ASNT Basic Level 3 Final Exam
Questions and Answers 2025/2026
Which method uses an exact sample with the defect sizes? - CORRECT ANSWER-Radiography-
penetrameter
which type of discipline studies effects of discontinuity sizing? - CORRECT ANSWER-Fracture Analysis
,In RT, an intensity at 25" is 200 mR/Hr. What is the intensity at 150" - CORRECT ANSWER-Inverse
Square Law. 36 mR/hr
If in RT, I move to 24" to 12", how much greater is the intensity? - CORRECT ANSWER-4x as much
What happens if I increase magnification in a visual examination? - CORRECT ANSWER-Lose the field of
view
Which MT technique leaves the strongest residual in a long beam that needs demagnetization? -
CORRECT ANSWER-Circular magnetism doesn't go into the environment and therefore the most
difficult to demagnetize because it must first be converted to longitudinal mag. Strongest residual field
bearing into the environment, then the answer would be longitudinal.
Part is to be inspected in a coil. Where is the maximum flux? - CORRECT ANSWER-At the inside surface
of the coil
How can you tell the difference between 3400 stainless steel vs 4400 stainless steel? - CORRECT
ANSWER-Magnetization
Austenitic SS will not magnetize, this is the 3400 SS.
Martin tic SS will somewhat magnetize, this is the 4400 SS.
Martin Tic and Nickle Alloys have what properties associated with them? - CORRECT ANSWER-
Magnetizing properties
Austenitic SS are not magnetic .
Martin tic are paramagnetic and some can be magnetized. Nickle is a ferro-magnetic material.
What are the minimum and maximum solder temperatures? - CORRECT ANSWER-One for the answers
was from 250-450°F which is less than 850°F where brazing starts.
What temperature does brazing start? - CORRECT ANSWER-850°F
, 1 curie(Ci)=3.7x10^10 becquerel(Bq) - CORRECT ANSWER-Conversion of Curie to Bq
A UT inspection that uses two transducers on one side of the part- This technique is known? - CORRECT
ANSWER-Pitch/Catch
A UT angle beam inspection is most apt to miss what? - CORRECT ANSWER-Laminations parallel to the
surface. Watch out for one answer as it has perpendicular to the surface and angle beam can see this
type of indication.
A UT inspection that utilizes a diagram made from the same size flat bottom holes at different
distances? This is known as? - CORRECT ANSWER-A DAC curve. Whether it is brought to horizontal, or
left as a curved line, it is known as a reference line.
What would amperage used for prod spacing for material thickness of one inch using a spacing of five
inches? - CORRECT ANSWER-If material is thicker that 3/4", the normal amperages are considered to
be 125 amperages for each inch of spacing. Therefore, the answer would be 125 x 5= 625 amps. The
answer was 500- 625 amps. Note: if material is thinner than 3/4", the amperage is 90-100 amps per
inch, or 400-500 amps.
What type of current is usually used for portable magnetic particle probe? - CORRECT ANSWER-Half
wave DC (Mean Amps). Some MT probes have switch to allow either AC(RMS amps) or HWDC(Mean
amps). They're also probes that only uses AC.
What advantage of a lost wax casting over the other types of casting processes?> - CORRECT ANSWER-
Usually casting doesn't require machining.
A die casting molds utilize the technique of ? - CORRECT ANSWER-Metal being inserted under pressure
A type of welding without a third metal is? - CORRECT ANSWER-E.B. Weld(Electron Beam), Friction Stir
welding
Oldest, most basic form of welding? - CORRECT ANSWER-Heliarc
Questions and Answers 2025/2026
Which method uses an exact sample with the defect sizes? - CORRECT ANSWER-Radiography-
penetrameter
which type of discipline studies effects of discontinuity sizing? - CORRECT ANSWER-Fracture Analysis
,In RT, an intensity at 25" is 200 mR/Hr. What is the intensity at 150" - CORRECT ANSWER-Inverse
Square Law. 36 mR/hr
If in RT, I move to 24" to 12", how much greater is the intensity? - CORRECT ANSWER-4x as much
What happens if I increase magnification in a visual examination? - CORRECT ANSWER-Lose the field of
view
Which MT technique leaves the strongest residual in a long beam that needs demagnetization? -
CORRECT ANSWER-Circular magnetism doesn't go into the environment and therefore the most
difficult to demagnetize because it must first be converted to longitudinal mag. Strongest residual field
bearing into the environment, then the answer would be longitudinal.
Part is to be inspected in a coil. Where is the maximum flux? - CORRECT ANSWER-At the inside surface
of the coil
How can you tell the difference between 3400 stainless steel vs 4400 stainless steel? - CORRECT
ANSWER-Magnetization
Austenitic SS will not magnetize, this is the 3400 SS.
Martin tic SS will somewhat magnetize, this is the 4400 SS.
Martin Tic and Nickle Alloys have what properties associated with them? - CORRECT ANSWER-
Magnetizing properties
Austenitic SS are not magnetic .
Martin tic are paramagnetic and some can be magnetized. Nickle is a ferro-magnetic material.
What are the minimum and maximum solder temperatures? - CORRECT ANSWER-One for the answers
was from 250-450°F which is less than 850°F where brazing starts.
What temperature does brazing start? - CORRECT ANSWER-850°F
, 1 curie(Ci)=3.7x10^10 becquerel(Bq) - CORRECT ANSWER-Conversion of Curie to Bq
A UT inspection that uses two transducers on one side of the part- This technique is known? - CORRECT
ANSWER-Pitch/Catch
A UT angle beam inspection is most apt to miss what? - CORRECT ANSWER-Laminations parallel to the
surface. Watch out for one answer as it has perpendicular to the surface and angle beam can see this
type of indication.
A UT inspection that utilizes a diagram made from the same size flat bottom holes at different
distances? This is known as? - CORRECT ANSWER-A DAC curve. Whether it is brought to horizontal, or
left as a curved line, it is known as a reference line.
What would amperage used for prod spacing for material thickness of one inch using a spacing of five
inches? - CORRECT ANSWER-If material is thicker that 3/4", the normal amperages are considered to
be 125 amperages for each inch of spacing. Therefore, the answer would be 125 x 5= 625 amps. The
answer was 500- 625 amps. Note: if material is thinner than 3/4", the amperage is 90-100 amps per
inch, or 400-500 amps.
What type of current is usually used for portable magnetic particle probe? - CORRECT ANSWER-Half
wave DC (Mean Amps). Some MT probes have switch to allow either AC(RMS amps) or HWDC(Mean
amps). They're also probes that only uses AC.
What advantage of a lost wax casting over the other types of casting processes?> - CORRECT ANSWER-
Usually casting doesn't require machining.
A die casting molds utilize the technique of ? - CORRECT ANSWER-Metal being inserted under pressure
A type of welding without a third metal is? - CORRECT ANSWER-E.B. Weld(Electron Beam), Friction Stir
welding
Oldest, most basic form of welding? - CORRECT ANSWER-Heliarc
