Eddy Current - Final Exam
QUESTIONS WITH VERIFIED
ANSWERS
Latex paint - ANS ✔✔Eddy currents cannot be induced in:
Surface-breaking or near-surface discontinuities in electrically conductive materials - ANS
✔✔Eddy current is principally used to detect:
Close paths - ANS ✔✔Eddy currents always travel in:
Surface and near surface flaw detection not deeper than 10 mm in electrically conductive
materials. - ANS ✔✔Eddy current is used for:
A coil - ANS ✔✔A term used to define one or more turns or loops of a conductor wound in such
a manner as to produce and axial magnetic field when current passes through the conductor is:
common applications for ET - ANS ✔✔· Measurement of conductivity or a combination of
conductivity and permeability.
· Measurement of thickness of thin metal sections, cladding, or coating.
· Measurement Non-conductive thickness
· Carrying out Overheat Inspections
The magnetic field. - ANS ✔✔The region around a magnet which attract other pieces of iron or
steel is called:
, electricity and magnetism - ANS ✔✔The negative electron is the principle subatomic particle
that is responsible for
iron or steel. - ANS ✔✔The magnetic field is the region around a magnet which attract other
pieces
· The coil parameters.
· The magnitude of the applied AC current.
· The frequency of the applied AC current. - ANS ✔✔The characteristics of alternating magnetic
field in the vicinity of the AC coil are affected by:
Gauss or Tesla - ANS ✔✔A term used to define a unit of flux density is
"u" - ANS ✔✔A symbol commonly used to express permeability is the Greek symbol
Residual Magnetism - ANS ✔✔All ferromagnetic materials that have been magnetically
saturated to suppress permeability variations may retain a certain amount of the magnetization
called
· May affect the operation or accuracy of instruments when the specimen is placed in service.
· May interfere with the proper functioning of the part.
· Might cause particles to be attracted and held to the surface of moving parts. - ANS
✔✔Demagnetization is generally needed when the residual field in a specimen:
Hysteresis Loop - ANS ✔✔All highly Ferromagnetic Material can display their magnetic
characteristics on a
percentage of IACS - ANS ✔✔Electrical conductivity is measured in
QUESTIONS WITH VERIFIED
ANSWERS
Latex paint - ANS ✔✔Eddy currents cannot be induced in:
Surface-breaking or near-surface discontinuities in electrically conductive materials - ANS
✔✔Eddy current is principally used to detect:
Close paths - ANS ✔✔Eddy currents always travel in:
Surface and near surface flaw detection not deeper than 10 mm in electrically conductive
materials. - ANS ✔✔Eddy current is used for:
A coil - ANS ✔✔A term used to define one or more turns or loops of a conductor wound in such
a manner as to produce and axial magnetic field when current passes through the conductor is:
common applications for ET - ANS ✔✔· Measurement of conductivity or a combination of
conductivity and permeability.
· Measurement of thickness of thin metal sections, cladding, or coating.
· Measurement Non-conductive thickness
· Carrying out Overheat Inspections
The magnetic field. - ANS ✔✔The region around a magnet which attract other pieces of iron or
steel is called:
, electricity and magnetism - ANS ✔✔The negative electron is the principle subatomic particle
that is responsible for
iron or steel. - ANS ✔✔The magnetic field is the region around a magnet which attract other
pieces
· The coil parameters.
· The magnitude of the applied AC current.
· The frequency of the applied AC current. - ANS ✔✔The characteristics of alternating magnetic
field in the vicinity of the AC coil are affected by:
Gauss or Tesla - ANS ✔✔A term used to define a unit of flux density is
"u" - ANS ✔✔A symbol commonly used to express permeability is the Greek symbol
Residual Magnetism - ANS ✔✔All ferromagnetic materials that have been magnetically
saturated to suppress permeability variations may retain a certain amount of the magnetization
called
· May affect the operation or accuracy of instruments when the specimen is placed in service.
· May interfere with the proper functioning of the part.
· Might cause particles to be attracted and held to the surface of moving parts. - ANS
✔✔Demagnetization is generally needed when the residual field in a specimen:
Hysteresis Loop - ANS ✔✔All highly Ferromagnetic Material can display their magnetic
characteristics on a
percentage of IACS - ANS ✔✔Electrical conductivity is measured in
