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Midterm 2 Aid cos state board prep quiz 111.14 MDA, Glass Ionomer
68 terms 23 terms 34 terms
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Magnetic particle is a b. locating surface and near-surface discontinuities in
nondestructive testing method ferromagnetic material.
used for:
a. locating surface and near-
surface discontinuities in
aluminum.
b. locating surface and near-
surface discontinuities in
ferromagnetic material.
c. finding and measuring
material separation.
d. measuring flux density
Ferromagnetic material is: a. strongly attracted by a magnetic field.
a. strongly attracted by a
magnetic field.
b. not highly saturated by
magnetic fields.
c. a material with a zero
permeability measurement.
d. not capable of being
magnetized
The permeability of a material a. ease with which it can be magnetized.
describes the:
a. ease with which it can be
magnetized.
b. depth of the magnetic field in
the part.
c. length of time required to
demagnetize it.
d. ability to retain the magnetic
field.
,The retentivity of a material d. ability to retain the magnetic field.
describes the:
a. ease with which it can be
magnetized.
b. depth of the magnetic field in
the part.
c. length of time required to
demagnetize it.
d. ability to retain the magnetic
field.
Magnetic particles are available c. for color contrast with the part surface thereby enhancing
in different colors: a. to detection of indications.
determine if an indication is
surface or subsurface. b. to
enhance the detection of
indications by allowing
background color matching.
c. for color contrast with the
part surface thereby enhancing
detection of indications.
d. to indicate different magnetic
flux values.
Which of the following can be a. Iron
magnetized?
a. Iron.
b. Copper.
c. Aluminum.
d. Magnesium
The magnetic field is strongest b. magnetizing current is flowing.
when the:
a. magnetizing voltage is
flowing.
b. magnetizing current is
flowing.
c. material exhibits high coercive
forces.
d. magnetizing current is not
flowing.
If a crack exists in a circular d. leakage field.
magnet, the attraction of
magnetic particles to the crack
is caused by a:
a. coercive force.
b. high reluctance at the crack.
c. Doppler effect.
d. leakage field.
The unit usually used to denote a. tesla.
flux density is:
a. tesla.
b. henry.
c. farad.
d. ampere
, Which statement is true when b. They are most dense at the poles of a magnet.
related to magnetic lines of
force?
a. They are often forced to cross
due to part geometry.
b. They are most dense at the
poles of a magnet.
c. They seek the path of most
resistance.
d. They cannot be detected.
Magnetic flux lines that are c. no indications.
parallel to a discontinuity
produce:
a. strong indications.
b. weak indications.
c. no indications.
d. fuzzy indications.
A part is susceptible to b. the material is ferromagnetic.
magnetic particle inspection if:
a. it is attached to an
electrostatic field.
b. the material is ferromagnetic.
c. the material is non-ferrous.
d. the material is an electric
conductor
What rule describes the d. Right-hand rule.
direction of current flow (+ to -)
when lines of magnetic force
surround a conductor?
a. Flux rule.
b. Reluctance rule.
c. Left-hand rule.
d. Right-hand rule.
The magnitude of the residual b. strength of the applied magnetizing force.
magnetic field in a specimen is
dependent on the:
a. length of the time current is
applied.
b. strength of the applied
magnetizing force.
c. right-hand rule.
d. left-hand rule
The proper number of ampere- c. its length and diameter.
turns for a given test specimen
being examined by longitudinal
magnetism is determined by:
a. the diameter and the material.
b. the material and the length.
c. its length and diameter.
d. its diameter.