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ASNT Level 3 Basic Materials & Processes Questions & Detailed Answers 2024
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ASNT Level 3 Basic Materials & Processes Questions & Detailed Answers 2024
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ASNT Level 3 Basic Materials & ProcessesQuestions & Detailed Answers 2024
Fracture is a type of material failure. Of the following which is another type
of material failure? - ANS Permanent deformation.
Which of the following statements best differentiates between a defect and a
discontinuity? - ANS Discontinuities can propagate and become defects.
Nondestructive testing is often differentiated from other measurements or
inspection techniques in that: - ANS NDT involves indirect tests related to
some other quality or characteristic of material.
What are the functions of NDT? - ANS Identifying and sorting of material.
Identifying of material properties.
Ensuring absence of faults or defects that could cause a part to fail.
An important basis for the success of fracture control design procedures is: -
ANS The need to ensure that unexpected flaws of some critical size are not
present when the component enters service.
If properly used, NDT can assist in fracture control by: - ANS Providing an
accurate evaluation of the number and type of discontinuities that exist in a
material .
A statement that a particular experiment produced a 0.9 probability of
detection with a 95% confidence level means that: - ANS There is a 5%
probability that the probability of detection is overstated.
, Most solid metals and plastics that have reasonable strength at room
temperature are called: - ANS Engineering materials.
Material properties, as used in design, are most frequently determined by: -
ANS Materials testing.
Even at the early stages of product planning, NDT should be considered
because: - ANS The design of the part should permit easy access to critical
areas for later inspection.
which of the following material properties are of most concern if corrosion
resistance is essential? - ANS Chemical properties.
Which of the following is true relative to the comparison of the properties of
aluminum-based alloys and iron-based alloys? - ANS Iron can exist in several
different crystalline structures and its properties can be controlled by heat
treatment.
Tensile test are conducted on specimens from a newly developed alloy in
order to determine the ultimate tensile strength of the material. Such tests
are referred to as: - ANS Destructive tests.
A bar that is 2 in. long, 2 in. wide and 1 in. thick is subjected to a tensile load
acting along the lenght of the bar of 36000 lbs. What is the tensle stress
within the bar? - ANS 18000 psi.
What is Point B on the Stress-Strain diagram where it first starts to curve? -
ANS Elastic limit.
Stress-Strain diagram, which of the following ranges indicates the affect of
work hardening, to its maximum, caused by plastic flow of the material
during a tensile load? - ANS Deformation rate to the ultimate strength
,
On the Stress-Strain diagram, the points represented by E and F would be
closer together if the material being tested were: - ANS Less ductile.
The modules of elasticity, or Young's modules, is related to the material's
relative: - ANS Stiffness and yield strength.
Which of the following materials is typically considered when the application
only requires high compressive strength? - ANS Cast iron.
A fatigue failure can often be prevented by using NDT to: - ANS Detect
surface discontinuities that could be stress risers.
Which of the following tests uses a pendulum to break a specimen that is
notched and supported on both ends, with the results of measuring energy
absorption? - ANS Charpy test.
What is a S-N curve? - ANS An endurance limit curve diagram.
Direct hardness test provide a measure of a material's ability to resist: - ANS
Surface and near-surface penetration.
Under ordinary usage, metals exist as: - ANS Crystalline solids.
The term body-centered cubic BCC, face-centered cubic FCC and hexagonal
close-packed HCP all refer to the: - ANS Lattice structures that make up unit
cells in a solid metallic structure.
The process of returning ductility to cold-worked low-carbon steel is called: -
ANS Recrystallization.
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