MFL Exam

Magnetic flux leakage testing (MFL) will most easily detect changes in the following materials:

In NDT, the term “method” refers to:

Which of the following is strictly considered a “surface” method?

A unit of magnetic flux density is the:

Magnetic flux leakage is most reluctant to travel in:

MFL search coils detect a change in the material
because:

Hall effect sensors are:

A document that provides recommendations for the qualification and certification of NDT test personnel is

Which of the following is a flux-sensing device that is dependent on some sort of time variation of field intensity?

Which of the following is a diamagnetic material?

The distance of a sensing coil from a test surface is
called the:

Flux leakage changes can be detected with which of the following coils?

A magnetic alternating current (AC) bridge is usually made of what type of material?

As material thickness increases, the flux density decreases. This will also decrease the:

While performing a magnetic flux leakage test utilizing a search coil, an increase in the flux leakage will result in what in the coil?

With a hall effect sensor, the output is proportional to the:

Ferrites are used with pickup coils to:

The MFL method is applicable to:

To detect gradual wall loss, which of the following detectors must be used?

Which one of the following materials is not used as a permanent magnet?

What type of test is MFL?

Which system should be used for inspecting petroleum and gas pipelines?

Which type of magnet is normally used in smart pigs?

Which of the following materials may be used for the conductor in Figure 1?

How do the lines of force outside of a magnet travel?

In a magnetizing coil, the strength of the magnetic field is dependent upon:

The magnetic properties and hysteresis loops are affected by:

Which of the following flux leakage sensing elements is equivalent to a flux gate magnetometer?

What kind of sensor is a solid-state device, the resistance of which changes with magnetic field intensity?

To detect perturbations in a static magnetic field, which kind of sensors must have relative motion between the sensor and the field (such that flux within the sensor changes)?