EDDY CURRENT 2 QUIZ 11
QUESTIONS WITH VERIFIED
ANSWERS
Which of the following is not an example of an eddy current testing application? - correct
answer ✔✔ A. detection of cracks and seams in cold drawn bars.
B. detection of laps and pits in hot-rolled bars.
C. detection of fatigue limit in the wire.
D. detection of weld discontinuities in tube and pipe.
Detection of discontinuities is as a result of? - correct answer ✔✔ A. a localized change in coil
impedance.
B. the coil fill factor
C. a localized change in the resistance of the coil.
D. increased magnetic permeability in the test coil.
Which of the following leads to a sudden, brief change in impedance? - correct answer ✔✔ A. a
test object that has very uniform and isotropic conductivity properties.
B. a crack-type discontinuity.
C. a change in the relative humidity in the environment.
D. increase in temperature of the coil.
Cyclic loading generates which type of crack? - correct answer ✔✔ A. fatigue crack
B. stress corrosion crack
C. hydrogen embrittlement
D. intergranular corrosion
, The most prevalent alloy found in aerospace construction is? - correct answer ✔✔ A. steel
B. brass
C. lead
D. aluminum
Which is not an example of eddy current test used to measure coatings? - correct answer ✔✔
A. metal foil on a nondestructive base material.
B. metal cladding with the same conductivity as the material.
C. nonconductive coating on a metallic base material.
D. metal cladding with a lower conductivity than the base material.
In what way is the design of weld inspection probes different from the material sorting type of
probe? - correct answer ✔✔ A. they are large in size.
B. they are more flexible in nature.
C. they are designed to help compensate for localized permeability variations as well as liftoff.
D. they are designed for use only with half-wave rectified alternating frequency.
Conductivity measurements are provided in which basic units? - correct answer ✔✔ A. ohms
B. tesla
C. hertz
D. %IACS or siemens or meter (S/m)
Cracks in material adjacent to fastener holes can be reliably detected using which technique? -
correct answer ✔✔ A. alternating current field measurement
B. eddy current testing
C. alternating current potential drop
QUESTIONS WITH VERIFIED
ANSWERS
Which of the following is not an example of an eddy current testing application? - correct
answer ✔✔ A. detection of cracks and seams in cold drawn bars.
B. detection of laps and pits in hot-rolled bars.
C. detection of fatigue limit in the wire.
D. detection of weld discontinuities in tube and pipe.
Detection of discontinuities is as a result of? - correct answer ✔✔ A. a localized change in coil
impedance.
B. the coil fill factor
C. a localized change in the resistance of the coil.
D. increased magnetic permeability in the test coil.
Which of the following leads to a sudden, brief change in impedance? - correct answer ✔✔ A. a
test object that has very uniform and isotropic conductivity properties.
B. a crack-type discontinuity.
C. a change in the relative humidity in the environment.
D. increase in temperature of the coil.
Cyclic loading generates which type of crack? - correct answer ✔✔ A. fatigue crack
B. stress corrosion crack
C. hydrogen embrittlement
D. intergranular corrosion
, The most prevalent alloy found in aerospace construction is? - correct answer ✔✔ A. steel
B. brass
C. lead
D. aluminum
Which is not an example of eddy current test used to measure coatings? - correct answer ✔✔
A. metal foil on a nondestructive base material.
B. metal cladding with the same conductivity as the material.
C. nonconductive coating on a metallic base material.
D. metal cladding with a lower conductivity than the base material.
In what way is the design of weld inspection probes different from the material sorting type of
probe? - correct answer ✔✔ A. they are large in size.
B. they are more flexible in nature.
C. they are designed to help compensate for localized permeability variations as well as liftoff.
D. they are designed for use only with half-wave rectified alternating frequency.
Conductivity measurements are provided in which basic units? - correct answer ✔✔ A. ohms
B. tesla
C. hertz
D. %IACS or siemens or meter (S/m)
Cracks in material adjacent to fastener holes can be reliably detected using which technique? -
correct answer ✔✔ A. alternating current field measurement
B. eddy current testing
C. alternating current potential drop
