2025 ASNT BASIC LEVEL 3 EXAM WITH 170+
QUESTIONS & CORRECT ANSWERS LATEST EXAM
What are the minimum and maximum solder temperatures? - ANSWER-One for the answers was from 250-450°F which is less than 850°F where brazing starts.
What temperature does brazing start? - ANSWER-850°F
- curie(Ci)=3.7x10^10 becquerel(Bq) - ANSWER-Conversion of Curie to Bq
A UT inspection that uses two transducers on one side of the part- This technique is known? - ANSWER-Pitch/Catch
A UT angle beam inspection is most apt to miss what? - 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? - 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? - 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.
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What type of current is usually used for portable magnetic particle probe? - 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?> - ANSWER-Usually casting doesn't require machining.
A die casting molds utilize the technique of ? - ANSWER-Metal being inserted under pressure
A type of welding without a third metal is? - ANSWER-E.B. Weld(Electron Beam), Friction Stir welding
Oldest, most basic form of welding? - ANSWER-Heliarc
Which method uses an exact sample with the defect sizes? - ANSWER- Radiography-penetrameter
which type of discipline studies effects of discontinuity sizing? - ANSWER- Fracture Analysis
In RT, an intensity at 25" is 200 mR/Hr. What is the intensity at 150" - ANSWER- Inverse Square Law. 36 mR/hr
If in RT, I move to 24" to 12", how much greater is the intensity? - ANSWER-4x as much
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What happens if I increase magnification in a visual examination? - ANSWER- Lose the field of view
Which MT technique leaves the strongest residual in a long beam that needs demagnetization? - 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? - ANSWER-At the inside surface of the coil
How can you tell the difference between 3400 stainless steel vs 4400 stainless steel? - 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? - ANSWER-Magnetizing properties Austenitic SS are not magnetic .Martin tic are paramagnetic and some can be magnetized. Nickle is a ferro- magnetic material.
What is the best possible conductor? - ANSWER-Silver(pure)
To SNT-TC-1A, if an employee leaves the employer, his/her certification is? - ANSWER-Terminated immediately
Steel cannot be welded to? - ANSWER-Aluminum
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