2. • Played like Jeopardy
• Team with the biggest flux wins
• 3 teams to compete
• Buzz in to answer question and wait for the
host to request teams response
• Final question will be written on provided
paper
RULES
5. A material that has the ability to
attract iron or steel (and some other
metallic materials).
What is a magnet?
First Shot - Magnetism
100 amps
6. This type of material, characteristic,
that is not able to be magnetized and
are repelled by magnetism.
What is diamagnetic materials?
First Shot - Magnetism
200 amps
7. These lines of force never cross; they
seek the path of least magnetic
resistance; they are the most densely
packed at the poles of the magnet;
they flow from north to south outside
the magnet, but from south to north
poles within the magnet; and they do
not enter or leave at the center of the
magnetic field.
What is magnetic flux?
First Shot - Magnetism
300 amps
8. Defined as the reverse magnetizing
force necessary to remove the residual
magnetism so as to demagnetize an
article.
What coercive force?
First Shot - Magnetism
400 amps
9. The magnetic lines existing in a magnetic
circuit are called magnetic flux. Its unit is
a single line force usually designated by
the Greek letter phi.
What is Maxwell?
First Shot - Magnetism
500 amps
10. The direction of the magnetic
field, lines of force, are at what
angle to that of the current in the
conductor.
What is 90 degrees?
First Shot - Fields
100 amps
11. An easy way to determine the
direction of an electrically-induced
magnetic field is to imagine grasping
the conductor with the thumb pointing
in the direction of the current flow.
What is the right-hand rule?
First Shot - Fields
200 amps
12. A permanent bar magnet is the best
known example.
What is longitudinal magnetization?
First Shot - Fields
300 amps
13. This type of field is accomplished by
passing a current through the article.
What is direct induction?
First Shot - Fields
400 amps
14. Magnetic flux orientation to the
discontinuity is critical in its detection.
When using longitudinal fields you
would not be able to find this
orientation of a discontinuity?
What is perpendicular?
First Shot - Fields
500 amps
15. This type of current creates a
maximum flux at the surface of the
magnetized article, and has relatively
little penetrating ability.
What is alternating current?
First Shot - Currents
100 amps
16. This current is the most sensitive in
detecting subsurface discontinuities.
What is half-wave direct current?
First Shot - Currents
200 amps
17. For reliable coil magnetization, the
article to be magnetized must be what
relation to its diameter or width.
What is at least twice as long?
First Shot - Currents
300 amps
18. Permits current to flow only during the
positive half cycles of the applied
alternating current voltage; the current thus
becomes a pulsating direct current.
What is a rectifier?
First Shot - Currents
400 amps
19. This indicates that the field strength is
to great, utilizing prods, and causes the
accumulation of particles between the
points of the prods and tends to form
bands.
What is banding?
First Shot - Currents
500 amps
20. May be caused by excessive
magnetizing current, structural design
of an article, or variances of
permeability within the article itself.
What is nonrelevant indications?
First Shot - Indications
100 amps
21. Caused when magnetic particles are
accumulated and held mechanically or
by gravity in surface irregularities.
What is false indications?
First Shot - Indications
200 amps
22. These discontinuities tend to produce
sharp, distinct, clean-cut and tightly
held indication patterns.
What is surface indications?
First Shot - Indications
300 amps
23. These discontinuities tend to
produce indications which are less
distinct, diffused, or fuzzy.
What is subsurface indications?
First Shot - Indications
400 amps
24. A form of nonrelevant indications
caused when the surface of a
magnetized part comes in contact with
another piece of ferromagnetic material
that is magnetized to a different value.
What is magnetic writing?
First Shot - Indications
500 amps
25. Uses a medium with the particles
suspended in either a water or oil bath.
What is wet continuous?
First Shot - Techniques
100 amps
26. When an article is made of
ferromagnetic material is magnetized,
some of the magnetic field remains in
the article after the magnetizing
current is shut off.
What is residual field?
First Shot - Techniques
200 amps
27. If the bath flow is not stopped
when the final magnetizing
current is applied, wet continuous
technique, these indications may
be washed away.
What is lightly held surface
indications?
First Shot - Techniques
300 amps
28. What is a ¼ inch?
Magnetic particle testing will not
detect discontinuities deeper than
below the surface.
First Shot - Techniques
400 amps
29. Cracked black light filters will damage
the eye from the electromagnetic
spectrum rays emitted.
What is UV rays?
First Shot - Techniques
500 amps
30. An electrical conductor that is passed
through the opening in a ring or tube
or any hole in an article for the
purpose of creating a circular field in
the ring or tube or around the hole.
What is central conductor?
First Shot - Definitions
100 amps
31. The reduction in the degree of residual
magnetism to an acceptable level.
What is demagnetization?
First Shot - Definitions
200 amps
32. The emission of visible radiation by a
substance as the result of and only
during the absorption of black light
radiation.
What is fluorescence?
First Shot - Definitions
300 amps
33. An instrument designed to detect
and/or measure the flux density and
polarity of magnetic fields.
What is a magnetic field indicator?
First Shot - Definitions
400 amps
34. The temperature at which
ferromagnetic materials can no longer
be magnetized by outside forces and at
which they lose their residual
magnetism.
What is curie point?
First Shot - Definitions
500 amps
