A term to define the phenomenon where, at very high frequencies, the...
Eddy current testing relies on the principle of:
A term used to define 2 or more coils electrically connected in...
The thickness of nonconductive coatings on a conductive base can be...
The symbol commonly used to signify impedance is:
The actual frequency used in any specific eddy current inspection...
The conductivity value for a metal is a function of the :
When a rod is placed in an encircling type of coil, the density of...
When testing by the eddy current method, discontinuities will be most...
Tubing is generally inspected using:
The atoms of a metal showing magnetic characteristics are grouped into...
When the voltage applied to a circuit and the current through the...
When testing small parts in an eddy current encircling coil for...
When testing ferrous materials, a small but detectable portion of the...
The magnetic field generated by eddy currents induced in a test...
A term used to describe the effect observed due to a change in...
The term used to define the value of H field required to decrease the...
The magnetizing force of an eddy current test coil is usually...
When a nonmagnetic rod is placed inside an eddy current test coil:
The inductive reactance of a test coil can be calculated using the...
The magnetic domains in an unmagnetized ferromagnetic material are:
The heating effect in magnetic materials caused by work required to...
When eddy current testing a nonferrous material, the choice of test...
When the electrical current in an eddy current coil reverses...
The inductive reactance of a coil is measured in units of:
Which of the following materials would have the highest resistivity...
When a magnetic material is placed in a region of an applied...
A major problem associated with eddy current test method is the:
The impedance of a test coil usually can be represented by the vector...
The fill factor when a 1/2 inch diameter bar is inserted in a 1 inch...
When the H field strength around a material is increased and then...
The 3 major specimen parameters which influence eddy current testing...
Frequency ratio f/f can be defined as:
In eddy current testing, the specimen is coupled to the test coil by:
A term used to define the timing relationship invovled in alternating...
Which of the following could be used to suppress unwanted high...
For age hardenable aluminum and titanium alloys, changes in hardness...
term fill factor applies to:
2 TEST COILS ARE OFTEN USED IN A BRIDGE CIRCUIT
A method of minimizing the effect of indications caused by gradual...
Which of the following methods may be used to improve the...
In a test coil consisting of both a primary and secondary winding, the...
At a fixed test frequency, in which of the following materials will...
An out-of-phase condition between current and voltage:
Which of the following conditions is not important when selecting...
Which of the following materials would be more likely used as a...
Which of the following would be easier to detect in tubing by the eddy...
A term used to define a material having a permeability less than that...
An eddy current system using handling equipment with automatic marking...
When conducting an eddy current test, variations in the test...
Doubling the number of turns on a coil will:
When testing tubing, using an encircling (OD) coil, What is the phase...
The term used to define the difference between actual instrument...
To eliminate any dependence upon the number of turns of a test coil,...
A term used to define a surface or internal rupture which is...
The ratio of a material's flux density to a test coil's magnetizing...
The flux density in a magnetic material is usually designated by the :
If the characteristic frequency (fq) of a material is 125 hz, the test...
When eddy current testing tubing with a system that includes a...
When eddy current testing by the linear time-base method, what is...
The ratio of the specific diameter of a probe to the minimum...
The penetration of eddy currents in a conductive material is decreased...
In order to decrease the effect on conductivity readings due to...
If the test frequency increases while field strength is held constant,...
Which of the following coil arrangements would eliminate or decrease...
Which of the following is not a commonly used eddy current testing...
The impedance change of an eddy current test coil due to a change in...
A decrease in conductivity is equivalent to:
A term used to define an eddy current test coil which uses magnetic...
The formula used to calculate the impedance of an eddy current test...
When testing magnetic materials in a ac field, increasing the field...
A term used to define an instrumentation technique which discriminates...
When eddy current testing by the ellipse method, the normal indication...
The circuits which make it possible to minimize the effect of signals...
A term used to define a surface coil mounted so that the coil can be...
The vector-point, ellipse, and linear time-base methods are all...
As the fill factor decreases, the impedance variation of a pickup coil...
It is frequently possible to separate the conductivity variable from...
A term used to define a system which indicates only the magnitude...
When a coil's magnetizing force is applied to a ferromagnetic...
When eddy current testing by ellipse method, one variable may be...
Impedance diagrams have been mathematically derived and experimentally...
In modulation analysis testing, which of the following would not...
A term to define a property of a test system which enables the...
A term used to define any change in a sinusoidal signal when the...
Which of the following is not a factor that affects the inductance of...
In inspecting ferromagnetic materials, relatively low frequencies are...
If the conductivity of a test part in an eddy current test coil...
An eddy current test coil's magnetic field intensity in air:
When eddy current testing by the linear time base method, what is...
To be useful, limit frequency equations must be:
The use of magnetic shielding around the exciting coil will generally: