EDDY CURRENT 1 QUIZ 6 WITH
VERIFIED ANSWERS
Internal coils are more sensitive to discontinuities? - ANS ✔✔A. on or the external surface of
the tested.
B. on or near the internal surface of the tested tubes.
C. deep within the material thickness of the test objects.
D. only as far as the tube traverses the test object.
A bobbin coil is? - ANS ✔✔A. an encircling coil meant to test bars.
B. a surface coil used to test for conductivity variations.
C. an internal coil used to test tubular test objects from the inside.
D. a high fill factor type of probe.
Bobbin coils or inside probes are more sensitive to discontinuities? - ANS ✔✔A. both near the
inner and outer surface of tubing.
B. near the inner surface of tubing.
C. near the outer surface of tubing.
D. near the end of tubing.
While inspecting a large rod with an encircling coil, the current at the center is null. This
phenomenon is known as? - ANS ✔✔A. hall effect.
B. ned effect.
C. edge effect.
D. center effect.
VERIFIED ANSWERS
Internal coils are more sensitive to discontinuities? - ANS ✔✔A. on or the external surface of
the tested.
B. on or near the internal surface of the tested tubes.
C. deep within the material thickness of the test objects.
D. only as far as the tube traverses the test object.
A bobbin coil is? - ANS ✔✔A. an encircling coil meant to test bars.
B. a surface coil used to test for conductivity variations.
C. an internal coil used to test tubular test objects from the inside.
D. a high fill factor type of probe.
Bobbin coils or inside probes are more sensitive to discontinuities? - ANS ✔✔A. both near the
inner and outer surface of tubing.
B. near the inner surface of tubing.
C. near the outer surface of tubing.
D. near the end of tubing.
While inspecting a large rod with an encircling coil, the current at the center is null. This
phenomenon is known as? - ANS ✔✔A. hall effect.
B. ned effect.
C. edge effect.
D. center effect.
