Electromagnetic Testing Quiz WITH
ANSWERS RATED A+
Electromagnetic testing is one of the oldest testing methods. - correct answer ✔✔ True
Oersted discovered that a compass placed near a wire transmitting an electric current tends to
set itself perpendicular to the wire. - correct answer ✔✔ True
Faraday was the first scientist who discovered the effect of electromagnetic induction. - correct
answer ✔✔ True
The first practical system for measurement of flux leakage fields was discovered by Maxwell -
correct answer ✔✔ False
Eddy current testing is based on the principles of electromagnetic induction. - correct answer
✔✔ True
Electromagnetic simply means using electricity and sound waves. - correct answer ✔✔ False
Magnetic flux leakage can be detected using which of the following techniques? - correct
answer ✔✔ D. All of the above, MT (wet or dry), Hall Effect probe, and Induction coil
The presence of a discontinuity on or near the surface of a test object disturbs the magnetic flux
lines and results in a local leakage field around the discontinuity. - correct answer ✔✔ True
There are three levels of NDT personnel certs, level I, level II, and level III. - correct answer ✔✔
True
, Qualification of NDT personnel should involve the following. - correct answer ✔✔ D. All of the
above, Training, Experience, Ability to pass written and practical exams
The electromagnetic field produced around the coil is directly proportional to: - correct answer
✔✔ D. All of the above, Magnitude of the applied current, Rate of change in current, Coil
parameters
Electrical current is defined as the movement of electrons through a conductor - correct answer
✔✔ True
The unit of electromagnetic force is called ampere. - correct answer ✔✔ False
The unit of resistance is: - correct answer ✔✔ A. Ohm
Ohm's Law is stated in the following formula - correct answer ✔✔ B. E = IR or V = IR
The resistance of a coil is determined by the length or wire used to wind a coil. - correct answer
✔✔ True
The frequency of an alternating current is defined as the number of cycles of current that occur
in one minute. - correct answer ✔✔ False
The opposition to changes in alternating current flow through a coil is called: - correct answer
✔✔ C. Inductive reactance
The unit of impedance is: - correct answer ✔✔ D. Ohm
ANSWERS RATED A+
Electromagnetic testing is one of the oldest testing methods. - correct answer ✔✔ True
Oersted discovered that a compass placed near a wire transmitting an electric current tends to
set itself perpendicular to the wire. - correct answer ✔✔ True
Faraday was the first scientist who discovered the effect of electromagnetic induction. - correct
answer ✔✔ True
The first practical system for measurement of flux leakage fields was discovered by Maxwell -
correct answer ✔✔ False
Eddy current testing is based on the principles of electromagnetic induction. - correct answer
✔✔ True
Electromagnetic simply means using electricity and sound waves. - correct answer ✔✔ False
Magnetic flux leakage can be detected using which of the following techniques? - correct
answer ✔✔ D. All of the above, MT (wet or dry), Hall Effect probe, and Induction coil
The presence of a discontinuity on or near the surface of a test object disturbs the magnetic flux
lines and results in a local leakage field around the discontinuity. - correct answer ✔✔ True
There are three levels of NDT personnel certs, level I, level II, and level III. - correct answer ✔✔
True
, Qualification of NDT personnel should involve the following. - correct answer ✔✔ D. All of the
above, Training, Experience, Ability to pass written and practical exams
The electromagnetic field produced around the coil is directly proportional to: - correct answer
✔✔ D. All of the above, Magnitude of the applied current, Rate of change in current, Coil
parameters
Electrical current is defined as the movement of electrons through a conductor - correct answer
✔✔ True
The unit of electromagnetic force is called ampere. - correct answer ✔✔ False
The unit of resistance is: - correct answer ✔✔ A. Ohm
Ohm's Law is stated in the following formula - correct answer ✔✔ B. E = IR or V = IR
The resistance of a coil is determined by the length or wire used to wind a coil. - correct answer
✔✔ True
The frequency of an alternating current is defined as the number of cycles of current that occur
in one minute. - correct answer ✔✔ False
The opposition to changes in alternating current flow through a coil is called: - correct answer
✔✔ C. Inductive reactance
The unit of impedance is: - correct answer ✔✔ D. Ohm
