Magnetic Particle Testing (Level 2) UPDATED Actual Questions and CORRECT ANSWERS
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Course
Magnetic Particle Testing
Institution
Magnetic Particle Testing
Magnetic Particle Testing (Level 2)
UPDATED Actual Questions and
CORRECT ANSWERS
MT is a non-destructive testing method used for - CORRECT ANSWER- locating
surface and near surface discontinuities in steel
Ferromagnetic material is - CORRECT ANSWER- strongly attracted by a magnet
The permea...
Magnetic Particle Testing (Level 2)
UPDATED Actual Questions and
CORRECT ANSWERS
MT is a non-destructive testing method used for - CORRECT ANSWER✔✔- locating
surface and near surface discontinuities in steel
Ferromagnetic material is - CORRECT ANSWER✔✔- strongly attracted by a magnet
The permeability of a material describes: - CORRECT ANSWER✔✔- the ease with which it
can be magnetized
The retentivity of a material describes - CORRECT ANSWER✔✔- the ability to retain the
magnetic field
Magnetic particles are available in different colors - CORRECT ANSWER✔✔- for color
contrast with the part surface thereby enhancing detection of indications.
Which material can be magnetized - CORRECT ANSWER✔✔- iron
The magnetic field is strongest when - CORRECT ANSWER✔✔- the magnetizing current is
flowing
If a crack exists in a circular magnet, the attraction of magnetic particles to the crack is
caused by: - CORRECT ANSWER✔✔- a leakage field
The unit usually used to denote flux density is - CORRECT ANSWER✔✔- gauss.
Which statement is true when related to magnetic lines of force? - CORRECT ANSWER✔✔-
They are most dense at the poles of a magnet
,Magnetic flux lines that are parallel to a discontinuity produce - CORRECT ANSWER✔✔-
no indications
A part is adaptable to magnetic particle inspection if: - CORRECT ANSWER✔✔- the
material is ferromagnetic.
What rule describes the direction of current flow (+ to -) when lines of magnetic force
surround a conductor? - CORRECT ANSWER✔✔- right-hand rule ↩️
The magnitude of the residual magnetic field in a specimen is dependent on: - CORRECT
ANSWER✔✔- the strength of the applied magnetizing force.
The proper number of ampere-turns for a given test specimen being examined by longitudinal
magnetism is determined by: - CORRECT ANSWER✔✔- its length and diameter
A circular field may be induced into a specimen by - CORRECT ANSWER✔✔- passing
current directly through the part ⚡️
An electric yoke produces - CORRECT ANSWER✔✔- a longitudinal field
An energized coil around the part produces: - CORRECT ANSWER✔✔- a longitudinal field
In longitudinal magnetization the proper term for calculating magnetizing force is -
CORRECT ANSWER✔✔- ampere-turns
Magnetic lines of force: - CORRECT ANSWER✔✔- form a closed loop 🔄
A magnetic particle buildup from a discontinuity is strongest when the discontinuity is
oriented - CORRECT ANSWER✔✔- 90 degrees (𝗟) to the magnetic flux flow
A specimen may be demagnetized by which of the following methods? - CORRECT
ANSWER✔✔- reversing and decreasing direct current fields.
,Which of the following is an advantage of magnetic particle testing over penetrant testing? -
CORRECT ANSWER✔✔- It can detect near-surface discontinuities.
The amount of amperage used for magnetic particle inspection using the prod method is
determined from the: - CORRECT ANSWER✔✔- distance between ⬌ the prods
The flux within and surrounding a magnetised part or around a conductor carrying a current
is known as - CORRECT ANSWER✔✔- a magnetic field
The areas on a magnetized part from which the magnetic field is leaving or returning into the
part are called: - CORRECT ANSWER✔✔- magnetic poles
A metal that is difficult to magnetize is said to have - CORRECT ANSWER✔✔- low
permeability
The magnetism that remains in a piece of magnetizable material after the magnetizing force
has been removed is called
the: - CORRECT ANSWER✔✔- residual magnetism.
Subsurface discontinuity indications usually appear: - CORRECT ANSWER✔✔- wide and
fuzzy
Which residual field is most difficult to demagnetize - CORRECT ANSWER✔✔- circular ⟳
Which magnetic particle application technique is the most sensitive - CORRECT
ANSWER✔✔- continuous
Fluorescent magnetic particle indications should be inspected under - CORRECT
ANSWER✔✔- an ultraviolet light
Inspecting a part by magnetizing, removing the current flow, then applying the medium is
called the - CORRECT ANSWER✔✔- residual method
, Which of the following is the most effective method for the detection of near surface defects?
- CORRECT ANSWER✔✔- Dry continuous method using half-wave rectified current with
prods
A curve is sometimes drawn to show graphically the relation of the magnetizing force to the
strength of the magnetic
field produced in a certain material. This curve is known as the: - CORRECT ANSWER✔✔-
hysteresis curve
What method of applying particles provides greater sensitivity in locating subsurface weld
discontinuities? - CORRECT ANSWER✔✔- continuous
When magnetizing a weld in two directions, and if the current used in the first direction is
750 A and the current in the
second direction is 400 A, which of the following is true - CORRECT ANSWER✔✔- The
part should be checked to see if demagnetization between operations is necessary
When there is absolutely no pattern or distribution of magnetic particles on the part, the
possible cause is that - CORRECT ANSWER✔✔- the amperage setting is too low
What are three causes of nonrelevant indications - CORRECT ANSWER✔✔- change of
section thickness, heat affected zones, drilled hole near surface
Using the residual test method, a number of parts are magnetized and laid on a rack prior to
application of magnetic
particles. Why is it important that they do not rub or touch each other - CORRECT
ANSWER✔✔- It may cause magnetic writing
The point at which the magnetism in a material cannot be increased even though the
magnetizing force continues to
increase is known as the: - CORRECT ANSWER✔✔- saturation point
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