ASNT Level 3 Basic Materials &
Processes Questions With Complete
Answers
\.Fracture is a type of material failure. Of the following which is another type of material failure?
- Answer- Permanent deformation.
\.Which of the following statements best differentiates between a defect and a discontinuity? -
Answer- Discontinuities can propagate and become defects.
\.Nondestructive testing is often differentiated from other measurements or inspection
techniques in that: - Answer- NDT involves indirect tests related to some other quality or
characteristic of material.
\.What are the functions of NDT? - Answer- 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: - Answer- 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: - Answer- 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: - Answer- 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: -
Answer- Engineering materials.
\.Material properties, as used in design, are most frequently determined by: - Answer-
Materials testing.
\.Even at the early stages of product planning, NDT should be considered because: - Answer-
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? - Answer- Chemical properties.
\.Which of the following is true relative to the comparison of the properties of aluminum-based
alloys and iron-based alloys? - Answer- 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: - Answer-
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? - Answer- 18000 psi.
\.What is Point B on the Stress-Strain diagram where it first starts to curve? - Answer- 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? - Answer-
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: - Answer- Less ductile.
\.The modules of elasticity, or Young's modules, is related to the material's relative: - Answer-
Stiffness and yield strength.
\.Which of the following materials is typically considered when the application only requires
high compressive strength? - Answer- Cast iron.
\.A fatigue failure can often be prevented by using NDT to: - Answer- 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? - Answer- Charpy
test.
\.What is a S-N curve? - Answer- An endurance limit curve diagram.
\.Direct hardness test provide a measure of a material's ability to resist: - Answer- Surface
and near-surface penetration.
\.Under ordinary usage, metals exist as: - Answer- Crystalline solids.
Processes Questions With Complete
Answers
\.Fracture is a type of material failure. Of the following which is another type of material failure?
- Answer- Permanent deformation.
\.Which of the following statements best differentiates between a defect and a discontinuity? -
Answer- Discontinuities can propagate and become defects.
\.Nondestructive testing is often differentiated from other measurements or inspection
techniques in that: - Answer- NDT involves indirect tests related to some other quality or
characteristic of material.
\.What are the functions of NDT? - Answer- 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: - Answer- 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: - Answer- 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: - Answer- 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: -
Answer- Engineering materials.
\.Material properties, as used in design, are most frequently determined by: - Answer-
Materials testing.
\.Even at the early stages of product planning, NDT should be considered because: - Answer-
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? - Answer- Chemical properties.
\.Which of the following is true relative to the comparison of the properties of aluminum-based
alloys and iron-based alloys? - Answer- 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: - Answer-
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? - Answer- 18000 psi.
\.What is Point B on the Stress-Strain diagram where it first starts to curve? - Answer- 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? - Answer-
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: - Answer- Less ductile.
\.The modules of elasticity, or Young's modules, is related to the material's relative: - Answer-
Stiffness and yield strength.
\.Which of the following materials is typically considered when the application only requires
high compressive strength? - Answer- Cast iron.
\.A fatigue failure can often be prevented by using NDT to: - Answer- 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? - Answer- Charpy
test.
\.What is a S-N curve? - Answer- An endurance limit curve diagram.
\.Direct hardness test provide a measure of a material's ability to resist: - Answer- Surface
and near-surface penetration.
\.Under ordinary usage, metals exist as: - Answer- Crystalline solids.
