Electromagnetic Testing - ECT Q&A

Q4. Eddy currents travel:
a) in closed paths.
b) in nonconductive materials.
c) axially when testing rod with an encircling coil.
d) perpendicular to the test surface.
Q5. At any given instant a spring loaded internal probe can inspect:
a) one complete circumference of the product.
b) an area roughly defined by the size of the probe coil.
c) one longitudinal line the length of the product.
d) none of the above.
Q6. Some products commonly tested with encircling probes are:
a) rods, tubes and wires.
b) interior of hollow tubes.
c) sheets and metallized foil.
d) all of the above.
Charlie Chong/ Fion Zhang