ASNT MT LEVEL II Review
The interpretation of magnetic particle
indications may be aided by:
a. observing with a magnifying glass.
b. reproducing the indication after de-
magnetization. a. observing with a magnifying glass.
c. observing the indications after the part
is pre-cleaned.
d. observing the indications after the part
is post-cleaned.
Residual magnetism may be beneficial
as an aid in:
a. demagnetization.
d. interpretation and evaluation of indica-
b. proper heat treating.
tions
c. the deposition of weld metal.
d. interpretation and evaluation of indica-
tions
An interruption in the normal physical
structure or configuration of a part that
produces a magnetic particle testing in-
dication is called:
d. a discontinuity.
a. a defect.
b. an indication.
c. a deformation.
d. a discontinuity.
Comparing parts that have been circular-
ly magnetized and those that have been
longitudinally magnetized, which retain
the most objectionable residual field if
not demagnetized? d. Longitudinal.
a. Circular.
b. Vectored.
c. Remnant.
d. Longitudinal.
What type of magnetization uses the for-
mula: ampere-turns = 45 000/(L/D)?
d. Longitudinal.
a. Circular.
b. Parallel.
, ASNT MT LEVEL II Review
c. Vectored.
d. Longitudinal.
Why are large soft contact pads, such as
lead or copper braid, used for surfaces or
headstocks?
a. To increase the contact area and re-
duce the possibility of burning the part. a. To increase the contact area and re-
b. Because they help heat metal, thus duce the possibility of burning the part.
facilitating magnetic induction.
c. To increase the contact area and flux
density.
d. Because of their low melting points.
A rough forging that has received no
further processing is magnetic particle
tested. An indication is observed to run
in every direction and appears to extend
deeply into the part and perpendicular to
the surface. It is very sharp. What is the a. Forging burst.
probable identity of the indication?
a. Forging burst.
b. Flake.
c. Seam.
d. Lap.
A gear with case-hardened ground teeth
and hub ends is magnetic particle test-
ed. Individual indications are detected on
five teeth and one end surface of the hub.
The indications do not break over the
part edges. What is the probable identity a. Grinding cracks.
of the indication?
a. Grinding cracks.
b. Quench cracks.
c. Inclusions.
d. Porosity
Points on a piece where the magnetic
flux lines enter and leave the piece are
c. magnetic poles.
called:
a. magnetic domains.
, ASNT MT LEVEL II Review
b. magnetographs.
c. magnetic poles.
d. magnetic particles.
A prime consideration when selecting a
powder to be used as a magnetic particle
medium is to select a powder that:
a. will adhere to the surface being tested.
b. provides a low contrast to the surface c. provides a high contrast to the surface
being tested. being tested.
c. provides a high contrast to the surface
being tested.
d. requires a high demagnetization cur-
rent to remove it
When testing for fine shallow surface
cracks, the preferred magnetic particle
test method should be:
a. dry alternating current. c. wet alternating current.
b. dry direct current.
c. wet alternating current.
d. wet direct current.
Which of the following is an advantage
of the dry technique over the wet tech-
nique?
a. It is more sensitive to fine surface
cracks.
b. It is easier to use for field inspection b. It is easier to use for field inspection
with portable equipment. with portable equipment.
c. It is faster than the wet technique when
testing a number of small parts.
d. It is more capable of providing full
surface coverage on irregularly shaped
parts.
When testing a bar with a length-to-di-
ameter ratio of 4 in a 10-turn coil, the
required current would be: c. 1125 A.
a. 45 000 A.
b. 18 000 A.
The interpretation of magnetic particle
indications may be aided by:
a. observing with a magnifying glass.
b. reproducing the indication after de-
magnetization. a. observing with a magnifying glass.
c. observing the indications after the part
is pre-cleaned.
d. observing the indications after the part
is post-cleaned.
Residual magnetism may be beneficial
as an aid in:
a. demagnetization.
d. interpretation and evaluation of indica-
b. proper heat treating.
tions
c. the deposition of weld metal.
d. interpretation and evaluation of indica-
tions
An interruption in the normal physical
structure or configuration of a part that
produces a magnetic particle testing in-
dication is called:
d. a discontinuity.
a. a defect.
b. an indication.
c. a deformation.
d. a discontinuity.
Comparing parts that have been circular-
ly magnetized and those that have been
longitudinally magnetized, which retain
the most objectionable residual field if
not demagnetized? d. Longitudinal.
a. Circular.
b. Vectored.
c. Remnant.
d. Longitudinal.
What type of magnetization uses the for-
mula: ampere-turns = 45 000/(L/D)?
d. Longitudinal.
a. Circular.
b. Parallel.
, ASNT MT LEVEL II Review
c. Vectored.
d. Longitudinal.
Why are large soft contact pads, such as
lead or copper braid, used for surfaces or
headstocks?
a. To increase the contact area and re-
duce the possibility of burning the part. a. To increase the contact area and re-
b. Because they help heat metal, thus duce the possibility of burning the part.
facilitating magnetic induction.
c. To increase the contact area and flux
density.
d. Because of their low melting points.
A rough forging that has received no
further processing is magnetic particle
tested. An indication is observed to run
in every direction and appears to extend
deeply into the part and perpendicular to
the surface. It is very sharp. What is the a. Forging burst.
probable identity of the indication?
a. Forging burst.
b. Flake.
c. Seam.
d. Lap.
A gear with case-hardened ground teeth
and hub ends is magnetic particle test-
ed. Individual indications are detected on
five teeth and one end surface of the hub.
The indications do not break over the
part edges. What is the probable identity a. Grinding cracks.
of the indication?
a. Grinding cracks.
b. Quench cracks.
c. Inclusions.
d. Porosity
Points on a piece where the magnetic
flux lines enter and leave the piece are
c. magnetic poles.
called:
a. magnetic domains.
, ASNT MT LEVEL II Review
b. magnetographs.
c. magnetic poles.
d. magnetic particles.
A prime consideration when selecting a
powder to be used as a magnetic particle
medium is to select a powder that:
a. will adhere to the surface being tested.
b. provides a low contrast to the surface c. provides a high contrast to the surface
being tested. being tested.
c. provides a high contrast to the surface
being tested.
d. requires a high demagnetization cur-
rent to remove it
When testing for fine shallow surface
cracks, the preferred magnetic particle
test method should be:
a. dry alternating current. c. wet alternating current.
b. dry direct current.
c. wet alternating current.
d. wet direct current.
Which of the following is an advantage
of the dry technique over the wet tech-
nique?
a. It is more sensitive to fine surface
cracks.
b. It is easier to use for field inspection b. It is easier to use for field inspection
with portable equipment. with portable equipment.
c. It is faster than the wet technique when
testing a number of small parts.
d. It is more capable of providing full
surface coverage on irregularly shaped
parts.
When testing a bar with a length-to-di-
ameter ratio of 4 in a 10-turn coil, the
required current would be: c. 1125 A.
a. 45 000 A.
b. 18 000 A.
