TEP WCI 7

Magnetic particle is a nondestructive testing method used for:

• locating surface and near surface discontinuities in aluminum

• locating surface and near surface discontinuities in steel.

• finding and measuring material separation.

• measuring flux density.

Which of the following can be magnetized?

• iron

• copper

• aluminium

• magnesium

Magnetic flux lines that are parallel to a discontinuity produce:

• strong indications.

• weak indications.

• no indications.

• fuzzy indications.

Which of the following is an advantage of magnetic particle testing over penetrant testing?

• It does not require post-cleaning of the part.

• It requires direct access to the surface of the part.

• It can detect near-surface discontinuities.

• It requires ~ shorter dwell time to produce results

The flux within and surrounding a magnetized part or around a conductor carrying a current is known as:

• the saturation point.

• a magnetic field.

• the ferromagnetic field.

• the paramagnetic field

The magnetism that remains in a piece of magnetizable material after the magnetizing force has been removed is called the:

• tramp magnetism.

• residual magnetism.

• damped magnetism.

• permanent magnetism

Fluorescent magnetic particle indications should be inspected under:

• any light.

• a neon light.

• an ultraviolet light.

• a fluorescent light

Magnetic particle inspection is not a reliable method of detecting:

• laps

• deep internal cavities.

• cracks.

• seams

The strength of the magnetic field induced in a part is often referred to as:

• current density.

• voltage.

• flux density.

• retentivity.

Magnetic particle testing will reveal discontinuities in which one of the following materials?

• bronze

• carbon steel

• aluminum castings

• austenitic stainless steel