The ratio of the response or amplitude from signals of interest to the response or amplitude of indications that contain no useful information for the test being conducted
What is
signal to noise ratio
100
An eddy current is a circulating electrical current induced in a electrically conductive material by:
What is An alternating magnetic field
100
The response to the primary magnetic field generated by eddy currents induced in a test specimen:
What is Opposition to the magnetic field that induced those eddy currents (secondary field)
100
a comparative piece of material which may contain artificial or natural discontinuities or be free of discontinuities depending on the type of test being conducted
What is Calibration standards used for eddy current testing
100
A term used to define an instrumentation technique which discriminates between variables in the test part by the different phase angle changes which these conditions produced in the test signal is:
What is Phase analysis
200
The arrangement that can be used in surface Probes, as well as encircling, and inside diameter coils
What is single absolute coil
200
A term used to define TWO or more coils connected such that any condition which is NOT common to both coils will produce an output signal is:
What is Differential
200
A term used to define an instrumentation technique which discriminates between variables in the test part by the different phase angle changes which these conditions produced in the test signal is:
What is Phase analysis
200
The thickness of nonconductive coatings on a conductive base can be most simply measured by:
What is : Observing the lift-off effect caused by the coating
200
When considering the limitations associated with the eddy current test method s the Large number of known or unknown variables which appear in the output indication is considered to be ....
:
What is A major problem
300
the type of probe used that is generally inspecting Tubing:
What is Encircling coils
300
The Eddy Current test often used to determine heat treat condition , sorting of the alloy of a material , and measuring heat damage that has occurred
What is Conductivity
300
A sheet of paper between the probe and article can be used to set
What is Lift-off
300
The relative size of windings in Eddy current test coils which are normally used to detect Changes in conductivity
What is a wide coil
300
The phenomenon that is utilized in the Measuring the thickness of nonconductive coatings
What is lift-off
400
The type of coil of which its secondary windings purpose is to Detects changes in the eddy current flow
What is differential eddy current coil
400
A measure of ease with which electrons can flow through a material
What is Conductivity
400
the total opposition to current flow in a coil.
What is impedance
400
The orientation of magnetic domains that neutralize each other in a NON magnetized ferromagnetic material
What is Randomly oriented
400
The coil arrangement which can be used in: encircling, and inside diameter Probe coils
What is . single absolute
500
The Conductivity, Permeability, and Lift-off of a test specimen all have an affect on the Blank of an eddy current test probe
What is impedance
500
a circulating electrical current induced in a electrically conductive material by an alternating magnetic field:
What is an eddy current
500
It is based on the International Annealed Copper Standard with a specific grade of copper being 100%.
What is (IACS)
500
to minimize signal changes that are not relevant to conditions within the specimen to be tested during bolt hole inspection , it is important to
What is hold the fill factor or lift-off constant
500
Encircling coils are generally for inspecting what type of part