus of elasticity
torque - CORRECT ANSWER✔✔- the twisting moment
polar section modulus - CORRECT ANSWER✔✔- distance from the neutral axis to the
point where the stress is desired
factor of safety - CORRECT ANSWER✔✔- the number that is divided into a criterion of
strengthin order to obtain a design criterion
,bearing stress - CORRECT ANSWER✔✔- stress caused by the surface of hole in the plates
age hardening - CORRECT ANSWER✔✔- occurs in some metals, at ambient temp after
solution heat treatment, the process being one 9f a constituent percipitating from solid
solution
anisotropy - CORRECT ANSWER✔✔- the characteristic of exhibiting different properties
when tested in different directions
alloying element - CORRECT ANSWER✔✔- usually considered to be metallic elements
added for the purpose of modifying the properties
brittleness - CORRECT ANSWER✔✔- tendency to fracture without appreciable
deformation
charpy test - CORRECT ANSWER✔✔- one in which specimen, supported at both ends as a
simple beam
cold shortness - CORRECT ANSWER✔✔- the brittleness of metals at ordinary or low
temperatures
cold working - CORRECT ANSWER✔✔- the process of deforming a metal plastically at a
temo below the recrystallization temp
damping capacity - CORRECT ANSWER✔✔- ability of a material to absorb or damp
vibrations
decarburization - CORRECT ANSWER✔✔- is a loss of carbon from the surface of steel,
occuring suring hot rolling, forging, and heat treating
ductility - CORRECT ANSWER✔✔- the property that permits permanent deformation
before fracture in tension
, elasticity - CORRECT ANSWER✔✔- abilitybof a material to be deformed and to return to
the original shape
embrittlement - CORRECT ANSWER✔✔- involves the loss of ductility because of a
physical or chemical change of the material
free carbon - CORRECT ANSWER✔✔- is that part of a carbon content of steel or iron that
is in the form of graphite or temper carbon
hard drawn - CORRECT ANSWER✔✔- a temper produced in a wire, rod or tube by cold
drawing
homogenous material - CORRECT ANSWER✔✔- hace the same structure at all points
isotropic - CORRECT ANSWER✔✔- materials have the same properties at all directions
izod test - CORRECT ANSWER✔✔- a test in which a specimen, supported at one end as a
cantilever beam
killed steel - CORRECT ANSWER✔✔- a steel that has been deoxidized with a strong
deoxidizing agent
machinability - CORRECT ANSWER✔✔- a somewhat indefinite property that refers to the
relative ease with which material can ce cut
malleability - CORRECT ANSWER✔✔- a material susceptible to extreme deformationin
rolling or hammering
mechanical properties - CORRECT ANSWER✔✔- those that have to do with stress and
strain
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